Incipient ring speciation revealed by a migratory divide.
Identifieur interne : 001796 ( Main/Corpus ); précédent : 001795; suivant : 001797Incipient ring speciation revealed by a migratory divide.
Auteurs : Darren E. IrwinSource :
- Molecular ecology [ 1365-294X ] ; 2009.
English descriptors
- KwdEn :
- MESH :
- anatomy & histology : Passeriformes.
- genetics : Passeriformes.
- Animals, Genetic Speciation, Genetics, Population, Geography, Hybridization, Genetic, Phylogeny.
Abstract
Ever since Ernst Mayr (1942) called ring species the 'perfect demonstration of speciation', they have attracted much interest from researchers examining how two species evolve from one. In a ring species, two sympatric and reproductively isolated forms are connected by a long chain of intermediate populations that encircle a geographic barrier. Ring species have the potential to demonstrate that speciation can occur without complete geographic isolation, in contrast to the classic model of allopatric speciation. They also allow researchers to examine the causes of reproductive isolation in the contact zone and to use spatial variation to infer the steps by which speciation occurs. According to the classical definition, a ring species must have (i) gradual variation through a chain of populations connecting two divergent and sympatric forms, and (ii) complete or nearly complete reproductive isolation between the terminal forms. But evolutionary biologists now recognize that the process of speciation might often occur with some periods of geographic contact and hybridization between diverging forms; during these phases, even partial reproductive isolation can limit gene flow and permit further divergence to occur. In this issue Bensch et al. (2009) make an exciting and important contribution by extending the ring species concept to a case in which the divergence is much younger and not yet advanced to full reproductive isolation. Their study of geographic variation in willow warblers (Phylloscopus trochilus; Fig. 1) provides a beautiful example of gradual variation through a ring of populations connecting two forms that are partially reproductively isolated where they meet, possibly due to divergent migratory behaviours of the terminal forms.
DOI: 10.1111/j.1365-294X.2009.04211.x
PubMed: 19457189
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pubmed:19457189Le document en format XML
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Irwin</name><affiliation><nlm:affiliation>Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, BC, Canada V6T 1Z4. irwin@zoology.ubc.ca</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="RBID">pubmed:19457189</idno><idno type="pmid">19457189</idno><idno type="doi">10.1111/j.1365-294X.2009.04211.x</idno><idno type="wicri:Area/Main/Corpus">001796</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">001796</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Incipient ring speciation revealed by a migratory divide.</title><author><name sortKey="Irwin, Darren E" sort="Irwin, Darren E" uniqKey="Irwin D" first="Darren E" last="Irwin">Darren E. Irwin</name><affiliation><nlm:affiliation>Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, BC, Canada V6T 1Z4. irwin@zoology.ubc.ca</nlm:affiliation></affiliation></author></analytic><series><title level="j">Molecular ecology</title><idno type="eISSN">1365-294X</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals (MeSH)</term><term>Genetic Speciation (MeSH)</term><term>Genetics, Population (MeSH)</term><term>Geography (MeSH)</term><term>Hybridization, Genetic (MeSH)</term><term>Passeriformes (anatomy & histology)</term><term>Passeriformes (genetics)</term><term>Phylogeny (MeSH)</term></keywords><keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Passeriformes</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Passeriformes</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Genetic Speciation</term><term>Genetics, Population</term><term>Geography</term><term>Hybridization, Genetic</term><term>Phylogeny</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Ever since Ernst Mayr (1942) called ring species the 'perfect demonstration of speciation', they have attracted much interest from researchers examining how two species evolve from one. In a ring species, two sympatric and reproductively isolated forms are connected by a long chain of intermediate populations that encircle a geographic barrier. Ring species have the potential to demonstrate that speciation can occur without complete geographic isolation, in contrast to the classic model of allopatric speciation. They also allow researchers to examine the causes of reproductive isolation in the contact zone and to use spatial variation to infer the steps by which speciation occurs. According to the classical definition, a ring species must have (i) gradual variation through a chain of populations connecting two divergent and sympatric forms, and (ii) complete or nearly complete reproductive isolation between the terminal forms. But evolutionary biologists now recognize that the process of speciation might often occur with some periods of geographic contact and hybridization between diverging forms; during these phases, even partial reproductive isolation can limit gene flow and permit further divergence to occur. In this issue Bensch et al. (2009) make an exciting and important contribution by extending the ring species concept to a case in which the divergence is much younger and not yet advanced to full reproductive isolation. Their study of geographic variation in willow warblers (Phylloscopus trochilus; Fig. 1) provides a beautiful example of gradual variation through a ring of populations connecting two forms that are partially reproductively isolated where they meet, possibly due to divergent migratory behaviours of the terminal forms.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">19457189</PMID><DateCompleted><Year>2009</Year><Month>07</Month><Day>27</Day></DateCompleted><DateRevised><Year>2009</Year><Month>07</Month><Day>02</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1365-294X</ISSN><JournalIssue CitedMedium="Internet"><Volume>18</Volume><Issue>14</Issue><PubDate><Year>2009</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Molecular ecology</Title><ISOAbbreviation>Mol Ecol</ISOAbbreviation></Journal><ArticleTitle>Incipient ring speciation revealed by a migratory divide.</ArticleTitle><Pagination><MedlinePgn>2923-5</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1365-294X.2009.04211.x</ELocationID><Abstract><AbstractText>Ever since Ernst Mayr (1942) called ring species the 'perfect demonstration of speciation', they have attracted much interest from researchers examining how two species evolve from one. In a ring species, two sympatric and reproductively isolated forms are connected by a long chain of intermediate populations that encircle a geographic barrier. Ring species have the potential to demonstrate that speciation can occur without complete geographic isolation, in contrast to the classic model of allopatric speciation. They also allow researchers to examine the causes of reproductive isolation in the contact zone and to use spatial variation to infer the steps by which speciation occurs. According to the classical definition, a ring species must have (i) gradual variation through a chain of populations connecting two divergent and sympatric forms, and (ii) complete or nearly complete reproductive isolation between the terminal forms. But evolutionary biologists now recognize that the process of speciation might often occur with some periods of geographic contact and hybridization between diverging forms; during these phases, even partial reproductive isolation can limit gene flow and permit further divergence to occur. In this issue Bensch et al. (2009) make an exciting and important contribution by extending the ring species concept to a case in which the divergence is much younger and not yet advanced to full reproductive isolation. Their study of geographic variation in willow warblers (Phylloscopus trochilus; Fig. 1) provides a beautiful example of gradual variation through a ring of populations connecting two forms that are partially reproductively isolated where they meet, possibly due to divergent migratory behaviours of the terminal forms.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Irwin</LastName><ForeName>Darren E</ForeName><Initials>DE</Initials><AffiliationInfo><Affiliation>Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, BC, Canada V6T 1Z4. irwin@zoology.ubc.ca</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2009</Year><Month>05</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Mol Ecol</MedlineTA><NlmUniqueID>9214478</NlmUniqueID><ISSNLinking>0962-1083</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D049810" MajorTopicYN="Y">Genetic Speciation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005828" MajorTopicYN="Y">Genetics, Population</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005843" MajorTopicYN="N">Geography</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006824" MajorTopicYN="N">Hybridization, Genetic</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D046109" MajorTopicYN="N">Passeriformes</DescriptorName><QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010802" MajorTopicYN="N">Phylogeny</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>5</Month><Day>22</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>5</Month><Day>22</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2009</Year><Month>7</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">19457189</ArticleId><ArticleId IdType="pii">MEC4211</ArticleId><ArticleId IdType="doi">10.1111/j.1365-294X.2009.04211.x</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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