Migration/selection balance and ecotypic differentiation in the mosquito Culex pipiens
Migration/selection balance and ecotypic differentiation in the mosquito Culex pipiens
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DOI：
10.1046/j.1365-294x.1998.00338.x
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发表时间：
1998-02-01
影响因子：
4.9
通讯作者：
Pasteur, N
中科院分区：
文献类型：
--
作者：
Chevillon, C;Rivet, Y;Pasteur, N
生态型分化在尖音库蚊中有很好的描述，将在地下和人为场所（地下栖息地）繁殖的种群与在露天场所（地上栖息地）繁殖的种群分开。在Aat-1基因座观察到的种群分化模式已被怀疑与这种生态型分化通过生境依赖的选择，但这种假设仍然是在文献中的辩论的主题。我们分析了分化模式Aat-1和其他四个位点的两个栖息地类型在法国阿尔卑斯山的人口。我们发现，Aat-1（A）等位基因是有利于在低海拔的栖息地，但选择反对在地上栖息地。我们的研究结果与文献中报道的其他数据的比较表明，Aat-1（A）等位基因通常是在生境差异选择下进化的，但决定平衡等位基因频率的迁移和选择的精确平衡在欧洲各地差异很大。这种栖息地依赖的选择，其产生的（地理上不同的）平衡点的性质，讨论了这种蚊子的生物学。
Ecotypic differentiation is well described in the mosquito Culex pipiens, separating populations breeding in subterranean and human-made sites (hypogeous habitat) from those in open-air sites (epigeous habitat). The pattern of population differentiation observed at the Aat-1 locus has been suspected to be associated with such ecotypic differentiation via habitat-dependent selection, but this supposition is still the subject of debate in the literature. We analysed differentiation patterns for Aat-1 and another four loci among populations from both habitat types in the French Alps. We showed that the Aat-1(A) allele is favoured within hypogeous habitats but selected against within epigeous habitats. Comparisons of our results with other data reported in the literature indicate that the Aat-1(A) allele is generally evolving under habitat-differential selection, but that the precise balance of migration and selection that determines equilibrium allele frequencies varies greatly across Europe. The nature of this habitat-dependent selection, and its resulting (geographically varying) equilibrium point, are discussed in relation to the biology of this mosquito species.