水稻“秀水27”的突变品系性状研究

矮秆、丰产、迟熟的晚粳稻品种“秀水27”经辐射诱变处理后,获得了比“秀水27”早熟6—11天的早熟突变新品系9份,株高显著降低的特矮秆突变品系5份,蛋白质含量比亲本高6％以上的突变品系8份。还选到千粒重增加,每穗粒数增多的突变新品系。经抗性接种鉴定,多数突变品系保持了原品种的抗性,还有少数突变品系的抗性比原品种提高,有的品系不仅保持了原品种的矮秆抗倒,较抗稻瘟病,米质较优的特征和特性,而且生育期缩短,每穗粒数增多,提高了丰产水平,很有可能成为直接应用于生产的突变新品种。此外,还产生了一大批具有某些优良性状的育种材料可用作种质资源。

STUDY ON CHARACTERS OF MUTANTS INDUCED FROM RICE VARIETY XIU SHUI27

The keng rice variety for later season, "Xiu Shui 27" , with semi-dwarf,long growing period and good yield, was irradiated by 60Co-gamma rays, and some different mutant strains were selected in the following generations. The 9 earlier mutants which were 6-11 days earlier than "Siu Shui 27" , 5 dwarf mutants which were shorter than original variety, 8 mutants which the protein content were toped 6 percent than parent were selected.The thousand grain were heavier and more grains in per panicle were also selected in following generations. After test of resistance, we know that the resistance of most mutant strains were kept as same as original variety,but the resistance of a few mutants were raised.Some mutants not only have kept the better characters which were semidwarf, lodging resistance, blast resistance from original variety, but also have got earliness and large panicle character. So,it has good yield level and maybe become a fine mutant variety. In the other hand, more mutants which have good characters can be used for in rice breeding.