摘要
研究表明，亚种间杂交稻与汕优６３比较，不仅秕粒率高，而且空粒率也高；不同部位籽粒的空、秕粒率均是二次枝梗大于一次梗，下部大于上部，但这种部位间的差异，空粒率一般很小，而秕粒率则很大；亚种间杂交稻的二次枝梗秕粒率高于汕优６３，而一次枝梗秕粒甚至较汕优６３低（除协优４１３外）。剪叶和疏花对空粒率的影响很小，对秕粒率的影响很大。此外，本文还探讨了提高亚种间杂交稻结实率的途径。
Researeh Showed that the inter-suspecific hybrid rice, compared with Shany-ou 63,had nut only a higher percentage of imperfect grains but also a higher percentage of emptygrains,The percentages of empty and imperfect grains on different postions were in the fullowingurder:secondary branch(SB)>primary branch(PB),lower>upper.This pusitiunal differ-ence,however,was slight for the percentage of empty grains, but remarkable for the percentageof imperfect grains,The percentage of imperfect perfect grains of SB in interspecific hybrid rice washigher than that in Shanyou 63,but that of PB was lower than that in Shanyou 63(except forXieyou 413).Leave and spikelet excision had little effect on the percentage of empty grains,butgreat on the percentage of imperfect grains. In addition, some approaches to increase setting per-centage in inter-subspecific hybrid rice were discussed in this paper.
出处
《江西农业学报》
1995年第1期7-10,共4页
Acta Agriculturae Jiangxi
基金
江西省自然科学基金
关键词
亚种间杂交稻
空粒
秕粒
杂交水稻
水稻
Inter-subspecific hybrid rice
Empty grains
Imperfect grains
