中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

水稻半矮秆基因sd1对农艺性状的影响

石春海; 申宗坦   

  1. 浙江农业大学农学系，杭州310029
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1996-01-10 发布日期:1996-01-10

Effects of Semidwarf Gene sd1 on Agronomic Traits in Rice (Oryza sativa subsp. indica)

Shi Chunhai; Shen Zongtan   

  • Received:1900-01-01 Revised:1900-01-01 Online:1996-01-10 Published:1996-01-10

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摘要： 比较了从7份半矮秆品种／高秆品种的B7F2中分离的高矮秆近等基因系，sd1基因抑制了节间伸长，从基部到倒第1节及穗长分别为高秆的38. 2%, 26. 0%, 48. 0%, 71. 1%和 92. 6%，缩短程度逐步减轻。sd1基因还可促进有效穗数、结实率和收获指数的提高而使矮秆类型的产量潜力高于高秆类型，但sd1基因并不影响抽穗天数、每穗粒数和千粒重。对sd1基因的多效性以及秆高和穗数的关系进行了讨论。

关键词: 半矮秆基因, 多效性, 矮秆近等基因系, 高秆近等基因系

Abstract: Seven tall and dwarf near isogenic lines was bred by semidwarf/tall varieties (B7F2) and the effects of semidwarf gene sd1 on agronomic traits in indica rice was studied. The results indicated that the length of internodes were inhibited by the sd1 gene, and the length of internodes from the basal internode to the uppermost internode and panicle of dwarf near isogenic lines were 38. 2%, 26. 0%, 48. 0%, 71. 1% and 92. 6 % of tall ones, respectively. The effective panicles per plant, spikelet fertility and harvest index were increased by sd1 gene, and the yield of dwarf near isogenic lines was higher than tall ones. But it was no effects of sd1 gene on the traits of days to heading, No. of spikelets per panicle and 1000 grains weight. The pleiotropism of sd1 gene and the relationship of plant height and effective panicles were discussed.

Key words: dwarf near isogenic line, pleiotropism, semidwarf gene, tall near isogenic line