| 孕穗期自然低温对籼型杂交水稻的影响分析 |
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| 引用本文： | 杨仕华,余常水,程本义.孕穗期自然低温对籼型杂交水稻的影响分析[J].杂交水稻,2003,18(6):51-54. |
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| 作者姓名： | 杨仕华 余常水 程本义 |
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| 作者单位： | 1. 中国水稻研究所,浙江,杭州,310006
2. 遵义市农业科学研究所,贵州,遵义,563102 |
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| 基金项目： | 农业部国家农作物品种区域试验项目 (2 0 0 2 ) |
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| 摘 要： | 孕穗期低温主要通过影响籼型杂交水稻结实率导致产量降低，对有效穗，每穗粒数和粒重无明显影响。在自然低温条件下，籼型杂交水稻组合间孕穗期耐冷性表现出明显的强、中、弱差异；进一步对亲本组合的分析发现，籼型杂交水稻孕穗期耐冷性与不育系和恢复系均有关，而与恢复系的关系更为密切：建议以低温影响后的结实率及其与正常结实率的差异程度作为评价水稻品种孕穗期耐冷性的指标。
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| 关 键 词： | 籼型杂交水稻 孕穗期 自然低温 耐冷性 结实率 |
| 文章编号： | 1005-3956(2003)06-0051-04 |
| 修稿时间： | 2003年6月28日 |
The Effect of Natural Low Temperature in Booting Stage on Indica Hybrid Rice |
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| YANG Shi-hua,YU Chang-shui,CHENG Ben-yi.The Effect of Natural Low Temperature in Booting Stage on Indica Hybrid Rice[J].Hybrid Rice,2003,18(6):51-54. |
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| Authors: | YANG Shi-hua YU Chang-shui CHENG Ben-yi |
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| Institution: | YANG Shi-hua~1,YU Chang-shui~2,CHENG Ben-yi~1 |
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| Abstract: | The effect of natural low temperature in booting stage on indica hybrid rice was analyzed. The results indicated that the low temperature in booting stage had a great effect on decreasing the seed-setting rate, resulting in decrease of grain yield, but it had not much influence on the traits of effective panicles, spikelets per panicle and grain weight. Under natural low temperature conditions in booting stage, the tested indica hybrid rice combinations showed a great difference in cold tolerance among them. According to their cold tolerance, the tested F 1 hybrids can be divided into three types, i.e., strong, medium and weak cold tolerance varieties. Through further analysis on the parents of the F 1 hybrids, it was found that the cold tolerance of a hybrid was related to both of its parents, but more closely to the restorer line. Furthermore, it was suggested that the difference between the seed-setting rate under normal conditions and that under low temperature conditions in booting stage be used as the indicator for evaluating the cold tolerance in booting stage of rice varieties. |
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| Keywords: | indica hybrid rice booting stage natural low temperature cold tolerance seed-setting rate |
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