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Molecular phylogenetics - Wikipedia

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mw-list-item"><a href="https://ast.wikipedia.org/wiki/Filoxen%C3%A9tica_molecular" title="Filoxenética molecular – Asturian" lang="ast" hreflang="ast" data-title="Filoxenética molecular" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Molekularna_sistematika" title="Molekularna sistematika – Bosnian" lang="bs" hreflang="bs" data-title="Molekularna sistematika" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Filog%C3%A8nia_molecular" title="Filogènia molecular – Catalan" lang="ca" hreflang="ca" data-title="Filogènia molecular" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Filogen%C3%A9tica_molecular" title="Filogenética molecular – Spanish" lang="es" hreflang="es" data-title="Filogenética molecular" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Molekula_filogenetiko" title="Molekula filogenetiko – Esperanto" lang="eo" hreflang="eo" data-title="Molekula filogenetiko" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D8%A8%D8%A7%D8%B1%D8%B2%D8%A7%DB%8C%DB%8C_%D9%85%D9%88%D9%84%DA%A9%D9%88%D9%84%DB%8C" title="تبارزایی مولکولی – Persian" lang="fa" hreflang="fa" data-title="تبارزایی مولکولی" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Phylog%C3%A9n%C3%A9tique_mol%C3%A9culaire" title="Phylogénétique moléculaire – French" lang="fr" hreflang="fr" data-title="Phylogénétique moléculaire" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Filoxenia_molecular" title="Filoxenia molecular – Galician" lang="gl" hreflang="gl" data-title="Filoxenia molecular" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%86%E0%A4%A3%E0%A5%8D%E0%A4%B5%E0%A4%BF%E0%A4%95_%E0%A4%9C%E0%A4%BE%E0%A4%A4%E0%A4%BF%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%BF%E0%A4%95%E0%A5%80" title="आण्विक जातिवृत्तिकी – Hindi" lang="hi" hreflang="hi" data-title="आण्विक जातिवृत्तिकी" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Molekularna_filogenija" title="Molekularna filogenija – Croatian" lang="hr" hreflang="hr" data-title="Molekularna filogenija" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Filogenetika_molekuler" title="Filogenetika molekuler – Indonesian" lang="id" hreflang="id" data-title="Filogenetika molekuler" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Filogenesi_molecolare" title="Filogenesi molecolare – Italian" lang="it" hreflang="it" data-title="Filogenesi molecolare" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%88%86%E5%AD%90%E7%B3%BB%E7%B5%B1%E5%AD%A6" title="分子系統学 – Japanese" lang="ja" hreflang="ja" data-title="分子系統学" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Filogenetyka_molekularna" title="Filogenetyka molekularna – Polish" lang="pl" hreflang="pl" data-title="Filogenetyka molekularna" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Filogen%C3%A9tica_molecular" title="Filogenética molecular – Portuguese" lang="pt" hreflang="pt" data-title="Filogenética molecular" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Filogenie_molecular%C4%83" title="Filogenie moleculară – Romanian" lang="ro" hreflang="ro" data-title="Filogenie moleculară" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D0%B5%D0%BA%D1%83%D0%BB%D1%8F%D1%80%D0%BD%D0%B0%D1%8F_%D1%84%D0%B8%D0%BB%D0%BE%D0%B3%D0%B5%D0%BD%D0%B5%D1%82%D0%B8%D0%BA%D0%B0" title="Молекулярная филогенетика – Russian" lang="ru" hreflang="ru" data-title="Молекулярная филогенетика" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Molekularna_filogenija" title="Molekularna filogenija – Serbian" lang="sr" hreflang="sr" data-title="Molekularna filogenija" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Molekularna_filogenija" title="Molekularna filogenija – Serbo-Croatian" lang="sh" hreflang="sh" 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<div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Branch of phylogeny that analyzes genetic, hereditary molecular differences</div> <p><b>Molecular phylogenetics</b> (<span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="&#39;m&#39; in &#39;my&#39;">m</span><span title="/ə/: &#39;a&#39; in &#39;about&#39;">ə</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="&#39;l&#39; in &#39;lie&#39;">l</span><span title="/ɛ/: &#39;e&#39; in &#39;dress&#39;">ɛ</span><span title="&#39;k&#39; in &#39;kind&#39;">k</span><span title="/j/: &#39;y&#39; in &#39;yes&#39;">j</span><span title="/ʊ/: &#39;u&#39; in &#39;push&#39;">ʊ</span><span title="&#39;l&#39; in &#39;lie&#39;">l</span><span title="/ər/: &#39;er&#39; in &#39;letter&#39;">ər</span></span><span class="wrap"> </span><span style="border-bottom:1px dotted"><span title="/ˌ/: secondary stress follows">ˌ</span><span title="&#39;f&#39; in &#39;find&#39;">f</span><span title="/aɪ/: &#39;i&#39; in &#39;tide&#39;">aɪ</span><span title="&#39;l&#39; in &#39;lie&#39;">l</span><span title="/oʊ/: &#39;o&#39; in &#39;code&#39;">oʊ</span><span title="/dʒ/: &#39;j&#39; in &#39;jam&#39;">dʒ</span><span title="/ə/: &#39;a&#39; in &#39;about&#39;">ə</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="&#39;n&#39; in &#39;nigh&#39;">n</span><span title="/ɛ/: &#39;e&#39; in &#39;dress&#39;">ɛ</span><span title="&#39;t&#39; in &#39;tie&#39;">t</span><span title="/ɪ/: &#39;i&#39; in &#39;kit&#39;">ɪ</span><span title="&#39;k&#39; in &#39;kind&#39;">k</span><span title="&#39;s&#39; in &#39;sigh&#39;">s</span></span>,<span class="wrap"> </span><span style="border-bottom:1px dotted"><span title="&#39;m&#39; in &#39;my&#39;">m</span><span title="/ɒ/: &#39;o&#39; in &#39;body&#39;">ɒ</span></span>-,<span class="wrap"> </span><span style="border-bottom:1px dotted"><span title="&#39;m&#39; in &#39;my&#39;">m</span><span title="/oʊ/: &#39;o&#39; in &#39;code&#39;">oʊ</span></span>-/</a></span></span><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup>) is the branch of <a href="/wiki/Phylogeny" class="mw-redirect" title="Phylogeny">phylogeny</a> that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular <a href="/wiki/Phylogenetics" title="Phylogenetics">phylogenetic</a> analysis is expressed in a <a href="/wiki/Phylogenetic_tree" title="Phylogenetic tree">phylogenetic tree</a>. Molecular phylogenetics is one aspect of <b>molecular systematics</b>, a broader term that also includes the use of molecular