A microsatellite study in the ??gucki M?yn/Popielno hybrid zone reveals no genetic differentiation between two chromosome races of the common shrew (Sorex araneus)
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- 作者：Magdalena Moska (1)
Heliodor Wierzbicki (1)
Anna Macierzyńska (1)
Tomasz Strza?a (1)
Robert Ma?lak (2)
Marcin Warcha?owski (1) - 关键词：DNA polymorphism ; Gene flow ; Genetic structure ; Microsatellites ; Sorex araneus
- 刊名：Acta Theriologica
- 出版年：2011
- 出版时间：April 2011
- 年：2011
- 卷：56
- 期：2
- 页码：117-122
- 全文大小：187KB
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Heliodor Wierzbicki (1)
Anna Macierzyńska (1)
Tomasz Strza?a (1)
Robert Ma?lak (2)
Marcin Warcha?owski (1)
1. Department of Genetics and Animal Breeding, Wroc?aw University of Environmental and Life Sciences, Ko?uchowska 7, 51-631, Wroc?aw, Poland
2. Institute of Zoology, Wroc?aw University, Sienkiewicza 21, 50-335, Wroc?aw, Poland
文摘
This study investigated a chromosome hybrid zone between two chromosomal races of the common shrew (Sorex araneus). Gene flow and genetic structure of the hybrid zone, located in the northeast of Poland, were studied using seven polymorphic autosomal microsatellite loci (L9, L14, L33, L45, L67, L68, L97) and a Y-linked microsatellite locus (L8Y). Seventy-five animals (46 of the ??gucki M?yn race and 29 of the Popielno race) from nine different localities were examined and the data were analyzed using hierarchical AMOVA and F-statistic. The studied microsatellite loci and races (divided into nine geographical populations) were characterized by observed heterozygosity (H O), expected heterozygosities within (H S), and between (H T) populations, inbreeding coefficient (F IS), fixation index (F ST), and average allelic richness (A). We found that genetic structuring within and between the two chromosome races were weak and non-significant. This finding and unconstrained gene flow between the races indicates a high level of migration within the ??gucki M?yn/Popielno hybrid zone, suggesting that evolutionarily important genetic structuring does not occur in interracial zones where races which are not genetically distinct come into contact.