用 2 0 0Gy60 Co_γ射线辐照玉米自交系“黄早 4”干种子 ,会引起自交系各性状的较大变异。M1表现出明显的辐射生理损伤效应 ,M2 、M3 的质量性状未发现有明显的变异 ,但生育期、株高、穗位高、穗长等数量性状出现较高的突变频率 ;M3 开始出现黄、白化苗、矮生株等隐性突变和雄性不育株 ,同时在粒色上也产生了有明显变异的个体。再次证明异花授粉作物的辐射诱发突变导致M2 形成杂合的植株 ,而诱发突变大多为隐性的 ,需在M3 纯合后才表现出来 ,M4 代测交种试验结果表明 ,自交系经辐照后 ,有选择出高配合力个体的可能 Inbred lines of “Huangzao 4” were inoculated with 200 Gy60 Co_γ rays, which caused large variations in the traits of inbred lines. M1 showed obvious physiological effects of radiation injury. There was no obvious variation in the quality traits of M2 and M3, but the higher frequencies of mutation appeared in QTLs such as growth period, plant height, ear height and ear length. M3 began to appear yellow , Albino seedlings, dwarf plants and other recessive mutations and male sterile plants, but also produced significant variation in the grain size of individuals. Again proved that cross-pollination of crops radiation-induced mutations lead to M2 heterozygous plants, and induced mutations are mostly recessive, need to be displayed after the M3 homozygosity, M4 generation test results show that inbred lines After irradiation, there is the possibility of selecting individuals with high combining ability