Table 7. The standard genetic distance (D_S) and Nei's unbiased genetic distance (D_A) of pairwise comparisons among the seven populations.

	Beijing	Hubei	Hebei	Henan	Jiangsu	Shandong	Shanxi
Beijing	—	1.0144	0.0890	0.5421	0.9047	0.5294	0.8219
Hubei	0.7344	—	0.8859	0.5784	1.0331	0.6196	0.8590
Hebei	0.1914	0.6757	—	0.4638	0.7195	0.4123	0.4870
Henan	0.5674	0.7286	0.5835	—	0.5557	0.1233	0.3740
Jiangsu	0.5864	0.7111	0.5447	0.5470	—	0.2811	0.7536
Shandong	0.5050	0.7147	0.4976	0.3532	0.3294	—	0.4354
Shanxi	0.5382	0.6810	0.3746	0.5354	0.5196	0.5318	—

“upper triangle”, Nei's standard genetic distance (D_S); “lower triangle”: Nei's genetic distance (D_A). The seven populations were named by their sampled locations, Beijing, Hubei, Hebei, Henan, Jiangsu, Shandong, and Shanxi, respectively.