data in <a href="/wiki/Taxonomy_(biology)" title="Taxonomy (biology)">taxonomy</a> and <a href="/wiki/Biogeography" title="Biogeography">biogeography</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> </p><p>Molecular phylogenetics and <a href="/wiki/Molecular_evolution" title="Molecular evolution">molecular evolution</a> correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/History_of_molecular_evolution" title="History of molecular evolution">History of molecular evolution</a></div> <p>The theoretical frameworks for molecular <a href="/wiki/Systematics" title="Systematics">systematics</a> were laid in the 1960s in the works of <a href="/wiki/Emile_Zuckerkandl" title="Emile Zuckerkandl">Emile Zuckerkandl</a>, <a href="/wiki/Emanuel_Margoliash" title="Emanuel Margoliash">Emanuel Margoliash</a>, <a href="/wiki/Linus_Pauling" title="Linus Pauling">Linus Pauling</a>, and <a href="/wiki/Walter_M._Fitch" title="Walter M. Fitch">Walter M. Fitch</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> Applications of molecular systematics were pioneered by <a href="/wiki/Charles_Sibley" title="Charles Sibley">Charles G. Sibley</a> (<a href="/wiki/Bird" title="Bird">birds</a>), <a href="/wiki/Herbert_C._Dessauer" title="Herbert C. Dessauer">Herbert C. Dessauer</a> (<a href="/wiki/Herpetology" title="Herpetology">herpetology</a>), and <a href="/wiki/Morris_Goodman_(scientist)" title="Morris Goodman (scientist)">Morris Goodman</a> (<a href="/wiki/Primate" title="Primate">primates</a>), followed by <a href="/wiki/Allan_Wilson_(biologist)" title="Allan Wilson (biologist)">Allan C. Wilson</a>, <a href="/wiki/Robert_K._Selander" title="Robert K. Selander">Robert K. Selander</a>, and <a href="/wiki/John_C._Avise" class="mw-redirect" title="John C. Avise">John C. Avise</a> (who studied various groups). Work with <a href="/wiki/Protein_electrophoresis" class="mw-redirect" title="Protein electrophoresis">protein electrophoresis</a> began around 1956. Although the results were not quantitative and did not initially improve on morphological classification, they provided tantalizing hints that long-held notions of the classifications of <a href="/wiki/Bird" title="Bird">birds</a>, for example, needed substantial revision. In the period of 1974–1986, <a href="/wiki/DNA%E2%80%93DNA_hybridization" title="DNA–DNA hybridization">DNA–DNA hybridization</a> was the dominant technique used to measure genetic difference.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Theoretical_background">Theoretical background</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=2" title="Edit section: Theoretical background"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Early attempts at molecular systematics were also termed <a href="/wiki/Chemotaxonomy" title="Chemotaxonomy">chemotaxonomy</a> and made use of proteins, <a href="/wiki/Enzyme" title="Enzyme">enzymes</a>, <a href="/wiki/Carbohydrate" title="Carbohydrate">carbohydrates</a>, and other molecules that were separated and characterized using techniques such as <a href="/wiki/Chromatography" title="Chromatography">chromatography</a>. These have been replaced in recent times largely by <a href="/wiki/DNA_sequencing" title="DNA sequencing">DNA sequencing</a>, which produces the exact sequences of <a href="/wiki/Nucleotides" class="mw-redirect" title="Nucleotides">nucleotides</a> or <i>bases</i> in either DNA or RNA segments extracted using different techniques. In general, these are considered superior for evolutionary studies, since the actions of evolution are ultimately reflected in the genetic sequences. At present, it is still a long and expensive process to sequence the entire DNA of an organism (its <a href="/wiki/Genome" title="Genome">genome</a>). However, it is quite feasible to determine the sequence of a defined area of a particular <a href="/wiki/Chromosome" title="Chromosome">chromosome</a>. Typical molecular systematic analyses require the sequencing of around 1000 <a href="/wiki/Base_pair" title="Base pair">base pairs</a>. At any location within such a sequence, the bases found in a given position may vary between organisms. The particular sequence found in a given organism is referred to as its <a href="/wiki/Haplotype" title="Haplotype">haplotype</a>. In principle, since there are four base types, with 1000 base pairs, we could have 4<sup>1000</sup> distinct haplotypes. However, for organisms within a particular species or in a group of related species, it has been found empirically that only a minority of sites show any variation at all, and most of the variations that are found are correlated, so that the number of distinct haplotypes that are found is relatively small.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Clade_in_Phylogenetic_Tree.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/16/Clade_in_Phylogenetic_Tree.png/400px-Clade_in_Phylogenetic_Tree.png" decoding="async" width="400" height="209" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/16/Clade_in_Phylogenetic_Tree.png/600px-Clade_in_Phylogenetic_Tree.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/16/Clade_in_Phylogenetic_Tree.png/800px-Clade_in_Phylogenetic_Tree.png 2x" data-file-width="1182" data-file-height="617" /></a><figcaption>In a phylogenetic tree, numerous groupings (clades) exist. A clade may be defined as a group of organisms having a common ancestor throughout evolution. This figure illustrates how a clade in a phylogenetic tree may be expressed.