论文部分内容阅读
利用 2 4个SSR标记对 8份四川小麦地方品种和 8份主栽品种的遗传多样性进行比较研究。结果表明 ,在 2 4个SSR标记位点上共检测到 75个等位变异 ,每一位点检测到的等位变异数目为 1到 6个 ,平均 3 1个 ;其中 2 1个SSR位点 (87 5 % )能够揭示材料间的多态性。根据SSR标记数据计算四川小麦品种间的遗传相似系数 ,其变化范围为 0 5 44到 0 892 ,平均值为 0 6 99。从群体间的遗传相似系数来看 ,四川小麦地方品种群体内的遗传多样性较低 ,而主栽小麦品种群体内的遗传多样性相对较高。从UPGMA聚类关系来看 ,四川小麦地方品种间的亲缘关系较近 ,首先聚在一起 ;其中“中国春”与“成都光头”间的亲缘关系最近 ,进一步证实“中国春”是“成都光头”的一个选系
The genetic diversity of 8 Sichuan wheat landraces and 8 main cultivars was compared using 24 SSR markers. The results showed that a total of 75 alleles were detected at 24 SSR loci. The number of alleles detected at each locus ranged from 1 to 6 with an average of 31. Among them, 21 SSR loci (87.5%) revealed polymorphisms among materials. The genetic similarity coefficients of Sichuan wheat cultivars were calculated based on SSR marker data, ranging from 0 544 to 0 892 with an average of 0 699. The genetic similarity coefficient between populations showed that the genetic diversity of Sichuan wheat landraces was low, while the genetic diversity of the main wheat cultivars was relatively high. From UPGMA clustering relationship, the genetic relationship between Sichuan wheat landraces is relatively close, first of all together; among them, “China Spring” and “Chengdu Bald” have the closest genetic relationship, further confirming that “Chinese Spring” is “Chengdu Bald ”A selection system