【摘要】 以350Gyγ射线辐照粳型恢复系K1722干种子,经加代筛选后,获得了粒色分别为红黑色和红褐色的2份有色突变体RK1722-1、RK1722-2。与原亲本相比,2份突变体的生长势有减弱趋势,但未达显著水平;突变体与不育系宁67A配组所得杂种F1的主要农艺性状与对照组合相仿,且所结籽粒均为有色米;简单遗传分析表明,2份粒色突变体均为单基因突变。本文还就利用诱变技术创造粒色突变体和开展有色杂交稻利用等问题进行了探讨。更多还原

【Abstract】 Two mutants of colored brown rice,RK1722-1 and RK1722-2,were developed from K1722,a japonica restorer line of three line hybrid rice,by screening after 350Gy（）⁶⁰Co γ-ray irradiation.As compared with the parental line K1722,the mutants displayed insignificant decreases on growth vigor and productivity.F₁ hybrids of CMS line Ning 67A with the two mutants and the parental line performed similarly,except that the F₁ from the mutants showed colored brown rice.Genetic analysis indicated that the two colored rice mutants were controlled by a single dominant gene.The feasibility of color rice breeding using mutant technology was also discussed.更多还原