山西高原油松种群遗传多样性

用酸性聚丙烯酰胺凝胶电泳（A-PAGE）技术，分析了山西高原9个油松种群在醇溶蛋白水平上的遗传多样性。135份材料共分离出23条带，其中3条为共有带，多态性高达86．95％。全部材料共出现53种带型，9个不同油松种群的带型有差异，同一种群不同个体的带型也有所不同，说明山西高原的油松在遗传上已产生一定程度分化，在醇溶蛋白水平上呈现出遗传多态性。从供试材料的带型计算出油松遗传分化系数为0．1547。即在种群间的变异占总变异的15．47％，种群内变异为84．53％，大部分的遗传变异存在于种群内，但种群间的分化程度在松属树种中也属于较高水平。根据23个多态位点计算遗传相似系数和遗传距离，进行聚类分析，将山西高原9个油松种群聚为3个类群。

Genetic diversity of populations of Chinese pine (Pinus tabulaeformis Carr.) in Shanxi plateau

Genetic diversity of prolamins in 135 samples of 9 populations of Chinese pine(Pinus tabulaeformis) in Shanxi Plateau was investigated by using acidic polyacrylamide gel electrophoresis(A-PAGE) technique.A total of 23 bands were identified,in which 3 bands were common bands.The percentage of polymorphic loci reached up to 86.95%.The differentiation coefficient of Pinus populations was 0.154 7,which was calculated from the band types of prolamins of samples.Variations in inter-population account for 15.47% in general variations,while variation in intra-population account for 84.53% in general variation.Most of genetic variation occur in intra-population,however the level of genetic differentiation in inter-population of Pinus is relative high.The re-sults of clustering analysis using the genetic similarity coefficient of 23 polymorphic loci indicated that 9 populations of Chinese pine could be divided into three groups in the point of genetic distance 1.114 0.