Turnover and accumulation of genetic diversity across large time-scale cycles of isolation and connection of populations.

Détails

ID Serval
serval:BIB_45120AFA6DBE
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Turnover and accumulation of genetic diversity across large time-scale cycles of isolation and connection of populations.
Périodique
Proceedings of the Royal Society B Biological Sciences
Auteur(s)
Alcala N., Vuilleumier S.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
2014
Volume
281
Numéro
1794
Pages
20141369
Langue
anglais
Résumé
Major climatic and geological events but also population history (secondary contacts) have generated cycles of population isolation and connection of long and short periods. Recent empirical and theoretical studies suggest that fast evolutionary processes might be triggered by such events, as commonly illustrated in ecology by the adaptive radiation of cichlid fishes (isolation and reconnection of lakes and watersheds) and in epidemiology by the fast adaptation of the influenza virus (isolation and reconnection in hosts). We test whether cyclic population isolation and connection provide the raw material (standing genetic variation) for species evolution and diversification. Our analytical results demonstrate that population isolation and connection can provide, to populations, a high excess of genetic diversity compared with what is expected at equilibrium. This excess is either cyclic (high allele turnover) or cumulates with time depending on the duration of the isolation and the connection periods and the mutation rate. We show that diversification rates of animal clades are associated with specific periods of climatic cycles in the Quaternary. We finally discuss the importance of our results for macroevolutionary patterns and for the inference of population history from genomic data.
Mots-clé
migration, population subdivision, secondary contact, diversification
Pubmed
Web of science
Open Access
Oui
Création de la notice
17/04/2015 7:48
Dernière modification de la notice
08/05/2019 17:52
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