Extensive recent secondary contacts between four European white oak species.

Détails

ID Serval
serval:BIB_7B28757B0B53
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Extensive recent secondary contacts between four European white oak species.
Périodique
New Phytologist
Auteur(s)
Leroy T., Roux C., Villate L., Bodénès C., Romiguier J., Paiva J.A., Dossat C., Aury J.M., Plomion C., Kremer A.
ISSN
1469-8137 (Electronic)
ISSN-L
0028-646X
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
214
Numéro
2
Pages
865-878
Langue
anglais
Résumé
Historical trajectories of tree species during the late Quaternary have been well reconstructed through genetic and palaeobotanical studies. However, many congeneric tree species are interfertile, and the timing and contribution of introgression to species divergence during their evolutionary history remains largely unknown. We quantified past and current gene flow events between four morphologically divergent oak species (Quercus petraea, Q. robur, Q. pyrenaica, Q. pubescens), by two independent inference methods: diffusion approximation to the joint frequency spectrum (∂a∂i) and approximate Bayesian computation (ABC). For each pair of species, alternative scenarios of speciation allowing gene flow over different timescales were evaluated. Analyses of 3524 single nucleotide polymorphisms (SNPs) randomly distributed in the genome, showed that these species evolved in complete isolation for most of their history, but recently came into secondary contact, probably facilitated by the most recent period of postglacial warming. We demonstrated that: there was sufficient genetic differentiation before secondary contact for the accumulation of barriers to gene flow; and current European white oak genomes are a mosaic of genes that have crossed species boundaries and genes impermeable to gene flow.

Mots-clé
interglacial recolonization, Quercus, reproductive isolation, secondary contact, speciation
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2017 19:36
Dernière modification de la notice
08/05/2019 20:48
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