Genetic bottlenecks driven by population disconnection.

Details

Serval ID
serval:BIB_E498E4BEE16F
Type
Article: article from journal or magazin.
Collection
Publications
Title
Genetic bottlenecks driven by population disconnection.
Journal
Conservation Biology
Author(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]
Publication state
Published
Issued date
2010
Peer-reviewed
Oui
Volume
24
Number
6
Pages
1596-1605
Language
english
Abstract
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.
Keywords
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
Create date
27/05/2010 8:49
Last modification date
20/08/2019 17:08
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