EXCOFFIER, Laurent; FOLL, Matthieu; PETIT, Remy

doi:10.1146/annurev.ecolsys.39.110707.173414

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EXCOFFIER, Laurent
Universität Bern = University of Bern = Université de Berne [UNIBE]
Swiss Institute of Bioinformatics [Lausanne] [SIB]

FOLL, Matthieu
Universität Bern = University of Bern = Université de Berne [UNIBE]
Swiss Institute of Bioinformatics [Lausanne] [SIB]

PETIT, Remy
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

Annual Review of Ecology, Evolution, and Systematics. 2009, vol. 40, p. 481-501

Annual Reviews

Résumé en anglais

Although range expansions have occurred recurrently in the history of most species, their genetic consequences have been little investigated. Theoretical studies show that range expansions are quite different from pure demographic expansions and that the extent of recent gene flow conditions expected patterns of molecular diversity within and between populations. Spatially explicit simulation studies have led to unexpected and fascinating results about genetic patterns emerging after a range expansion. For instance, spatial expansions can generate allele frequency gradients, promote the surfing of rare variants into newly occupied territories, induce the structuring of newly colonized areas into distinct sectors of low genetic diversity, or lead to massive introgression of local genes into the genome of an invading species. Interestingly, most of these patterns had been previously attributed to distinct selective processes, showing that taking into account the dynamic nature of a species range can lead to a paradigm shift in our perception of evolutionary processes.< Réduire

Mots clés

BIOINVASION

COALESCENT SIMULATIONS

RANGE EXPANSION

RÉPARTITION SPATIALE

Mots clés en anglais

INTROGRESSION

LONG-RANGE DISPERSAL

SURFING