</figcaption></figure> <p>In a molecular systematic analysis, the haplotypes are determined for a defined area of <a href="/wiki/Genetic_material" class="mw-redirect" title="Genetic material">genetic material</a>; a substantial sample of individuals of the target <a href="/wiki/Species" title="Species">species</a> or other <a href="/wiki/Taxon" title="Taxon">taxon</a> is used; however, many current studies are based on single individuals. Haplotypes of individuals of closely related, yet different, taxa are also determined. Finally, haplotypes from a smaller number of individuals from a definitely different taxon are determined: these are referred to as an <a href="/wiki/Outgroup_(cladistics)" title="Outgroup (cladistics)">outgroup</a>. The base sequences for the haplotypes are then compared. In the simplest case, the difference between two haplotypes is assessed by counting the number of locations where they have different bases: this is referred to as the number of <i>substitutions</i> (other kinds of differences between haplotypes can also occur, for example, the <i>insertion</i> of a section of <a href="/wiki/Nucleic_acid" title="Nucleic acid">nucleic acid</a> in one haplotype that is not present in another). The difference between organisms is usually re-expressed as a <i>percentage divergence</i>, by dividing the number of substitutions by the number of base pairs analysed: the hope is that this measure will be independent of the location and length of the section of DNA that is sequenced. </p><p>An older and superseded approach was to determine the divergences between the <a href="/wiki/Genotype" title="Genotype">genotypes</a> of individuals by <a href="/wiki/DNA%E2%80%93DNA_hybridization" title="DNA–DNA hybridization">DNA–DNA hybridization</a>. The advantage claimed for using hybridization rather than gene sequencing was that it was based on the entire genotype, rather than on particular sections of DNA. Modern sequence comparison techniques overcome this objection by the use of multiple sequences. </p><p>Once the divergences between all pairs of samples have been determined, the resulting <a href="/wiki/Triangular_matrix" title="Triangular matrix">triangular matrix</a> of differences is submitted to some form of statistical <a href="/wiki/Cluster_analysis" title="Cluster analysis">cluster analysis</a>, and the resulting <a href="/wiki/Dendrogram" title="Dendrogram">dendrogram</a> is examined in order to see whether the samples cluster in the way that would be expected from current ideas about the taxonomy of the group. Any group of haplotypes that are all more similar to one another than any of them is to any other haplotype may be said to constitute a <a href="/wiki/Clade" title="Clade">clade</a>, which may be visually represented as the figure displayed on the right demonstrates. <a href="/wiki/Statistical" class="mw-redirect" title="Statistical">Statistical</a> techniques such as <a href="/wiki/Bootstrapping_(statistics)" title="Bootstrapping (statistics)">bootstrapping</a> and <a href="/wiki/Resampling_(statistics)#Jackknife" title="Resampling (statistics)">jackknifing</a> help in providing reliability estimates for the positions of haplotypes within the evolutionary trees. </p> <div class="mw-heading mw-heading2"><h2 id="Techniques_and_applications">Techniques and applications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=3" title="Edit section: Techniques and applications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Every living <a href="/wiki/Organism" title="Organism">organism</a> contains deoxyribonucleic acid (<a href="/wiki/DNA" title="DNA">DNA</a>), ribonucleic acid (<a href="/wiki/RNA" title="RNA">RNA</a>), and <a href="/wiki/Protein" title="Protein">proteins</a>. In general, closely related organisms have a high degree of similarity in the <a href="/wiki/Molecular_structure" class="mw-redirect" title="Molecular structure">molecular structure</a> of these substances, while the molecules of organisms distantly related often show a pattern of dissimilarity. Conserved sequences, such as mitochondrial DNA, are expected to accumulate mutations over time, and assuming a constant rate of mutation, provide a <a href="/wiki/Molecular_clock" title="Molecular clock">molecular clock</a> for dating divergence. Molecular phylogeny uses such data to build a "relationship tree" that shows the probable <a href="/wiki/Evolution" title="Evolution">evolution</a> of various organisms. With the invention of <a href="/wiki/Sanger_sequencing" title="Sanger sequencing">Sanger sequencing</a> in 1977, it became possible to isolate and identify these molecular structures.<sup id="cite_ref-Sanger75_10-0" class="reference"><a href="#cite_note-Sanger75-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Sanger1977_11-0" class="reference"><a href="#cite_note-Sanger1977-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/DNA_sequencing#High-throughput_methods" title="DNA sequencing">High-throughput sequencing</a> may also be used to obtain the <a href="/wiki/Transcriptome" title="Transcriptome">transcriptome</a> of an organism, allowing <a href="/wiki/Phylogenetic_inference_using_transcriptomic_data" title="Phylogenetic inference using transcriptomic data">inference of phylogenetic relationships using transcriptomic data</a>. </p><p>The most common approach is the comparison of <a href="/wiki/Homologous_sequence" class="mw-redirect" title="Homologous sequence">homologous sequences</a> for genes using <a href="/wiki/Sequence_alignment" title="Sequence alignment">sequence alignment</a> techniques to identify similarity. Another application of molecular phylogeny is in <a href="/wiki/DNA_barcoding" title="DNA barcoding">DNA barcoding</a>, wherein the species of an individual organism is identified using small sections of <a href="/wiki/Mitochondrial_DNA" title="Mitochondrial DNA">mitochondrial DNA</a> or <a href="/wiki/Chloroplast_DNA" title="Chloroplast DNA">chloroplast DNA</a>. Another application of the techniques that make this possible can be seen in the very limited field of human genetics, such as the ever-more-popular use of <a href="/wiki/Genetic_testing" title="Genetic testing">genetic testing</a> to determine a child's <a href="/wiki/Parent" title="Parent">paternity</a>, as well as the emergence of a new branch of criminal <a href="/wiki/Forensics" class="mw-redirect" title="Forensics">forensics</a> focused on evidence known as <a href="/wiki/Genetic_fingerprinting" class="mw-redirect" title="Genetic fingerprinting">genetic fingerprinting</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Molecular_phylogenetic_analysis">Molecular phylogenetic analysis</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=4" title="Edit section: Molecular phylogenetic analysis"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are several methods available for performing a molecular phylogenetic analysis. One method, including a comprehensive step-by-step protocol on constructing a phylogenetic tree, including DNA/Amino Acid contiguous sequence assembly, <a href="/wiki/Multiple_sequence_alignment" title="Multiple sequence alignment">multiple sequence alignment</a>, model-test (testing best-fitting substitution models), and phylogeny reconstruction using Maximum Likelihood and Bayesian Inference, is available at Nature Protocol.