摘要
以父本相同的 3个两系杂交组合及其父本为供试材料 ,研究其物质生产和分配及产量形成特点。结果表明 :(1)各组合齐穗期叶面积指数和叶片蔗糖磷酸合成酶活性高于父本 ,后期差异不大 ;(2 )孕穗期至齐穗期各组合群体净同化率、作物生长率高于或接近于父本 ,但齐穗后则有高有低 ;(3)各组合齐穗期糖花比与茎鞘物质输出率的乘积低于其父本 ;(4)父本的穗颈节间输导组织性状优于杂交组合 ,但各组合穗颈节间过氧化氢酶活性高于父本 ;(5 )各组合结实率均低于父本 ,产量仅有陆 18S/ 112 5明显高于父本 ,其余差异不大。
Three two-line hybrid rice combinations and their same restorer line were used to study their dry matter production and translocation characters. The leaf area index and sucrose-phosphate synthase activity of hybrid rice combinations were higher than those of their restorer line at heading stage, but no difference existed after then. The net assimulate rate and crop growth rate of hybrid rice combinations were higher than or similar to those of restorer line from booting to heading. The products of the ratio of saccharide in stem and sheath at heading stage and spikelet weight, and translocation rate of saccharide in stem and sheath were lower in three hybrid rice combinations than those in restorer line. Transport characters of restorer line were supperior to those of hybrid combinations; but the catalase activity in upmost internode of restorer line was higher than that of hybrid combinations. The seed setting rate of hybrid combinations was lower than that of restorer line. The yield of Lu 18S/1125 was significantly higher than that of restorer line, and no significant differences between other two combinations and restorer line were observed.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2004年第3期223-228,共6页
Chinese Journal of Rice Science
基金
湖南省中青年基金资助项目 (0 0TZYZ0 68)
湖南省自然科学基金资助项目 (98JJY2 0 0 9)
湖南省教育厅青年基金资助项目 (0 2B0 11)
关键词
父本
两系杂交组合
水稻
干物质
生产
运输
灌浆
产量
hybrid rice
dry matter production
dry matter translocation
grain filling
yield
