我国特有植物缙云卫矛同功酶变异的数量分析

Numerical analyses of isozymic variation on Euonymus chloranthoides Yang that endemic to chongqing, China

研究了分布于重庆市的我国特有植物———缙云卫矛 7个居群 91个个体功能叶片的过氧化物酶、细胞色素氧化酶、超氧化物歧化酶、酯酶和淀粉酶同工酶谱带的变异式样 ,用Jaccard结合系数的UPGMA法进行聚类分析和主成分分析 ,结果表明 :1 0 .81 %的同工酶谱带是恒定的 ,89.1 9%的同工酶谱带在个体间表现出或多或少的变异 ;居群有 2 9.73 %的同工酶谱带是恒定的 ,70 .2 7%的同工酶谱带在居群间存在着一定程度的分化。来自同一居群的个体在谱带上表现出极大的相似性 ,而来源于不同居群的个体却表现出明显的趋异性 ,这可能是环境因子作用的结果或者是由于不同地域间基因流阻断所致。

The peroxidase,cytochromeoxidase,superoxidase dismutase,esterase and amylase in leaves of 91 plants from 7 populations with different habitats of Euonymus chloranthoides Yang that endemic to Chongqing,China were studied by using electrophoretic technique. The bands of those allozymes are scored to construct the two-state data matrix that is calculated by the Jaccard association coefficients clustered by UPGMA and principis component analysis(PCA). The results show that 10.81% allozyme bands are permanent to all the individuals and the other 89.19% allozyme bands show more or less variation among populations. About 29.73% allozyme bands are permanent to populations and the other 70.27% allozyme bands differentiated among populations. The results of clustering analysis and PCA indicate that individuals from the same population are highly homogenous genetically,which individuals from the different populations show highly dissimilarities in those allozyme bands. It may be either the result from environmental factors or the isolation of gene flow.