<sup id="cite_ref-Bast_12-0" class="reference"><a href="#cite_note-Bast-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> </p><p>Another molecular phylogenetic analysis technique has been described by Pevsner and shall be summarized in the sentences to follow (Pevsner, 2015). A phylogenetic analysis typically consists of five major steps. The first stage comprises sequence acquisition. The following step consists of performing a multiple sequence alignment, which is the fundamental basis of constructing a phylogenetic tree. The third stage includes different models of DNA and amino acid substitution. Several models of substitution exist. A few examples include <a href="/wiki/Hamming_distance" title="Hamming distance">Hamming distance</a>, the Jukes and Cantor one-parameter model, and the Kimura two-parameter model (see <a href="/wiki/Models_of_DNA_evolution" title="Models of DNA evolution">Models of DNA evolution</a>). The fourth stage consists of various methods of tree building, including distance-based and character-based methods. The normalized Hamming distance and the Jukes-Cantor correction formulas provide the degree of divergence and the probability that a nucleotide changes to another, respectively. Common tree-building methods include unweighted pair group method using arithmetic mean (<a href="/wiki/UPGMA" title="UPGMA">UPGMA</a>) and <a href="/wiki/Neighbor_joining" title="Neighbor joining">Neighbor joining</a>, which are distance-based methods, <a href="/wiki/Maximum_parsimony_(phylogenetics)" title="Maximum parsimony (phylogenetics)">Maximum parsimony</a>, which is a character-based method, and <a href="/wiki/Maximum_likelihood_estimation" title="Maximum likelihood estimation">Maximum likelihood estimation</a> and <a href="/wiki/Bayesian_inference_in_phylogeny" title="Bayesian inference in phylogeny">Bayesian inference</a>, which are character-based/model-based methods. UPGMA is a simple method; however, it is less accurate than the neighbor-joining approach. Finally, the last step comprises evaluating the trees. This assessment of accuracy is composed of consistency, efficiency, and robustness.<sup id="cite_ref-Pevsner_13-0" class="reference"><a href="#cite_note-Pevsner-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-halign-center" typeof="mw:File/Thumb"><a href="/wiki/File:Five_Stages_of_Molecular_Phylogenetic_Analysis.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Five_Stages_of_Molecular_Phylogenetic_Analysis.png/721px-Five_Stages_of_Molecular_Phylogenetic_Analysis.png" decoding="async" width="721" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Five_Stages_of_Molecular_Phylogenetic_Analysis.png/1082px-Five_Stages_of_Molecular_Phylogenetic_Analysis.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Five_Stages_of_Molecular_Phylogenetic_Analysis.png/1442px-Five_Stages_of_Molecular_Phylogenetic_Analysis.png 2x" data-file-width="1964" data-file-height="218" /></a><figcaption>Five Stages of Molecular Phylogenetic Analysis</figcaption></figure> <p><a href="/wiki/MEGA,_Molecular_Evolutionary_Genetics_Analysis" class="mw-redirect" title="MEGA, Molecular Evolutionary Genetics Analysis">MEGA (molecular evolutionary genetics analysis)</a> is an analysis software that is user-friendly and free to download and use. This software is capable of analyzing both distance-based and character-based tree methodologies. MEGA also contains several options one may choose to utilize, such as heuristic approaches and bootstrapping. <a href="/wiki/Bootstrapping_(statistics)" title="Bootstrapping (statistics)">Bootstrapping</a> is an approach that is commonly used to measure the robustness of topology in a phylogenetic tree, which demonstrates the percentage each clade is supported after numerous replicates. In general, a value greater than 70% is considered significant. The flow chart displayed on the right visually demonstrates the order of the five stages of Pevsner's molecular phylogenetic analysis technique that have been described.<sup id="cite_ref-Pevsner_13-1" class="reference"><a href="#cite_note-Pevsner-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Limitations">Limitations</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=5" title="Edit section: Limitations"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Molecular systematics is an essentially <a href="/wiki/Cladistics" title="Cladistics">cladistic</a> approach: it assumes that classification must correspond to phylogenetic descent, and that all valid taxa must be <a href="/wiki/Monophyletic" class="mw-redirect" title="Monophyletic">monophyletic</a>. This is a limitation when attempting to determine the optimal tree(s), which often involves bisecting and reconnecting portions of the phylogenetic tree(s). </p><p>The recent discovery of extensive <a href="/wiki/Horizontal_gene_transfer" title="Horizontal gene transfer">horizontal gene transfer</a> among organisms provides a significant complication to molecular systematics, indicating that different genes within the same organism can have different phylogenies. HGTs can be detected and excluded using a number of phylogenetic methods (see <a href="/wiki/Inferring_horizontal_gene_transfer#Explicit_phylogenetic_methods" title="Inferring horizontal gene transfer">Inferring horizontal gene transfer §&#160;Explicit phylogenetic methods</a>). </p><p>In addition, molecular phylogenies are sensitive to the assumptions and models that go into making them. Firstly, sequences must be aligned; then, issues such as <a href="/wiki/Long-branch_attraction" class="mw-redirect" title="Long-branch attraction">long-branch attraction</a>, <a href="/wiki/Saturation_(genetic)" class="mw-redirect" title="Saturation (genetic)">saturation</a>, and <a href="/wiki/Taxon" title="Taxon">taxon</a> sampling problems must be addressed. This means that strikingly different results can be obtained by applying different models to the same dataset.