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用核辐射直接诱变杂交稻B系和R系 ,获得长穗颈高秆隐性eui突变体 ,继而育成长穗颈不育系 (eA)和高秆隐性恢复系 (eR) ,并组配出带有eui基因的高秆隐性杂交稻 (e 杂交稻 )。研究结果表明 ,eui基因具有较高的突变率 ,平均为 0 .10 % ,变幅为 0 .0 2 %～ 0 .4 7% ;依不同B系遗传背景和不同剂量而异。eui基因存在遗传多型性 ,发现了eui2 (t)新基因。eA系穗颈节显著伸长、异交潜力明显提高。e 杂交稻株高增高 3～ 10cm ,早熟 2～ 3d ,粒重增大 ,有增产的潜力。就不用 (少用 )赤霉素的种子生产技术体系以及e 杂交稻育种技术体系的建立进行了讨论。
Direct mutagenesis of B and R lines of hybrid rice with nuclear radiation led to the development of a recessive eui mutant of long-necked tall stalk, and then to the growth of male sterile line (eA) and high stalk recessive restorer line (eR) Distribute high stalk recessive hybrid rice (e hybrid rice) with eui gene. The results showed that the eui gene has a high mutation rate, with an average of 0.10%, amplitude 0.2% ~ 0.47%; according to different genetic background and different doses of B series vary. There is a genetic polymorphism in the eui gene and a new eui2 (t) gene was found. eA panicle neck section significantly extended, significantly improved the potential for outcrossing. e hybrid rice plant height increased 3 ~ 10cm, early maturity 2 ~ 3d, grain weight increase, the potential for yield. The technical system for seed production of (less used) gibberellin and the establishment of e hybrid rice breeding technology system are discussed.