中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

相同父本的不同两系杂交组合物质生产和运输及产量形成特性

屠乃美; 周文新; 郑 华; 刘爱玉   

  1. 湖南农业大学 农学院， 湖南 长沙 410128
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-05-10 发布日期:2004-05-10

Dry Matter Production and Translocation and Yield Formation Characters of Different Two-Line Hybrid Rice Combinations with the Same Restorer Line

TU Nai-mei; ZHOU Wen-xin; ZHENG Hua; LIU Ai-yu   

  1. （Agricultural College; Hunan Agricultural University; Changsha 410128; China）
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-05-10 Published:2004-05-10

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被引次数

5

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/1125明显高于父本，其余差异不大。

关键词: 杂交水稻, 干物质生产, 干物质运输, 灌浆, 产量

Abstract: 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.

Key words: hybrid rice, dry matter production, dry matter translocation, grain filling, yield