| 四川中籼中熟杂交水稻产量与主要经济性状的分析 |
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| 作者姓名： | 吕建群 曾宪平 |
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| 作者单位： | 四川省农科院作物所 成都610066 |
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| 基金项目： | 谢辞：衷心感谢所有参加和承担四川省水稻区试的工作人员. |
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| 摘 要： | 通过对1996—2005年四川省中籼中熟杂交水稻区试试验86个组合的116组数据进行相关和通径分析,结果表明,每穗总粒数与每穗实粒数,结实率与产量均成极显著正相关,有效穗对产量的贡献最大,但由于有效穗数通过穗粒数的间接副作用较大,所以有效穗数太大对提高产量反而不利。笔者认为,四川中籼中熟杂交水稻高产应在保证一定穗数的基础上,主攻每穗实粒数,同时兼顾提高千粒重,协调好性状之间的关系。其单产9.0t/hm2的产量构成因素是:有效穗数265～270万/hm2,每穗总粒数180～200粒,结实率大于84%,千粒重27～29g。
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| 关 键 词： | 杂交水稻 中籼中熟 产量 通径分析 |
Review on Grain Yield and Major Agronomic Characters of Single Season Middle Maturity Hybrid Rice in Sichuan |
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| Authors: | Lv Jianqun Zeng Xianping |
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| Institution: | Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066 |
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| Abstract: | By analyzing 116 group data collected from 86 new single season middle maturity hybrid rices developed in Sichuan for Provincial Yield Trials during 1996 to 2005 with the Coefficient of the correction and path analysis, the result indicated that there exist significant positive correlation between spikelets number of per panicle (SNPP) and filled grain number of per panicle, the ratio of seed setting (SSR) and grain yield, respectively. And the contribution of effective panicle number (EPN) to grain yield is most, but the indirect action of EPN by spikelets number of per panicle is also more, so only increased EPN is not entire to improve grain yield. The authors suggest that breeding for hybrid rice with high yield in Sichuan should follow the way of increasing filled grains per panicle and 1000~ grain weight, as well as balancing the relationship of those characters through establishing hybrid rice population projected. The yield component traits at 9.0t/hm2 should be: effective panicles number (EPN) 2.65~2.70million/hm2, SNPP180~200, SSR>84%, and 1000 grains weight 27~29g. |
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| Keywords: | Hybrid rice Single season Grain yield Path analysis |
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