摘要
将制种田中喷施“九二０”后的母本穗层划分为高层穗、表层穗、平颈穗、包颈穗４个层次。对各种类型穗层的受粉原理、自然受粉状态，与结实率的关系进行了研究分析，提出了母本最佳穗层结构模式，以及在实践中可以采取稀播壮秧、密植等６项农艺措施和配套措施。
The panicles of the maternal parents were grouped into four layers, i.e., high panicle layer (neck length>5 cm), surface panicle layer (neck length<5 cm), panicle neck layer (neck length=0) and enclosed panicle layer (neck length<0), after GA 3 was sprayed in hybrid rice seed production. The pollen receiving principle and natural pose for receiving pollens of the four panicle layers, and their relation to outcrossing rate were described and analyzed. It was found that the panicle neck layer showed the highest seed set, followed by the enclosed panicle layer, then the surface panicle layer, and the high panicle layer the lowest. To establish the optimal structure for panicle layers, six agronomic practices were put forward, i.e., sparse seeding to raise vigorous seedlings, increasing transplanting density, widening row ratio, applying all fertilizers before transplanting, well spraying GA 3 and conducting supplementary pollination by short bamboo rod.
出处
《杂交水稻》
CSCD
北大核心
1997年第2期7-9,共3页
Hybrid Rice
关键词
杂交水稻
制种
立面受粉距离
穗层结构
模式
hybrid rice seed production
maternal line
panicle layer
outcrossing rate
optimal structure
