Genetic Divergence and Speciation in an Extremely Young Species Flock in Mexico Formed by the Genus Cyprinodon (Cyprinodontidae, Teleostei)
Identifieur interne : 001963 ( Main/Exploration ); précédent : 001962; suivant : 001964Genetic Divergence and Speciation in an Extremely Young Species Flock in Mexico Formed by the Genus Cyprinodon (Cyprinodontidae, Teleostei)
Auteurs : Ulrike Strecker [Allemagne] ; Christian G. Meyer [Allemagne] ; Christian Sturmbauer [Autriche] ; Horst Wilkens [Allemagne]Source :
- Molecular Phylogenetics and Evolution [ 1055-7903 ] ; 1996.
Abstract
The lake Laguna Chichancanab contains one of the evolutionarily youngest species flocks known, composed of five endemic species of the genusCyprinodon.The presumed sister speciesCyprinodon artifronsstill exists in marine coastal habitats. Sequences of the mitochondrial control region were obtained forC. artifrons(genes of 17 individuals sequenced) and for all five endemic species (genes of 32 individuals sequenced). While nine different haplotypes were found inC. artifrons,only a single haplotype was shared with the species from the laguna. Four additional haplotypes were found among the endemics. These four were most closely related to that single haplotype shared withC. artifrons.The deprivation in haplotypes among the endemics points to a small founder population or to bottlenecking. The distribution pattern of overlapping haplotypes in four of the five species suggests incomplete lineage sorting or hybridization among them. Complete reproductive isolation is only assumed for one species,C. maya,in which a single and unique haplotype was found.
Url:
DOI: 10.1006/mpev.1996.0066
Affiliations:
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Meyer</name></author><author><name sortKey="Sturmbauer, Christian" sort="Sturmbauer, Christian" uniqKey="Sturmbauer C" first="Christian" last="Sturmbauer">Christian Sturmbauer</name></author><author><name sortKey="Wilkens, Horst" sort="Wilkens, Horst" uniqKey="Wilkens H" first="Horst" last="Wilkens">Horst Wilkens</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:88E6CFB502105CA5C931DADBA770E1F1A8C5E543</idno><date when="1996" year="1996">1996</date><idno type="doi">10.1006/mpev.1996.0066</idno><idno type="url">https://api.istex.fr/document/88E6CFB502105CA5C931DADBA770E1F1A8C5E543/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000899</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000899</idno><idno type="wicri:Area/Istex/Curation">000897</idno><idno type="wicri:Area/Istex/Checkpoint">000F58</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000F58</idno><idno type="wicri:doubleKey">1055-7903:1996:Strecker U:genetic:divergence:and</idno><idno type="wicri:Area/Main/Merge">001A70</idno><idno type="wicri:Area/Main/Curation">001963</idno><idno type="wicri:Area/Main/Exploration">001963</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Genetic Divergence and Speciation in an Extremely Young Species Flock in Mexico Formed by the Genus Cyprinodon (Cyprinodontidae, Teleostei)</title><author><name sortKey="Strecker, Ulrike" sort="Strecker, Ulrike" uniqKey="Strecker U" first="Ulrike" last="Strecker">Ulrike Strecker</name><affiliation wicri:level="1"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Zoological Institute, Zoological Museum, University of Hamburg, Hamburg, 20146</wicri:regionArea><wicri:noRegion>20146</wicri:noRegion><wicri:noRegion>20146</wicri:noRegion></affiliation></author><author><name sortKey="Meyer, Christian G" sort="Meyer, Christian G" uniqKey="Meyer C" first="Christian G." last="Meyer">Christian G. 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Sequences of the mitochondrial control region were obtained forC. artifrons(genes of 17 individuals sequenced) and for all five endemic species (genes of 32 individuals sequenced). While nine different haplotypes were found inC. artifrons,only a single haplotype was shared with the species from the laguna. Four additional haplotypes were found among the endemics. These four were most closely related to that single haplotype shared withC. artifrons.The deprivation in haplotypes among the endemics points to a small founder population or to bottlenecking. The distribution pattern of overlapping haplotypes in four of the five species suggests incomplete lineage sorting or hybridization among them. 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