论文部分内容阅读
选取均匀分布在水稻12条染色体上的120对SSR引物,对19份杂交水稻骨干恢复系进行遗传多样性分析。结果表明,在所分析的120个位点中,多态性位点为69个,多态性位点百分率(P)为57.5%,每1个位点平均等位基因数(A)为4.84个,变幅为2～12个,平均多态性信息含量指数(PIC)为0.617。通过聚类,19个杂交水稻骨干恢复系可以划分到两个类群中,Ⅱ类恢复系材料间遗传距离较近,大多为恢复系明恢63的衍生系,初步表明在现有的骨干恢复系中,恢复系遗传基础相对比较狭窄。
120 pairs of SSR primers uniformly distributed on 12 chromosomes of rice were selected to analyze the genetic diversity of 19 restorer lines in hybrid rice. The results showed that of the 120 loci analyzed, there were 69 polymorphic loci, the percentage of polymorphic loci (P) was 57.5% and the average number of alleles per locus (A) was 4.84 A range of 2 to 12, the average polymorphism information content index (PIC) was 0.617. Through clustering, 19 hybrid rice restorer lines could be divided into two groups. The genetic distance between the restorer lines of Type II was relatively close, most of which were the derivative lines of restorer line Minghui63, which indicated that in the existing backbone restorer lines In the restorer line, the genetic basis is relatively narrow.