Genetic and karyotypic structure of a hybrid zone between the chromosomal races Cordon and Valais in the common shrew, Sorex araneus

Details

Serval ID
serval:BIB_E319C3FD5D3C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Genetic and karyotypic structure of a hybrid zone between the chromosomal races Cordon and Valais in the common shrew, Sorex araneus
Journal
Hereditas
Author(s)
Brunner H., Hausser J.
ISSN
0018-0661
Publication state
Published
Issued date
1996
Peer-reviewed
Oui
Volume
125
Number
2-3
Pages
147-158
Language
english
Abstract
Hybrid zones between genetically differentiated populations provide material to study evolutionary processes. Since the discovery of chromosomal races in Sorex araneus, contact zones have attracted attention of scientists. So far, studies on genetic markers in Sorex hybrid zones are missing. The acrocentric chromosomal race Cordon and the highly metacentric race Valais meet and hybridize at Les Houches in the Western Alps. On a transect through the hybrid zone, 273 shrews were caught at 15 localities over 4 years. Karyotype as well as the nuclear protein loci Alb and Pg were analyzed. F-st and F-is values were calculated by F-statistics. An analysis on pooled samples revealed the genetical differences between the hybridizing races as the only cause of population structuring. Genetical markers show dines with very strong frequency shifts at a mountain torrent, but behave differently through the zone. The performance of the torrent in maintaining the hybrid zone, selection against hybrids, possible assortative mating and linkage of the Valais Pg allele to a diagnostic chromosome arm, are discussed.
Web of science
Open Access
Yes
Create date
24/01/2008 19:02
Last modification date
20/08/2019 16:06
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