Genetic differentiation of common shrew Sorex araneus populations among different alpine valleys revealed by microsatellites

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Serval ID
serval:BIB_CB89769CE7EB
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Genetic differentiation of common shrew Sorex araneus populations among different alpine valleys revealed by microsatellites
Journal
Acta Theriologica
Author(s)
Lugon-Moulin N., Balloux F., Hausser J.
ISSN
0001-7051
Publication state
Published
Issued date
2000
Peer-reviewed
Oui
Volume
45
Number
Suppl 1
Pages
103-117
Language
english
Abstract
Geographical barriers may affect the genetic structure of populations by reducing gene exchanges among them. In Switzerland, the common shrew Sorer araneus Linnaeus, 1758 is mostly confined to mountainous areas because of a competing sister species, Millet's shrew S. coronatus Millet, 1828, which occupies most of the Swiss lowlands. The structure of common shrew populations found in different alpine valleys may therefore be affected by the topography. Using microsatellites, genetic structuring of seven shrew populations is investigated among four different valleys of, the Swiss Alps. Using the exact G-test, significant genetic structuring is detected between several valleys. Isolation by distance does not fully explain our results. It appears that high mountain ridges (> 2400 m) can significantly reduce gene flow. F- and R-statistics are estimated and compared to the exact G-tests results. Mantel tests show that F-ST, unlike R-ST, is significantly correlated with differentiation. F-ST remains however low even at high differentiation levels, while R-ST has a high variance. We discuss how these results may have wider implications with regards the interpretation of microsatellite data. Finally, a new microsatellite locus, L99, appears to discriminate S. araneus of the Vaud and Cordon races from both S. araneus Valais and S. coronatus.
Keywords
Sorex araneus, microsatellites, exact G-tests, F-statistics, R-statistics, genetic differentiation
Web of science
Create date
24/01/2008 20:02
Last modification date
20/08/2019 16:46
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