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首页> 外文期刊>Evolutionary Applications >Genomewide evidence of environmentally mediated secondary contact of European green crab (Carcinus maenas) lineages in eastern North America
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Genomewide evidence of environmentally mediated secondary contact of European green crab (Carcinus maenas) lineages in eastern North America

机译：全基因组证据表明，北美东部欧洲青蟹（Carcinus maenas）血统世代环境接触

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Genetic‐environment associations are increasingly revealed through population genomic data and can occur through a number of processes, including secondary contact, divergent natural selection, or isolation by distance. Here, we investigate the influence of the environment, including seasonal temperature and salinity, on the population structure of the invasive European green crab ( Carcinus maenas ) in eastern North America. Green crab populations in eastern North America are associated with two independent invasions, previously shown to consist of distinct northern and southern ecotypes, with a contact zone in southern Nova Scotia, Canada. Using a RAD‐seq panel of 9,137 genomewide SNPs, we detected 41 SNPs (0.49%) whose allele frequencies were highly correlated with environmental data. A principal components analysis of 25 environmental variables differentiated populations into northern, southern, and admixed sites in concordance with the observed genomic spatial structure. Furthermore, a spatial principal components analysis conducted on genomic and geographic data revealed a high degree of global structure ( p.
机译：遗传与环境之间的联系越来越多地通过种群基因组数据揭示出来，并且可以通过许多过程发生，包括二次接触，自然选择差异或距离隔离。在这里，我们调查了包括季节性温度和盐度在内的环境对北美东部入侵欧洲青蟹（Carcinus maenas）种群结构的影响。北美东部的绿蟹种群与两次独立入侵有关，先前已证明是由北部和南部的独特生态型组成，在加拿大新斯科舍省南部具有接触区。使用RAD-seq小组的9137个全基因组SNP，我们检测到41个SNP（0.49％），其等位基因频率与环境数据高度相关。根据观察到的基因组空间结构，对25个环境变量的主成分分析将种群分为北部，南部和混合地点。此外，对基因组和地理数据进行的空间主成分分析显示，高度的全球结构（p。

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