Predictors of genomic diversity in North American squamates

Comparisons of intraspecific genetic diversity across species can reveal the roles of geography, ecology, and life history in shaping biodiversity. We gathered new and existing mitochondrial sequences and genome-wide nuclear data for 30 North American squamate species sampled in the North American Coastal Plain and Desert Southwest. We showed that nuclear genomic diversity estimates were highly consistent across individuals for some species, while other species showed large differences depending on the locality sampled. Range size was positively correlated with both mitochondrial and nuclear diversity, while other predictors differed for each dataset.

跨物种种内遗传多样性的比较研究，可揭示地理、生态及生活史特征在塑造生物多样性过程中的作用。本研究收集了采自北美沿海平原与美国西南部沙漠区的30种北美有鳞目（Squamata）动物的全新及已发表线粒体序列与全基因组核数据。研究结果表明，部分物种的核基因组多样性估计值在不同个体间高度一致，而另一些物种的估计值则因采样地点的不同存在较大差异。物种分布区面积与线粒体、核遗传多样性均呈正相关，而其余预测因子则因数据集类型不同而存在差异。