中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

稻穗颖花开花日序对籽粒胚乳细胞数和米质的影响

刘立军1; 谢光辉2   

  1. 1扬州大学 农学院 农学系，江苏 扬州 225009； 2 中国农业大学 农学系，北京 100094
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-04-10 发布日期:2001-04-10

Effect of Flowering Sequence of Spikelets on Endosperm Cells and Grain Quality of Rice

LIU Li-jun 1; XIE Guang-hui 2   

  1. (1 Department of Agronomy; Agricultural College; Yangzhou University; Yangzhou 225009; China; 2Department of Agronomy; China Agricultural University; Beijing 100094; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-04-10 Published:2001-04-10

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摘要： 以不同类型水稻品种为材料，分析了稻穗颖花开花日序对籽粒胚乳细胞数和米质形成的影响。研究发现，同一穗上随着开花日序的推迟，籽粒胚乳细胞数逐渐减少，垩白率、垩白度逐渐上升，糊化温度和直链淀粉含量逐渐降低。上述主要米质性状与胚乳细胞数密切相关，而与单个胚乳细胞重相关不显著。孕穗期去1/2株或始穗期喷施6-BA［6-(苄基)腺嘌呤］，籽粒的胚乳细胞数明显上升，垩白率、垩白度明显下降，糊化温度上升；孕穗期去1/2叶，结果相反；表明由于胚乳细胞数的不同，造成了穗上籽粒间米质的差异。还就改善米质的措施进行了讨论。

关键词: 水稻, 开花日序, 胚乳细胞数, 米质

Abstract: Using different rice cultivars as materials, effect of flowering sequence on endosperm cells (ECs) and grain quality was analyzed. The results showed that with the delaying of anthesis of spikelets in a panicle, ECs decreased, chalky percentage (CP) and chalkiness (CN) increased while gelatinization temperature (GT) and amylose content (AC) decreased. Grain qualities significantly correlated with ECs, but not significantly correlated with single endosperm cell weight. ECs and GT increased significantly while CP and CN decreased when removing 1/2 plants at booting stage or spraying 6-BA [6-(benzyl) adenine] at early heading stage, and the results were reversed when cutting 1/2 leaves at booting stage. These results suggested that the difference of ECs resulted in different rice grain quality.The approaches to improving rice grain quality were discussed.

Key words: rice, flowering sequence, endosperm cells, grain quality