摘要
通过回顾总结湖南杂交水稻制种技术改革所取得的成就以及在发展到现阶段，如何进一步提高制种产量，挖掘潜力，从苗数、穗数、结实率和选择柱头外露率高的亲本等途径进行了探讨，并提出了相应的措施。
While summarizing the great achievments obtained from technical reforms and progress in hybrid rice seed production in Hunan Province, the artical deals with the ways to further increase the yields of seed production such as increase of seedling number, panicle number and seed setting rate as well as selection of parents with highly exserted stigmas. It is pointed out that when the number of filled spiklets per panicle is increased by one, the yield per ha may be inceased by 84 kg; if the number of effective panicles per ha is increased by 15×104,the yield per mu will be increased by 126 kg. However, the increase of panicles or spiklets is limited within a certain range, and the seed setting rate possesses greater potentialities. If the seed setting rate is increased from the present 35% to 40%, the yield per ha will be increased by 750-900kg. In order to enhance the seed set, the main measure is to develop such MS lines with highly exserted stigmas as You I A and Jin 23A.
出处
《杂交水稻》
CSCD
北大核心
1993年第4期11-13,共3页
Hybrid Rice
关键词
杂交稻
制种
产量
hybrid rice seed production
potentialities
seed set
stigma exsertion rate
