The standard genetic distance (DS) and Nei's unbiased genetic distance (DA) of pairwise comparisons among the seven populations.

“upper triangle”, Nei's standard genetic distance (DS); “lower triangle”: Nei's genetic distance (DA). The seven populations were named by their sampled locations, Beijing, Hubei, Hebei, Henan, Jiangsu, Shandong, and Shanxi, respectively.The standard genetic distance (DS) and Nei's unbiased genetic distance (DA) of pairwise comparisons among the seven populations.

遗传距离矩阵的上三角区域为Nei标准遗传距离（Nei's standard genetic distance, DS），下三角区域为Nei遗传距离（Nei's genetic distance, DA）。七个种群依据其采样地点依次命名为北京、湖北、河北、河南、江苏、山东及山西。本数据集涵盖上述七个种群间所有两两比对组合的标准遗传距离（DS）与Nei无偏遗传距离（DA）。