【摘要】 <正> 本文报道了从1962年以来利用Co⁶⁰-γ射线处理小麦风干种子,诱发突变并从中选育新品种的研究结果。通过实验,确定了Co⁶⁰-γ射线对小麦进行诱发突变的适宜剂量范围;肯定了Co⁶⁰-γ射线对小麦的诱变作用,并从诱发突变体中选育出春小麦“新曙光一号”和“新曙光二号”等新品种。这些新品种现正在生产上发挥着作用,其中“新曙光一号”的推广面积已达几十万亩。此外还得到许多优良突变品系和类型,正在选择鉴定和生产试验。更多还原

【Abstract】 Results of dry seeds of wheat treated with / rays of Co60,induced wheat mutants and new varieties selected from the mutants since 1962 were reported.The optimum dose of 4 rays of Co60 for the induced mutation of wheat and the role of 4 rays of Cco60 as a mutagen have been identified.New spring wheat varieties "Hsin Shu Kuang 1" and "Hsin Shu Kuang 2" were selected from the induced mutants.They played an important role in production,for example,"Hsin Shu Kuang 1" has been grown over hundreds thousands mu (1/15 hectare).A number of other better lines and types were being under tested.For the induced mutants treated with the 4 rays of Co60,the selection of materials,treatment of progenies,dose of induction,induction effects and the combination of induced mutants with hybrid breeding were discussed.Induced breeding is not only an effective approach of breeding new wheat varieties,but also an important approach to extend gene pools of wheat.更多还原