Preliminary Study on Inheritance of Stigma Exertion in Wheat Thermo-photo Sensitive Genic Male Sterile Line  

小麦温光敏核不育系柱头外露的遗传研究初报（英文）

作　　者：李宏生[1] 丁明亮[1] 顾坚[1] 田玉仙[1] 赵红[1] 吴绍柱 杨素梅 杨和仙[1] 李绍祥[1] 

机构地区：[1]云南省农业科学院粮食作物研究所,云南昆明650205 [2]腾冲县界头镇农业技术推广站,云南腾冲679106

出　　处：《Agricultural Science & Technology》2015年第9期1930-1932,1938,共4页农业科学与技术（英文版）

基　　金：Supported by Applied Basic Research Program of Yunnan Province(2010CD096);National High-tech Research and Development Program of China(863 Program)(2011AA10A106);Key New Products Development Program of Department of Science and Technology,Yunnan Province(2012BB015)~~

摘　　要：Stigma exertion is one of the key factors for improving the outcrossing ability of wheat thermo-photo sensitive genic male sterile（TPSGMS） line. A DH population derived from K239S/K92 S was constructed to investigate the inheritance of stigma exertion. K239 S and K92 S are TPSGMS lines with higher and lower stigma exertion rates（SER）, respectively. The SERs of parents, reciprocal crosses and the DH population were evaluated for two consecutive years. The results showed that no significant difference was observed in SER between F1 s of K239S/K92 S and K92S/K239 S,implying that stigma exertion was a trait controlled by nuclear gene（s）. In the DH population, the segregation of low and high SERs fitted to a ratio of 3 ∶1 by Chisquare test, suggesting that the stigma exertion of K239 S was controlled by one pair of recessive genes. In addition, the effects of temperature and humidity on the expression of stigma exertion were also discussed.不育系的柱头外露是提高小麦异交结实率的关键因子之一。该研究以高柱头外露率的小麦温光敏核不育系K239S与低柱头外露率的不育系K92S杂交构建DH群体,对亲本、正反交F1和DH群体进行柱头外露率鉴定,结果正反交F1柱头外露率差异不显著,表明柱头外露受细胞核基因控制;DH群体低柱头外露率与高柱头外露率的分离比符合3∶1,推测该小麦温光敏核不育系的柱头外露由1对隐性主基因控制。

关 键 词：WHEAT Thermo-photo sensitive genic male sterile line Stigma exertion rate Genetic analysis 

分 类 号：S512.1[农业科学—作物学]