Phenotypic differentiation despite gene flow: Beak morphology, bite performance, and population genetics of Loggerhead Shrikes ( Lanius ludovicianus )
Phenotypic differentiation despite gene flow: Beak morphology, bite performance, and population genetics of Loggerhead Shrikes ( Lanius ludovicianus )
复制标题
尽管基因流仍存在表型分化：红头伯劳 (Lanius ludovicianus) 的喙形态、咬合性能和群体遗传学
DOI：
10.1002/ece3.11079
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发表时间：
2024
影响因子：
2.6
通讯作者：
Sethuraman, Arun
中科院分区：
文献类型：
--
作者：
Sustaita, Diego;Wulf, Gwendalyn K.;Sethuraman, Arun
以往的研究表明，在北美的Loggerhead伯劳（伯劳科：伯劳ludovicianus）相当大的种内遗传和表型分化，但遗传和表型分化之间的一致性仍然模糊。我们研究了从帝王谷下游到美国加州中央谷上游的950公里范围内的地理群体之间喙形和咬合力的表型差异。我们将这些分析与6个微卫星标记的群体遗传分析相结合，以测试地理群体之间表型和遗传差异之间的对应关系。我们发现显着的表型分化，尽管缺乏显着的群体间的遗传分化。成对的喙形状和咬合力的距离，但与地理群体之间的遗传（FST）的距离。此外，表型和遗传距离矩阵与成对的地理距离相关。总的来说，这些结果表明，表型差异可能受到中性过程，近亲繁殖（如我们观察到的高杂合性缺陷所示），局部适应和/或表型可塑性的影响。
Previous studies of Loggerhead Shrikes (Laniidae:Lanius ludovicianus) in North America have indicated considerable intraspecific genetic and phenotypic differentiation, but the congruence between genetic and phenotypic differentiation remains obscure. We examined phenotypic differences in beak shape and bite force among geographic groupings across a 950 km range, from the lower Imperial Valley to the upper Central Valley of California, USA. We integrated these analyses with a population genetic analysis of six microsatellite markers to test for correspondence between phenotypic and genetic differences among geographic groups. We found significant phenotypic differentiation despite a lack of significant genetic differentiation among groups. Pairwise beak shape and bite force distances nevertheless were correlated with genetic (FST) distances among geographic groups. Furthermore, the phenotypic and genetic distance matrices were correlated with pairwise geographic distances. Takentogether, these results suggest that phenotypic differences might be influenced by neutral processes, inbreeding (as indicated by high heterozygosity deficiencies we observed), local adaptation, and/or phenotypic plasticity.