| 杂交水稻春秋双季制种高产性状量化指标初探 |
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| 引用本文： | 陈晓溪.杂交水稻春秋双季制种高产性状量化指标初探[J].杂交水稻,1993(5). |
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| 作者姓名： | 陈晓溪 |
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| 作者单位： | 福建省泉州市农业局 362000 |
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| 摘 要： | 通径分析表明，对于杂交水稻春秋双季制种产量的相对重要住的性状依次为结实率＞每亩穗数＞每穗总粒数＞千粒重＞剑叶长＞株高．通过建立产量与其构成因素穗数、结实率、总粒数和千粒重的多元回归方程式，因地制宜设计出了有关杂交组合，规范双季制种的穗粒结构量化指标．讨论了实现有关量化指标的技术措施。
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| 关 键 词： | 杂交水稻制种 产量 通径分析 量化指标 |
Quantitative Criteria of High Yielding Characters of Hybrid Rice Seed Production in Spring and Autumn |
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| Chen Xiaoxi.Quantitative Criteria of High Yielding Characters of Hybrid Rice Seed Production in Spring and Autumn[J].Hybrid Rice,1993(5). |
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| Authors: | Chen Xiaoxi |
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| Abstract: | The yield of hybrid rice seed production in spring and auturmn has stagnated for a long time. The path analysis has showed that the relative importance in yield components in seed production is seed set rate>panicks per mu>grains per panicle>1000-grain-weight>flag leaf lenght>plant height, so emphasis should ie placed on increase of panicles per mu and grains per panicle as well as enhancement of seed set rate. But the climate during ho production in spring or autumn has its specific characteristics. The humidity at the flowering time of seed production in spring is rather high, and that in autumn is quite the contrary. In or- der to enhance the outcrossing rate, the following techniques may be adopted: when 15% of panicles emerges in seed production in spring, patting the bracts to remove dew drops can result in decrease of humidity and raise of lemperature, sthus making the flowering time to be earlier, when seed production in autumn is con- ducted,use of a high-pressure sprayer to spray cole water can result in increase of humidity,thus prolonging the vitality of pollens and stigmas. |
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| Keywords: | hybrid rice seed production yields path analysis quantitative criteria |
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