Peak and persistent excess of genetic diversity following an abrupt migration increase.

Détails

ID Serval
serval:BIB_618695282245
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Peak and persistent excess of genetic diversity following an abrupt migration increase.
Périodique
Genetics
Auteur(s)
Alcala N., Streit D., Goudet J., Vuilleumier S.
ISSN
1943-2631 (Electronic)
ISSN-L
0016-6731
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
193
Numéro
3
Pages
953-971
Langue
anglais
Résumé
Genetic diversity is essential for population survival and adaptation to changing environments. Demographic processes (e.g., bottleneck and expansion) and spatial structure (e.g., migration, number, and size of populations) are known to shape the patterns of the genetic diversity of populations. However, the impact of temporal changes in migration on genetic diversity has seldom been considered, although such events might be the norm. Indeed, during the millions of years of a species' lifetime, repeated isolation and reconnection of populations occur. Geological and climatic events alternately isolate and reconnect habitats. We analytically document the dynamics of genetic diversity after an abrupt change in migration given the mutation rate and the number and sizes of the populations. We demonstrate that during transient dynamics, genetic diversity can reach unexpectedly high values that can be maintained over thousands of generations. We discuss the consequences of such processes for the evolution of species based on standing genetic variation and how they can affect the reconstruction of a population's demographic and evolutionary history from genetic data. Our results also provide guidelines for the use of genetic data for the conservation of natural populations.
Pubmed
Web of science
Open Access
Oui
Création de la notice
07/01/2013 16:08
Dernière modification de la notice
20/08/2019 15:18
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