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.
出处
《西南农业学报》
CSCD
北大核心
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)
关键词
小麦
温光敏核不育系
柱头外露
遗传
Wheat
Thermo-photo sensitive genic male sterile line
Stigma exertion rate
Genetic analysis