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Philippe2011_15-0" class="reference"><a href="#cite_note-Philippe2011-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> The tree-building method also brings with it specific assumptions about tree topology, evolution speeds, and sampling. The simplistic UPGMA assumes a rooted tree and a uniform molecular clock, both of which can be incorrect.<sup id="cite_ref-Pevsner_13-2" class="reference"><a href="#cite_note-Pevsner-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Computational_phylogenetics" title="Computational phylogenetics">Computational phylogenetics</a></li> <li><a href="/wiki/Microbial_phylogenetics" title="Microbial phylogenetics">Microbial phylogenetics</a></li> <li><a href="/wiki/Molecular_clock" title="Molecular clock">Molecular clock</a></li> <li><a href="/wiki/Molecular_evolution" title="Molecular evolution">Molecular evolution</a></li> <li><a href="/wiki/PhyloCode" title="PhyloCode">PhyloCode</a></li> <li><a href="/wiki/Phylogenetic_nomenclature" title="Phylogenetic nomenclature">Phylogenetic nomenclature</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes_and_references">Notes and references</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=7" title="Edit section: Notes and references"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output 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Wiley-Blackwell. pp.&#160;245–295. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-118-58178-0" title="Special:BookSources/978-1-118-58178-0"><bdi>978-1-118-58178-0</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Chapter+7%3A+Molecular+Phylogeny+and+Evolution&amp;rft.btitle=Bioinformatics+and+Functional+Genomics&amp;rft.pages=245-295&amp;rft.edition=3rd&amp;rft.pub=Wiley-Blackwell&amp;rft.date=2015&amp;rft.isbn=978-1-118-58178-0&amp;rft.aulast=Pevsner&amp;rft.aufirst=J.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMolecular+phylogenetics" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCabra-GarcíaHormiga2020" class="citation journal cs1">Cabra-García, Jimmy; Hormiga, Gustavo (2020). "Exploring the impact of morphology, multiple sequence alignment and choice of optimality criteria in phylogenetic inference: A case study with the Neotropical orb-weaving spider genus Wagneriana (Araneae: Araneidae)". <i>Zoological Journal of the Linnean Society</i>. <b>188</b> (4): 976–1151. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fzoolinnean%2Fzlz088">10.1093/zoolinnean/zlz088</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Zoological+Journal+of+the+Linnean+Society&amp;rft.atitle=Exploring+the+impact+of+morphology%2C+multiple+sequence+alignment+and+choice+of+optimality+criteria+in+phylogenetic+inference%3A+A+case+study+with+the+Neotropical+orb-weaving+spider+genus+Wagneriana+%28Araneae%3A+Araneidae%29&amp;rft.volume=188&amp;rft.issue=4&amp;rft.pages=976-1151&amp;rft.date=2020&amp;rft_id=info%3Adoi%2F10.1093%2Fzoolinnean%2Fzlz088&amp;rft.aulast=Cabra-Garc%C3%ADa&amp;rft.aufirst=Jimmy&amp;rft.au=Hormiga%2C+Gustavo&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMolecular+phylogenetics" class="Z3988"></span></span> </li> <li id="cite_note-Philippe2011-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-Philippe2011_15-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPhilippeBrinkmannLavrovLittlewood2011" class="citation journal cs1">Philippe, H.; Brinkmann, H.; Lavrov, D. V.; Littlewood, D. T. J.; Manuel, M.; Wörheide, G.; Baurain, D. (2011). Penny, David (ed.). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3057953">"Resolving Difficult Phylogenetic Questions: Why More Sequences Are Not Enough"</a>. <i>PLOS Biology</i>. <b>9</b> (3): e1000602. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1371%2Fjournal.pbio.1000602">10.1371/journal.pbio.1000602</a></span>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a>&#160;<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3057953">3057953</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/21423652">21423652</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=PLOS+Biology&amp;rft.atitle=Resolving+Difficult+Phylogenetic+Questions%3A+Why+More+Sequences+Are+Not+Enough&amp;rft.volume=9&amp;rft.issue=3&amp;rft.pages=e1000602&amp;rft.date=2011&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC3057953%23id-name%3DPMC&amp;rft_id=info%3Apmid%2F21423652&amp;rft_id=info%3Adoi%2F10.1371%2Fjournal.pbio.1000602&amp;rft.aulast=Philippe&amp;rft.aufirst=H.&amp;rft.au=Brinkmann%2C+H.&amp;rft.au=Lavrov%2C+D.+V.&amp;rft.au=Littlewood%2C+D.+T.+J.&amp;rft.au=Manuel%2C+M.&amp;rft.au=W%C3%B6rheide%2C+G.&amp;rft.au=Baurain%2C+D.&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC3057953&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMolecular+phylogenetics" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=8" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSan_MauroAgorreta,_A.2010" class="citation journal cs1">San Mauro, D.; Agorreta, A. (2010). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6275913">"Molecular systematics: a synthesis of the common methods and the state of knowledge"</a>. <i>Cellular &amp; Molecular Biology Letters</i>. <b>15</b> (2): 311–341. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.2478%2Fs11658-010-0010-8">10.2478/s11658-010-0010-8</a></span>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a>&#160;<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6275913">6275913</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/20213503">20213503</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Cellular+%26+Molecular+Biology+Letters&amp;rft.atitle=Molecular+systematics%3A+a+synthesis+of+the+common+methods+and+the+state+of+knowledge&amp;rft.volume=15&amp;rft.issue=2&amp;rft.pages=311-341&amp;rft.date=2010&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC6275913%23id-name%3DPMC&amp;rft_id=info%3Apmid%2F20213503&amp;rft_id=info%3Adoi%2F10.2478%2Fs11658-010-0010-8&amp;rft.aulast=San+Mauro&amp;rft.aufirst=D.&amp;rft.au=Agorreta%2C+A.&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC6275913&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMolecular+phylogenetics" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBlaxter2004" class="citation journal cs1">Blaxter, M. L. (2004). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1693355">"The promise of a DNA taxonomy"</a>. <i>Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences</i>. <b>359</b> (1444): 669–679. