Extensive recent secondary contacts between four European white oak species.

Details

Serval ID
serval:BIB_7B28757B0B53
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Extensive recent secondary contacts between four European white oak species.
Journal
New Phytologist
Author(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
Publication state
Published
Issued date
2017
Peer-reviewed
Oui
Volume
214
Number
2
Pages
865-878
Language
english
Abstract
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.

Keywords
interglacial recolonization, Quercus, reproductive isolation, secondary contact, speciation
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2017 18:36
Last modification date
20/08/2019 14:37
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