小麦抽穗期和株高的辐射遗传效应  

GENETIC STUDY ON HEADING TIME AND PLANT HEIGHT OF WHEAT IRRADIATED BY ￣(137)Cs AND ￣(60)Coγ-RAYS

作　　者：王贵学[1] 朱孝达[1] 

机构地区：[1]西南农业大学农学系

出　　处：《核农学报》1995年第1期20-24,共5页Journal of Nuclear Agricultural Sciences

摘　　要：以两个小麦品种为材料，用０、２０、３０、４０ｋｒａｄ的１３７Ｃｓ和６０Ｃｏγ射线辐照，探讨其抽穗期和株高的辐射遗传效应，比较两种辐射源的差异。结果表明：１３７Ｃｓ和６０Ｃｏγ射线均能诱发早熟和矮秆突变，辐射遗传效应显著并相似。说明两种辐射源均可采用，但性状的平均表现与遗传方差、遗传变异系数、遗传力、遗传进度、相对遗传进度等遗传参数值随品种、辐照剂量和辐射世代的不同而异。诱变效果较好的品种是７７中－２８８２，剂量为３０ｋｒａｄ；在Ｍ２、Ｍ３代的辐射遗传效应明显。The 137Cs and 60COγ-rays with 0,20,30 and 40 krad were used to irradiate two wheat va-rieties to study the genetic effects of both irradiation sources on heading time and plantheight.It revealed that both irradiation sources had similar impact on heading time and plantheight and the effects,vere significant.It was clear that both irradiation sources were able toinduce the generation of early ripening and short-stalked mutants.With regard to the heading time and plant height,the means and genetic parameters,e.g, genetic variance,geneticcoefficient of variation,heritability,genetic advance and relative genetic advance,variedwith varieties, irradiation dosages and generations;Mutants with good characters were ob-tained by using variety 77-zhong-2882 and an irradiation dose of 30 krad.The genetic effectsof irradiation were remarkable in their M2 and M3 generations.

关 键 词：小麦 钴60 Γ射线 遗传效应 抽穗期 株高 

分 类 号：S512.103.5[农业科学—作物学]