The genetic distance of the six populations ranged from 0.0089 to 0.0206 (Table 3). The furthest genetic distance was between the HN and HB populations, while the closestwas between the AH and JX populations.
The pairwise genetic distance within population ranged from 0.0008 to 0.0186, which the furthest was within the HB population and the closest was within CQ population.
The highest fixation index was between the AH and CQ populations (0.8875) and the lowest range was between the SD and JX populations (0.0253).
Among six populations, most of fixation indexes were more than 0.05 except one between the SD population and the HB population (0.0253).
The neutrality tests were conducted (Table 4).
All Tajima’s D values showed that there were not significantly different in populations except the HB population, which was 2.356 (P < 0.01).
While Fu’s Fs index of the AH and SD populations were 3.365 and 11.734, respectively, all shown significantly (P < 0.01).