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1098%2Frstb.2003.1447">10.1098/rstb.2003.1447</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a>&#160;<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1693355">1693355</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/15253352">15253352</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Philosophical+Transactions+of+the+Royal+Society+of+London.+Series+B%2C+Biological+Sciences&amp;rft.atitle=The+promise+of+a+DNA+taxonomy&amp;rft.volume=359&amp;rft.issue=1444&amp;rft.pages=669-679&amp;rft.date=2004&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC1693355%23id-name%3DPMC&amp;rft_id=info%3Apmid%2F15253352&amp;rft_id=info%3Adoi%2F10.1098%2Frstb.2003.1447&amp;rft.aulast=Blaxter&amp;rft.aufirst=M.+L.&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC1693355&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMolecular+phylogenetics" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Molecular_phylogenetics&amp;action=edit&amp;section=9" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/">NCBI – Systematics and Molecular Phylogenetics</a></li> <li><a rel="nofollow" class="external text" href="https://www.megasoftware.net/">MEGA Software</a></li> <li><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.britannica.com/EBchecked/topic/458573/phylogeny">Molecular phylogenetics</a></span> from <i>Encyclopædia Britannica</i>.</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output 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taxonomy</a></li> <li><a href="/wiki/Systematics" title="Systematics">Systematics</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="7" style="width:1px;padding:0 0 0 2px"><div><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Tree_of_life.svg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/09/Tree_of_life.svg/32px-Tree_of_life.svg.png" decoding="async" width="32" height="27" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/09/Tree_of_life.svg/48px-Tree_of_life.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/09/Tree_of_life.svg/64px-Tree_of_life.svg.png 2x" data-file-width="915" data-file-height="760" /></a></span></span><span class="portalbox-link"><a href="/wiki/Portal:Evolutionary_biology" title="Portal:Evolutionary biology">Evolutionary biology portal</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Basic concepts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Phylogenesis" title="Phylogenesis">Phylogenesis</a> <ul><li><a href="/wiki/Cladogenesis" title="Cladogenesis">Cladogenesis</a></li></ul></li> <li><a href="/wiki/Phylogenetic_tree" title="Phylogenetic tree">Phylogenetic tree</a> <ul><li><a href="/wiki/Cladogram" title="Cladogram">Cladogram</a></li></ul></li> <li><a href="/wiki/Phylogenetic_network" title="Phylogenetic network">Phylogenetic network</a></li> <li><a href="/wiki/Long_branch_attraction" title="Long branch attraction">Long branch attraction</a></li> <li><a href="/wiki/Clade" title="Clade">Clade</a> vs <a href="/wiki/Evolutionary_grade" title="Evolutionary grade">Grade</a></li> <li><a href="/wiki/Lineage_(evolution)" title="Lineage (evolution)">Lineage</a> <ul><li><a href="/wiki/Ghost_lineage" title="Ghost lineage">Ghost lineage</a></li></ul></li> <li><a href="/wiki/Ghost_population" title="Ghost population">Ghost population</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Inference methods</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Maximum_parsimony_(phylogenetics)" title="Maximum parsimony (phylogenetics)">Maximum parsimony</a></li> <li><a href="/wiki/Phylogenetic_reconciliation" title="Phylogenetic reconciliation">Phylogenetic reconciliation</a></li> <li>Probabilistic methods <ul><li><a href="/wiki/Maximum_likelihood" class="mw-redirect" title="Maximum likelihood">Maximum likelihood</a></li> <li><a href="/wiki/Bayesian_inference_in_phylogeny" title="Bayesian inference in phylogeny">Bayesian inference</a></li></ul></li> <li><a href="/wiki/Distance_matrices_in_phylogeny" title="Distance matrices in phylogeny">Distance-matrix methods</a> <ul><li><a href="/wiki/Neighbor-joining" class="mw-redirect" title="Neighbor-joining">Neighbor-joining</a></li> <li><a href="/wiki/UPGMA" title="UPGMA">UPGMA</a></li> <li><a href="/wiki/Least_squares_inference_in_phylogeny" title="Least squares inference in phylogeny">Least squares</a></li></ul></li> <li><a href="/wiki/Three-taxon_analysis" title="Three-taxon analysis">Three-taxon analysis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Current topics</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/PhyloCode" title="PhyloCode">PhyloCode</a></i></li> <li><a href="/wiki/DNA_barcoding" title="DNA barcoding">DNA barcoding</a></li> <li><a class="mw-selflink selflink">Molecular phylogenetics</a></li> <li><a href="/wiki/Phylogenetic_comparative_methods" title="Phylogenetic comparative methods">Phylogenetic comparative methods</a></li> <li><a href="/wiki/Phylogenetic_niche_conservatism" title="Phylogenetic niche conservatism">Phylogenetic niche conservatism</a></li> <li><a href="/wiki/Phylogenetic_signal" title="Phylogenetic signal">Phylogenetic signal</a></li> <li><a href="/wiki/List_of_phylogenetics_software" title="List of phylogenetics software">Phylogenetics software</a></li> <li><a href="/wiki/Phylogenomics" title="Phylogenomics">Phylogenomics</a></li> <li><a href="/wiki/Phylogeography" title="Phylogeography">Phylogeography</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Group traits</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Primitive_(phylogenetics)" title="Primitive (phylogenetics)">Primitive</a> <ul><li><a href="/wiki/Plesiomorphy" class="mw-redirect" title="Plesiomorphy">Plesiomorphy</a></li> <li><a href="/wiki/Symplesiomorphy" class="mw-redirect" title="Symplesiomorphy">Symplesiomorphy</a></li></ul></li> <li>Derived <ul><li><a href="/wiki/Synapomorphy" class="mw-redirect" title="Synapomorphy">Apomorphy</a></li> <li><a href="/wiki/Synapomorphy" class="mw-redirect" title="Synapomorphy">Synapomorphy</a></li> <li><a href="/wiki/Autapomorphy" title="Autapomorphy">Autapomorphy</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Group types</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Monophyly" title="Monophyly">Monophyly</a></li> <li><a href="/wiki/Paraphyly" title="Paraphyly">Paraphyly</a></li> <li><a