采用垂直板型聚丙烯酰胺凝胶电泳测定了三种不同生境的桐花树(Aegicerascorniculatum)种群的遗传多样性和遗传分化。桐花树种和种群水平都维持有较高的遗传变异性 ,观察杂合度分别为 0 .2 52和 0 .2 44,期望杂合度分别为0 .2 66、0 .2 40。种群间遗传分化系数为 0 .12 7,表明总的遗传变异中有 12 .7%来自种群间。种群间遗传距离和遗传一致度均值分别为 0 .0 60和 0 .964,基因流畅 ,Nm =2 .187。Genetic diversity and genetic differentiation of A.corniculatumpopulations in three different habitats were investigated using the assay of vertical slab polyacrylamide gel electrophoresis. The results showed that relatively high level of genetic diversity among species and population level was maintained. Observed heterozygosities at species and population level were 0.252 and 0.244 respectively, and expected heterozygosity were 0.266 and 0.240 respectively. The coefficient of gene differentiation between populations was 0.127, which showed that 12.7% of total heterozygosity came from inter population. The genetic distance and genetic identity between populations were 0.06 and 0.964 respectively. Gene flow was smooth, N m= 2.187.国家教育部博士学科点专项科研基金!资助项目(1999038410号
