山东板栗遗传多样性分析

利用29对SSR引物对26份山东主栽板栗品种进行遗传多样性分析,以了解山东板栗的遗传多样性分布情况,为种质资源的利用和开发提供依据。结果表明,SSR的遗传多样性指数的分布范围为1．2720～2．9500,Simpson指数分布范围为0．5517～0．9409。可见,山东板栗具有丰富的遗传变异。根据系统聚类分析将26个板栗品种分为3大类。同时在3大类内又将品种进行细分,第Ⅰ类全部为胶东地区的材料,第Ⅱ类为鲁中南地区和泰沂山区的材料,分为3个亚类,第Ⅲ类只含有8019份材料,其结果说明山东的3个板栗主产区内部的品种或种质间亲缘关系较近,鲁中南地区和泰沂山区的品种或种质间可能有共同的起源。

A study of genetic diversity of Castanea mollissima in shandong

The genetic diversity of 26 chestnut cultivars grown in Shandong was evaluated through 29 pairs of SSR primers. The aim was to reveal their genetic diversity and to exploit and make use of the germplasm of Castanea. mollissima. The results showed that the Shannon-weaver index of genetic diversity ranged from 1.2720 to 2.9500 and the Simpson index 0.5517 to 0.9409,which indicated that the C. mollissima in Shandong has high genetic diversity. The 26 cultivars used in this study were divided into 3 groups by cluster analysis and the materials were subdivided by variety in each group. Group I included all the cultivars in east of Shandong, Group II included the materials in the mid-south Shandong and Tai-Yi mountainous region, which were divided into 3 subgroups, and Group III comprised only one cultivar of number 8019, which showed that the varieties or cultivars of the 3 main chestnut producing areas in Shandong had closer kinship and those of the mid-south Shandong and Tai-Yi mountainous region may had common origin.