href="/wiki/Polyphyly" title="Polyphyly">Polyphyly</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Nomenclature</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Phylogenetic_nomenclature" title="Phylogenetic nomenclature">Phylogenetic nomenclature</a></li> <li><a href="/wiki/Crown_group" title="Crown group">Crown group</a></li> <li><a href="/wiki/Sister_group" title="Sister group">Sister group</a></li> <li><a href="/wiki/Basal_(phylogenetics)" title="Basal (phylogenetics)">Basal</a></li> <li><a href="/wiki/Supertree" title="Supertree">Supertree</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Phylogenetics" title="Category:Phylogenetics">Category</a></b></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <b><a href="https://commons.wikimedia.org/wiki/Category:Phylogenetics" class="extiw" title="commons:Category:Phylogenetics">Commons</a></b></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Bioinformatics" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Bioinformatics" title="Template:Bioinformatics"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Bioinformatics" title="Template talk:Bioinformatics"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Bioinformatics" title="Special:EditPage/Template:Bioinformatics"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Bioinformatics" style="font-size:114%;margin:0 4em"><a href="/wiki/Bioinformatics" title="Bioinformatics">Bioinformatics</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Databases</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Sequence databases: <a href="/wiki/GenBank" title="GenBank">GenBank</a>, <a href="/wiki/European_Nucleotide_Archive" title="European Nucleotide Archive">European Nucleotide Archive</a>, <a href="/wiki/DNA_Data_Bank_of_Japan" title="DNA Data Bank of Japan">DNA Data Bank of Japan</a> and <a href="/wiki/China_National_GeneBank" title="China National GeneBank">China National GeneBank</a></li> <li>Secondary databases: <a href="/wiki/UniProt" title="UniProt">UniProt</a>, database of protein sequences grouping together <a href="/wiki/UniProt#UniProtKB.2FSwiss-Prot" title="UniProt">Swiss-Prot</a>, <a href="/wiki/UniProt#UniProtKB.2FTrEMBL" title="UniProt">TrEMBL</a> and <a href="/wiki/Protein_Information_Resource" title="Protein Information Resource">Protein Information Resource</a></li> <li>Other databases: <a href="/wiki/BioNumbers" title="BioNumbers">BioNumbers</a>, <a href="/wiki/Protein_Data_Bank" title="Protein Data Bank">Protein Data Bank</a>, <a href="/wiki/Ensembl_genome_database_project" title="Ensembl genome database project">Ensembl</a>, <a href="/wiki/InterPro" title="InterPro">InterPro</a>, <a href="/wiki/KEGG" title="KEGG">KEGG</a>, and <a href="/wiki/Gene_ontology" class="mw-redirect" title="Gene ontology">Gene Ontology</a></li> <li>Specialised genomic databases: <a href="/wiki/Barcode_of_Life_Data_System" title="Barcode of Life Data System">BOLD</a>, <a href="/wiki/Saccharomyces_Genome_Database" title="Saccharomyces Genome Database">Saccharomyces Genome Database</a>, <a href="/wiki/FlyBase" title="FlyBase">FlyBase</a>, <a href="/wiki/VectorBase" title="VectorBase">VectorBase</a>, <a href="/wiki/WormBase" title="WormBase">WormBase</a>, <a href="/wiki/Rat_Genome_Database" title="Rat Genome Database">Rat Genome Database</a>, <a href="/wiki/PHI-base" title="PHI-base">PHI-base</a>, <a href="/wiki/The_Arabidopsis_Information_Resource" title="The Arabidopsis Information Resource">Arabidopsis Information Resource</a>, <a href="/wiki/GISAID" title="GISAID">GISAID</a> and <a href="/wiki/Zebrafish_Information_Network" title="Zebrafish Information Network">Zebrafish Information Network</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Software</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BLAST_(biotechnology)" title="BLAST (biotechnology)">BLAST</a></li> <li><a href="/wiki/Bowtie_(sequence_analysis)" title="Bowtie (sequence analysis)">Bowtie</a></li> <li><a href="/wiki/Clustal" title="Clustal">Clustal</a></li> <li><a href="/wiki/EMBOSS" title="EMBOSS">EMBOSS</a></li> <li><a href="/wiki/HMMER" title="HMMER">HMMER</a></li> <li><a href="/wiki/MUSCLE_(alignment_software)" title="MUSCLE (alignment software)">MUSCLE</a></li> <li><a href="/wiki/Phylogenetic_Assignment_of_Named_Global_Outbreak_Lineages" title="Phylogenetic Assignment of Named Global Outbreak Lineages">PANGOLIN</a></li> <li><a href="/wiki/SAMtools" title="SAMtools">SAMtools</a></li> <li><a href="/wiki/Short_Oligonucleotide_Analysis_Package" title="Short Oligonucleotide Analysis Package">SOAP suite</a></li> <li><a href="/wiki/TopHat_(bioinformatics)" title="TopHat (bioinformatics)">TopHat</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Server: <a href="/wiki/ExPASy" class="mw-redirect" title="ExPASy">ExPASy</a></li> <li><a href="/wiki/Rosalind_(education_platform)" title="Rosalind (education platform)">Rosalind (education platform)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Institutions</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Broad_Institute" title="Broad Institute">Broad Institute</a></li> <li><a href="/wiki/Computational_Biology_Department" class="mw-redirect" title="Computational Biology Department">Computational Biology Department</a> (CBD)</li> <li><a href="/wiki/COSBI" title="COSBI">Microsoft Research - University of Trento Centre for Computational and Systems Biology</a> (COSBI)</li> <li><a href="/wiki/Database_Center_for_Life_Science" title="Database Center for Life Science">Database Center for Life Science</a> (DBCLS)</li> <li><a href="/wiki/DNA_Data_Bank_of_Japan" title="DNA Data Bank of Japan">DNA Data Bank of Japan</a> (DDBJ)</li> <li><a href="/wiki/European_Bioinformatics_Institute" title="European Bioinformatics Institute">European Bioinformatics Institute</a> (EMBL-EBI)</li> <li><a href="/wiki/European_Molecular_Biology_Laboratory" title="European Molecular Biology Laboratory">European Molecular Biology Laboratory</a> (EMBL)</li> <li><a href="/wiki/Flatiron_Institute" title="Flatiron Institute">Flatiron Institute</a></li> <li><a href="/wiki/J._Craig_Venter_Institute" title="J. Craig Venter Institute">J. Craig Venter Institute</a> (JCVI)</li> <li><a href="/wiki/Max_Planck_Institute_of_Molecular_Cell_Biology_and_Genetics" title="Max Planck Institute