Abstract:Abstracts:Genetic diversity and genetic variation of Quercus variabilis Blume.of natural populations of Changyang were studied at the enzyme leve1.The results showed that 7 loci and 15 alleles were detected, of which 5 loci were exhibited polymorphism. Percentage of polymorphic loci (that is P) was equal to 71.4%, the average number of alleles per locus (that is A) was equal to 3.200 0, the average number of effective alleles per locus (that is AE) was equal to 1.609 0, the expected heterozygosis (that is HE)was equal to 0.356 3, and the observed heterozygosis (that is HO)was equal to 0.362 5.The genetic diversity and genetic variation of Quercus variabilis Blume. of natural populations of Changyang were high.