Population Genetics and Morphological Comparisons of Migratory European (Hirundo rustica rustica) and Sedentary East-Mediterranean (Hirundo rustica transitiva) Barn Swallows
Population Genetics and Morphological Comparisons of Migratory European (Hirundo rustica rustica) and Sedentary East-Mediterranean (Hirundo rustica transitiva) Barn Swallows
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DOI：
10.1093/jhered/esr114
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发表时间：
2012-01-01
影响因子：
3.1
通讯作者：
Lovette, Irby J.
中科院分区：
文献类型：
--
作者：
Dor, Roi;Safran, Rebecca J.;Lovette, Irby J.
物种形成过程很大程度上取决于发散选择的相对强度与基因流大小的关系。家燕 (Hirundo rustica) 具有广泛的地理分布，其形态和行为存在巨大的地理差异。欧洲亚种 (H. r. rustica) 和东地中海亚种 (H. r.transitiva) 密切相关，尽管形态和生活史特征有所不同。为了探索遗传分化和基因流的模式，我们比较了 H. r. 非迁徙繁殖群体的形态和遗传变异。来自以色列的transitiva 和H. r. 的移民人口。 rustica 穿过以色列，并将其与 H. r. 之间的遗传分化进行比较。来自以色列的transitiva和H. r.的繁殖种群来自英国的 rustica 使用不同的迁徙路线。线粒体单倍型网络分析表明，欧洲和东地中海种群是混合的，尽管基于线粒体（F-ST = 0.025-0.033）和微卫星（F-ST = 0.009-0.014）位点的亚种之间存在较低但显着的遗传分化。基于聚结的分析表明，尽管这些种群在形态和行为特征上存在差异，但最近它们之间存在分歧和大量基因流动。结果表明，面对基因流，这些亚种正在经历分化过程，选择可能对性选择特征进行操作。
Speciation processes are largely determined by the relative strength of divergent selection versus the magnitude of gene flow. The barn swallow (Hirundo rustica) has a broad geographic distribution that encompasses substantial geographic variation in morphology and behavior. The European (H. r. rustica) and East-Mediterranean (H. r. transitiva) subspecies are closely related, despite differing in morphological and life-history traits. To explore patterns of genetic differentiation and gene flow, we compared morphological and genetic variation among the nonmigratory breeding population of H. r. transitiva from Israel and the migratory population of H. r. rustica that passes through Israel and compared it with the genetic differentiation between H. r. transitiva from Israel and a breeding population of H. r. rustica from the United Kingdom that uses a different migratory flyway. Mitochondrial haplotype network analysis suggests that the European and East-Mediterranean populations are intermixed, although there was low but significant genetic differentiation between the subspecies based on both mitochondrial (F-ST = 0.025-0.033) and microsatellite (F-ST = 0.009-0.014) loci. Coalescent-based analyses suggest recent divergence and substantial gene flow between these populations despite their differences in morphological and behavioral traits. The results suggest that these subspecies are undergoing a differentiation process in the face of gene flow, with selection possibly operating on sexually selected traits.