of Molecular Cell Biology and Genetics">Max Planck Institute of Molecular Cell Biology and Genetics</a> (MPI-CBG)</li> <li><a href="/wiki/National_Center_for_Biotechnology_Information" title="National Center for Biotechnology Information">US National Center for Biotechnology Information</a> (NCBI)</li> <li><a href="/wiki/National_Institute_of_Genetics" title="National Institute of Genetics">Japanese Institute of Genetics</a></li> <li><a href="/wiki/Netherlands_Bioinformatics_Centre" title="Netherlands Bioinformatics Centre">Netherlands Bioinformatics Centre</a> (NBIC)</li> <li><a href="/wiki/Philippine_Genome_Center" title="Philippine Genome Center">Philippine Genome Center</a> (PGC)</li> <li><a href="/wiki/Scripps_Research" title="Scripps Research">Scripps Research</a></li> <li><a href="/wiki/Swiss_Institute_of_Bioinformatics" title="Swiss Institute of Bioinformatics">Swiss Institute of Bioinformatics</a> (SIB)</li> <li><a href="/wiki/Wellcome_Sanger_Institute" title="Wellcome Sanger Institute">Wellcome Sanger Institute</a></li> <li><a href="/wiki/Whitehead_Institute" title="Whitehead Institute">Whitehead Institute</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Organizations</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/African_Society_for_Bioinformatics_and_Computational_Biology" title="African Society for Bioinformatics and Computational Biology">African Society for Bioinformatics and Computational Biology</a> (ASBCB)</li> <li><a href="/wiki/Australia_Bioinformatics_Resource" title="Australia Bioinformatics Resource">Australia Bioinformatics Resource</a> (EMBL-AR)</li> <li><a href="/wiki/EMBnet" title="EMBnet">European Molecular Biology network</a> (EMBnet)</li> <li><a href="/wiki/International_Nucleotide_Sequence_Database_Collaboration" title="International Nucleotide Sequence Database Collaboration">International Nucleotide Sequence Database Collaboration</a> (INSDC)</li> <li><a href="/wiki/International_Society_for_Biocuration" title="International Society for Biocuration">International Society for Biocuration</a> (ISB)</li> <li><a href="/wiki/International_Society_for_Computational_Biology" title="International Society for Computational Biology">International Society for Computational Biology</a> (ISCB) <ul><li><a href="/wiki/International_Society_for_Computational_Biology_Student_Council" title="International Society for Computational Biology Student Council">Student Council</a> (ISCB-SC)</li></ul></li> <li><a href="/wiki/Institute_of_Genomics_and_Integrative_Biology" title="Institute of Genomics and Integrative Biology">Institute of Genomics and Integrative Biology</a> (CSIR-IGIB)</li> <li><a href="/wiki/Japanese_Society_for_Bioinformatics" title="Japanese Society for Bioinformatics">Japanese Society for Bioinformatics</a> (JSBi)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Meetings</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Basel_Computational_Biology_Conference" title="Basel Computational Biology Conference">Basel Computational Biology Conference‎</a> ([BC<sup>2</sup>])</li> <li><a href="/wiki/European_Conference_on_Computational_Biology" title="European Conference on Computational Biology">European Conference on Computational Biology</a> (ECCB)</li> <li><a href="/wiki/Intelligent_Systems_for_Molecular_Biology" title="Intelligent Systems for Molecular Biology">Intelligent Systems for Molecular Biology</a> (ISMB)</li> <li><a href="/wiki/International_Conference_on_Bioinformatics" title="International Conference on Bioinformatics">International Conference on Bioinformatics</a> (InCoB)</li> <li><a href="/wiki/International_Conference_on_Computational_Intelligence_Methods_for_Bioinformatics_and_Biostatistics" title="International Conference on Computational Intelligence Methods for Bioinformatics and Biostatistics">International Conference on Computational Intelligence Methods for Bioinformatics and Biostatistics</a> (CIBB)</li> <li><a href="/wiki/ISCB_Africa_ASBCB_Conference_on_Bioinformatics" title="ISCB Africa ASBCB Conference on Bioinformatics">ISCB Africa ASBCB Conference on Bioinformatics</a></li> <li><a href="/wiki/Pacific_Symposium_on_Biocomputing" title="Pacific Symposium on Biocomputing">Pacific Symposium on Biocomputing</a> (PSB)</li> <li><a href="/wiki/Research_in_Computational_Molecular_Biology" title="Research in Computational Molecular Biology">Research in Computational Molecular Biology</a> (RECOMB)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">File formats</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/CRAM_(file_format)" title="CRAM (file format)">CRAM format</a></li> <li><a href="/wiki/FASTA_format" title="FASTA format">FASTA format</a></li> <li><a href="/wiki/FASTQ_format" title="FASTQ format">FASTQ format</a></li> <li><a href="/wiki/NeXML_format" title="NeXML format">NeXML format</a></li> <li><a href="/wiki/Nexus_file" title="Nexus file">Nexus format</a></li> <li><a href="/wiki/Pileup_format" title="Pileup format">Pileup format</a></li> <li><a href="/wiki/SAM_(file_format)" title="SAM (file format)">SAM format</a></li> <li><a href="/wiki/Stockholm_format" title="Stockholm format">Stockholm format</a></li> <li><a href="/wiki/Variant_Call_Format" title="Variant Call Format">VCF format</a></li> <li><a href="/wiki/General_feature_format" title="General feature format">GFF format</a></li> <li><a href="/wiki/Gene_transfer_format" title="Gene transfer format">GTF format</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Computational_biology" title="Computational biology">Computational biology</a></li> <li><a href="/wiki/List_of_biobanks" title="List of biobanks">List of biobanks</a></li> <li><a href="/wiki/List_of_biological_databases" title="List of biological databases">List of biological databases</a></li> <li><a class="mw-selflink selflink">Molecular phylogenetics</a></li> <li><a href="/wiki/Sequencing" title="Sequencing">Sequencing</a></li> <li><a href="/wiki/Sequence_database" title="Sequence database">Sequence database</a></li> <li><a href="/wiki/Sequence_alignment" title="Sequence alignment">Sequence alignment</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Bioinformatics" title="Category:Bioinformatics">Category</a></b></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, 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