小麦辐射二代性状的数量遗传分析  

QUANTITATIVE GENETIC ANALYSES ON CHARACTERS OF M_2 GENERATION IN WHEAT (Triticum aestivun L.)

作　　者：王贵学[1] 朱孝达[1] 向奇汉 

机构地区：[1]西南农业大学农学系,重庆630716 [2]重庆大学系统工程及应用数学系

出　　处：《生物数学学报》1994年第4期135-142,共8页Journal of Biomathematics

基　　金：四川省科委资助

摘　　要：本文采用生物统计和数量遗传学方法、分析了辐照剂量为0（对照）、15、25、35KR的铯─137γ射线对二个小麦品种的诱变效应及其选择效果；估算了七个数量性状的分布特征数和遗传方差、遗传变异系数、遗传力、遗传进度、相对遗传进度等遗传参数。辐射二代的变异较大，有大粒、大穗、早熟突变体出现；株粒重、穗粒重、穗长、穗粒数、抽穗期的遗传变异系数和相对遗传进度都较大，选择效果较好；铯-137γ射线能有效地应用于小麦辐射育种，且适宜辐照剂量为35KR。Methods of biostatistics and quantitative genetics were adopted to analyse irradiation effectiveness and selection potential of wheat varieties irradiated by^(137)Cs gamma rays with 0,15,25,35 krad.statistic e.g.x and cv and genetic parameters e.g.σ_g^2,GCV,h_B^2,GS,RGS were estimated.Considerable variation of characters showed in M_2 generation,heavy-grain,big-spike and early-maturing mutants occurred in M_2.Because of higher GCV and RGS of grain wt.per plant,grain wt of main spike,spike length,grain no.of main spike and heading time than other characters,selection effect would be better.(137)~Cs gamma rays could effectively been made use of in irradiation breeding of wheat,suitable irradiation dosage of them was 35KR.

关 键 词：小麦 辐射育种 数量遗传分析 铯—137γ射线. 

分 类 号：Q348[生物学—遗传学]