Hybridisation and diversification in the adaptive radiation of clownfishes.

Détails

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_250CBA90602A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Hybridisation and diversification in the adaptive radiation of clownfishes.
Périodique
BMC Evolutionary Biology
Auteur(s)
Litsios G., Salamin N.
ISSN
1471-2148 (Electronic)
ISSN-L
1471-2148
Statut éditorial
Publié
Date de publication
2014
Volume
14
Numéro
1
Pages
245
Langue
anglais
Résumé
BackgroundThe importance of hybridisation during species diversification has long been debated among evolutionary biologists. It is increasingly recognised that hybridisation events occurred during the evolutionary history of numerous species, especially during the early stages of adaptive radiation. We study the effect of hybridisation on diversification in the clownfishes, a clade of coral reef fish that diversified through an adaptive radiation process. While two species of clownfish are likely to have been described from hybrid specimens, the occurrence and effect of hybridisation on the clade diversification is yet unknown.ResultsWe generate sequences of three mitochondrial genes to complete an existing dataset of nuclear sequences and document cytonuclear discordance at a node, which shows a drastic increase of diversification rate. Then, using a tree-based jack-knife method, we identify clownfish species likely stemming from hybridisation events. Finally, we use molecular cloning and identify the putative parental species of four clownfish specimens that display the morphological characteristics of hybrids.ConclusionsOur results show that consistently with the syngameon hypothesis, hybridisation events are linked with a burst of diversification in the clownfishes. Moreover, several recently diverged clownfish lineages likely originated through hybridisation, which indicates that diversification, catalysed by hybridisation events, may still be happening.
Mots-clé
Syngameon, Speciation, Diversification, Cytonuclear discordance, Anemonefish
Pubmed
Web of science
Open Access
Oui
Création de la notice
03/12/2014 11:27
Dernière modification de la notice
20/08/2019 13:03
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