Phylogenomics Controlling for Base Compositional Bias Reveals a Single Origin of Eusociality in Corbiculate Bees.

Détails

Ressource 1Télécharger: BIB_C486DE4D308E.P001.pdf (367.44 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_C486DE4D308E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Phylogenomics Controlling for Base Compositional Bias Reveals a Single Origin of Eusociality in Corbiculate Bees.
Périodique
Molecular biology and evolution
Auteur(s)
Romiguier J., Cameron S.A., Woodard S.H., Fischman B.J., Keller L., Praz C.J.
ISSN
1537-1719 (Electronic)
ISSN-L
0737-4038
Statut éditorial
Publié
Date de publication
03/2016
Peer-reviewed
Oui
Volume
33
Numéro
3
Pages
670-678
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
As increasingly large molecular data sets are collected for phylogenomics, the conflicting phylogenetic signal among gene trees poses challenges to resolve some difficult nodes of the Tree of Life. Among these nodes, the phylogenetic position of the honey bees (Apini) within the corbiculate bee group remains controversial, despite its considerable importance for understanding the emergence and maintenance of eusociality. Here, we show that this controversy stems in part from pervasive phylogenetic conflicts among GC-rich gene trees. GC-rich genes typically have a high nucleotidic heterogeneity among species, which can induce topological conflicts among gene trees. When retaining only the most GC-homogeneous genes or using a nonhomogeneous model of sequence evolution, our analyses reveal a monophyletic group of the three lineages with a eusocial lifestyle (honey bees, bumble bees, and stingless bees). These phylogenetic relationships strongly suggest a single origin of eusociality in the corbiculate bees, with no reversal to solitary living in this group. To accurately reconstruct other important evolutionary steps across the Tree of Life, we suggest removing GC-rich and GC-heterogeneous genes from large phylogenomic data sets. Interpreted as a consequence of genome-wide variations in recombination rates, this GC effect can affect all taxa featuring GC-biased gene conversion, which is common in eukaryotes.

Mots-clé
Animals, Base Composition, Bees/classification, Bees/genetics, Evolution, Molecular, Genes, Insect, Genetic Heterogeneity, Genome, Insect, Genomics, Models, Genetic, Phylogeny
Pubmed
Open Access
Oui
Création de la notice
03/11/2015 14:38
Dernière modification de la notice
09/05/2019 0:57
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