Additional molecular support for the new chordate phylogeny. - HAL-SDE - Sciences de l'environnement Accéder directement au contenu
Article Dans Une Revue Genesis Année : 2008

Additional molecular support for the new chordate phylogeny.

Résumé

Recent phylogenomic analyses have suggested tunicates instead of cephalochordates as the closest living relatives of vertebrates. In direct contradiction with the long accepted view of Euchordates, this new phylogenetic hypothesis for chordate evolution has been the object of some skepticism. We assembled an expanded phylogenomic dataset focused on deuterostomes. Maximum-likelihood using standard models and Bayesian phylogenetic analyses using the CAT site-heterogeneous mixture model of amino-acid replacement both provided unequivocal support for the sister-group relationship between tunicates and vertebrates (Olfactores). Chordates were recovered as monophyletic with cephalochordates as the most basal lineage. These results were robust to both gene sampling and missing data. New analyses of ribosomal rRNA also recovered Olfactores when compositional bias was alleviated. Despitethe inclusion of 25 taxa representing all major lineages, the monophyly of deuterostomes remained poorly supported. The implications of these phylogenetic results for interpreting chordate evolution are discussed in light of recent advances from evolutionary developmental biology and genomics. genesis 46:592-604, 2008. (c) 2008 Wiley-Liss, Inc.

Domaines

Evolution
Fichier principal
Vignette du fichier
Delsuc-Genesis08-HAL.pdf (647.46 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

halsde-00338411 , version 1 (13-11-2008)

Identifiants

Citer

Frédéric Delsuc, Georgia Tsagkogeorga, Nicolas Lartillot, Herve Philippe. Additional molecular support for the new chordate phylogeny.. Genesis, 2008, 46 (11), pp.592-604. ⟨10.1002/dvg.20450⟩. ⟨halsde-00338411⟩
363 Consultations
1070 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More