小麦温光敏核不育系柱头外露的遗传研究初报  

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

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：《西南农业学报》2014年第6期2726-2728,共3页Southwest China Journal of Agricultural Sciences

基　　金：云南省应用基础研究面上项目(2010CD096);国家"863"计划课题(2011AA10A106);云南省科技厅重点新产品开发计划项目(2012BB015)

摘　　要：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。本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。Stigma exertion is one of the key factors for improving the out-crossing ability of wheat thermo-photo sensitive genic male sterile（ TPSGMS） line. A DH population derived from K239 S /K92 S was constructed to investigate the inheritance of stigma exertion,K239 S and K92 S were TPSGMS lines with higher and lower stigma exertion rate（ SER）,respectively. SERs of parents,reciprocal crosses and the DH population were evaluated for two years. No significant difference was observed between the SER of reciprocal F1 s of K239 S / K92 S and K92 S / K239 S,implying the trait was controlled by gene（ s） of nucleus. In DH population,the segregation of low and high SERs fitted to a ratio of 3∶ 1 according to Chi-square test,suggesting the stigma exertion of K239 S was controlled by one recessive gene. Effects of temperature and humidity on the expression of stigma exertion were also discussed.

关 键 词：小麦 温光敏核不育系 柱头外露 遗传 

分 类 号：S512[农业科学—作物学]