Allozymes and nDNA markers show different levels of population differentiation in the mussel Mytilus聽edulis on British coasts
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- 作者：Edson Pereira Silva and David Owen Francis Skibinski
- 关键词：Mytilus ; nDNA ; Allozymes ; Population structure ; Balancing selection ; Genetic differentiation
- 刊名：Hydrobiologia
- 出版时间：March, 2009
- 出版年：2009
- 期刊代码：7_00188158
- 类别：et
- 卷：620
- 期：1
- 页码：25-33
- 数据来源：sp
摘要
In order to test the hypothesis that natural selection can be operating on allozymes, six nuclear DNA markers were used to study population structure in six Mytilus edulis (Linnaeus, 1758) populations around the British Isles and the results compared with previous allozyme data from the same (two sites) or very close localities (the other four sites). Allozymes and nDNA markers show significant differentiation between populations at the P < 0.01 level, with the exception of the nDNA marker PLIIa. The results also indicate significant differences (modified version of the Lewontin–Krakauer test) between the two sets of markers which are about one order of magnitude higher for nDNA than for the allozyme loci. The bootstrap analysis was carried out to correct for the possibility that this difference is a sample size artefact. These results are consistent with the operation of balancing selection on allozymes or on loci in linkage disequilibrium with them.