Genetic bottlenecks driven by population disconnection.

Détails

ID Serval
serval:BIB_E498E4BEE16F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genetic bottlenecks driven by population disconnection.
Périodique
Conservation Biology
Auteur(s)
Broquet T., Angelone S., Jaquiery J., Joly P., Lena J.P., Lengagne T., Plenet S., Luquet E., Perrin N.
ISSN
1523-1739[electronic], 0888-8892[linking]
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
24
Numéro
6
Pages
1596-1605
Langue
anglais
Résumé
Connectivity among populations plays a crucial role in maintaining genetic variation at a local scale, especially in small populations affected strongly by genetic drift. The negative consequences of population disconnection on allelic richness and gene diversity (heterozygosity) are well recognized and empirically established. It is not well recognized, however, that a sudden drop in local effective population size induced by such disconnection produces a temporary disequilibrium in allelic frequency distributions that is akin to the genetic signature of a demographic bottleneck. To document this effect, we used individual-based simulations and empirical data on allelic richness and gene diversity in six pairs of isolated versus well-connected (core) populations of European tree frogs. In our simulations, population disconnection depressed allelic richness more than heterozygosity and thus resulted in a temporary excess in gene diversity relative to mutation drift equilibrium (i.e., signature of a genetic bottleneck). We observed a similar excess in gene diversity in isolated populations of tree frogs. Our results show that population disconnection can create a genetic bottleneck in the absence of demographic collapse.
Mots-clé
allelic richness, bottleneck, connectivity, European tree frog, gene diversity, Hyla arborea, isolation, aislamiento, conectividad, cuello de botella, diversidad genetica, Hyla arborea, riqueza alelica
Pubmed
Web of science
Création de la notice
27/05/2010 8:49
Dernière modification de la notice
03/03/2018 22:14
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