**3.4 The influence of ecological factors on the genetic diversity of 5 sub-populations of**  *D. punctatus tabulaeformis*

The population genetic variability and genetic structure of 5 sub-populations of *D. punctatus tabulaeformis* in Pingquan city, Hebei province were analyzed using SSR. The influence of ecological factors on the genetic diversity is also discussed by the correlation analysis. The genetic index has positive relation with ecological factors weakly. The genetic index has positive relationship with ecological factors but not significant(table42). Stand type, slope, aspect and altitude were the main traits account for the genetic diversity according to the Principal Component Analysis (PCA).


Note:\*P<0.05, \*\*P<0.01, \*\*\*P<0.001 *A*: Number of alleles per locus; *Ae*: Effective number of alleles per locus; *I*: The Shannon information index; *Ho*: Observed heterozygosity; *He*: Expected heterozygosity; *P*: Percentage of polyporphic loci

Table 42. Correlation of genetic diversity and the ecological factors of five sub-populations of *D. punctatus tabulaeformis*
