【摘要】 对黔农和特矮两个双矮地方种质株高性状的遗传分析结果表明 ,黔农和特矮的矮生性均由 2对隐性矮生基因控制 ,其中各有 1对矮生基因与sd 1等位 ,另 1对与sd 1不等位。黔农中两对矮生基因降低株高的效应不同 ,与sd 1不等位的矮生基因控制的株高比sd 1略矮 ;而特矮的两对矮生基因具有相同的降低株高效应。将分别来自黔农和特矮的携带新半矮生基因的材料命名为“新黔矮”和“新特矮” ,各携带新的半矮生基因sd q(t) 和sd e(t) ;其中新黔矮携带sd q(t)与sd g等 6个矮秆半矮秆基因均不等位。新黔矮在每穗粒数、结实率和千粒重等农艺性状上表现较好 ,有希望应用在育种和生产上替代sd 1。更多还原

【Abstract】 Genetical analysis of dwarfism in two double-dwar f germplasms indicated that the dwarfism in Qiannong and Te’ai were controll ed by two recessive dwarf genes, respectively, of which a common one was allelel ic to sd-1 and the others were non-allelic t o sd-1. Xinqian’ai and Xinte’ai possessin g new semi-dwarf genes sd-q(t) and sd-e(t)from Qiannong and Te’ai, respectively, were selected.Allelism test between sd-q(t)and other genes conferring dwarfism or semi-dwarfism in rice indicated that sd-q(t) was no n-allelic to d-29, d-32, d-59, sd-g, sd-6 and d-1 X . Xinqian’ai carrying the new s emi-dwarf gene sd-q(t) showed to have promising characteristics on agro nomic traits such as grain number per panicle, 1000-grain weight and seed setti ng rate, suggesting that sd-q(t) might be utilized in rice breeding in rep lacement of sd-1 gene.更多还原