Genetic diversity of involved varieties and improvement of elite restorer of Indica rice using backcross introgression
2008
Cui Jinteng | Chen Bingxu | Shi Yingyao
chinois. 选取53个SSR标记,分析了55份参试水稻种质的遗传多样性和亲缘关系,以期为选配组合与改良亲本提供参考.本试验共检测到267个等位变异,平均每个位点等位变异数为5.04个,变化范围为4～7个;53个SSR标记的多样性指数(PIC)平均为0.624,变化范围是0.287～0.786.55份不同材料大体上可分为籼稻和粳稻两大类,各品种间遗传距离在0.588～0.996之间.明恢86与53份供体亲本间的相似性系数为0.655～0.850,蜀恢527与53份供体亲本间的相似性系数为0.640～0.873.试验结果表明检测SSR多态性是研究水稻品种之间遗传差异的高效、准确的手段之一,为高代回交导入群体的有利基因发掘和利用提供了有益的参考.
Afficher plus [+] Moins [-]anglais. A total of 53 SSR markers were used to analyze the genetic diversity and relationship among 55 rice germplasms for making reference to cross combinations and improvement of parents. 267 allelic variation were detected, and the average allelic variation of 53 loci is 5.04, ranged from 4 to 7. the average polymorphism index content (PIC) of SSR markers is 0.624, ranged from 0.287 to 0.786. All germplasms could be divided into indica and japonica rices, the genetic distances between them varied from 0.588 to 0.996. The comparability coefficient between Minghui 86 and 53 donors is from 0.655 to 0.850, it is from 0.640 to 0.873 between Shuhui 527 and the donors. The results indicated that detection of SSR polymorphisms was one of the most efficient and accurate measures to study the genetic differences among rice varieties, which was helpful to the discovery of favorable genes and their utilization in advanced-backcross introgression populations.
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