LEROY, Thibault; ROUX, Camille; VILLATE, Laure; BODÉNÈS, Catherine; ROMIGUIER, Jonathan; PAIVA, Jorge A. P.; DOSSAT, Carole; AURY, Jean-Marc; PLOMION, Christophe; KREMER, Antoine

doi:10.1111/nph.14413

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LEROY, Thibault
Biodiversité, Gènes & Communautés [BioGeCo]

ROUX, Camille
Department of Ecology and Evolution [UNIL, Lausanne] = Département d'écologie et évolution [DEE]

VILLATE, Laure
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

New Phytologist. 2017, vol. 214, n° 2, p. 865-878

Wiley

Résumé en anglais

*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.< Réduire

Mots clés

quaternaire

analyse génétique

paléobotanique

calcul bayésien

interfertilité

flux de gènes

arbre forestier

quercus petraea

quercus pyrenaica

quercus robur

quercus pubescens

polymorphisme nucléotidique simple (SNP)

congènere

Mots clés en anglais

genetical analysis

paleobotany

bayesian method

forest tree

sessile oak

pedunculate oak

DOI

http://dx.doi.org/10.1111/nph.14413

Projet Européen

From Holocene to Anthropocene: the pace of microevolution in trees
EVOLution of TREEs as drivers of terrestrial biodiversity
The creation of the Department of INTEGRATIVE PLANT BIOLOGY

Project ANR

Séquençage du génome du chêne et identification de gènes d'intérêt adaptatifs chez les arbres forestiers - ANR-11-BSV6-0009
Organisation et montée en puissance d'une Infrastructure Nationale de Génomique

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202