普通小麦PTS光温敏雄性不育的遗传分析  

Genetic analysis of photo-thermo partially sensitive male sterile lines of PTS wheat

作　　者：宋亚珍[1] 陈天佑[1] 雷国材[1] 耿东梅[2] 王强[1] 路明[1] 

机构地区：[1]西北农林科技大学农学院,陕西杨陵712100 [2]北京农林科学院,北京100089

出　　处：《西北农林科技大学学报（自然科学版）》2003年第3期47-50,共4页Journal of Northwest A&F University(Natural Science Edition)

摘　　要：以 PTS和常规品种 (系 )小偃 6号、西农 872 7、小偃 2 2、陕 2 2 9、陕 785 9、周麦 1 1等互为父母本进行杂交 ,分期播种 F1 和 F2 ,田间考察自交结实率和育性分离情况。结果表明 :F1 正反交组合的结实率不受细胞质影响 ,说明 PTS系的育性遗传为核基因控制。同时 ,F2 代育性变化是一个连续的过程 ,以结实率 70 %为界划分可育与不育及半不育时 ,出现 3∶ 1的分离比 ,因此认为 PTS系的不育表达是一主效隐性基因和多个微效 (修饰 )Photo thermo partially sensitive male sterile wheat line PTS was reciprocally crossed with 13 wheat varities,selfed seed fertility (%) of F 1 hybrids and segregation ratio of the fertile and sterile plants in F2 generation of 5 crossed were observed.The result showed that fertility of F 1 generation is not affected by maternal parents.F 2 generation gave sterile,part-sterile and fertile plants and the fertility change was successive.It seemed that sterility was controlled by nucleus allogenes.If fertility of 70% was taken as the demarcation line between sterile and fertile plants,the ratio of fertile to sterile would be 3∶1.So it could be indicated that the male sterility might be controlled by a numbers of microeffective modification genes,and their founctions was similar to a major gene.

关 键 词：普通小麦 PTS光温敏雄性不育 遗传分析 核基因控制 育性变化 主效隐性基因 微效基因 

分 类 号：S512.1[农业科学—作物学]