| 水稻不育系紫A的开花习性及异交结实性 |
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| 引用本文： | 杨胜荣,黄宗洪,向关伦,甘雨,杨占烈,潘建慧.水稻不育系紫A的开花习性及异交结实性[J].贵州农业科学,2009,37(12). |
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| 作者姓名： | 杨胜荣 黄宗洪 向关伦 甘雨 杨占烈 潘建慧 |
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| 作者单位： | 1. 贵州大学,农学院,贵州,贵阳,550025
2. 贵州省水稻研究所,贵州,贵阳,550006 |
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| 基金项目： | 贵州省科技攻关"水稻不育系紫A的配合力测定及新组合筛选"，贵州省省长基金"水稻新型三系不育系紫A的配组组合筛选研究" |
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| 摘 要： | 为了掌握新选水稻三系不育系紫A的异交特性,对其开花习性及异交结实性进行了初步研究.结果表明:花时集中在9:30-16:00,11:30时达到开花高峰期,午前开花率占68.2%;颖花张颖角度变幅为20°～29.4°,开闭颖历时9.5 h;单穗开花高峰期为始花后的3～6 d;柱头较大且在施用"九二〇"情况下外露率高达79.88%,人工辅助授粉的情况下,紫A的异交结实率为73.69%,自然授粉的异交结实率仅为59.65%,变化幅度大且异交结实率受外界环境影响较大.
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| 关 键 词： | 水稻 不育系 开花习性 异交特性 |
Flowering Habit and Out-cross Characteristics of Purple A, a Rice Male Sterile Line |
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| YANG Sheng-rong,HUANG Zong-hong,XIANG Guan-lun,GAN Yu,YANG Zhan-lie,PAN Jian-hui.Flowering Habit and Out-cross Characteristics of Purple A, a Rice Male Sterile Line[J].Guizhou Agricultural Sciences,2009,37(12). |
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| Authors: | YANG Sheng-rong HUANG Zong-hong XIANG Guan-lun GAN Yu YANG Zhan-lie PAN Jian-hui |
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| Abstract: | In order to hold out-crossing characteristics of Purple A, a new rice male sterile line, The results from studying the flowering habit and out-cross characteristics of it, showed that its flowering time was from 9:30 Am to 16:00 Pm, the flowering peak was at 11:30, the forenoon flowering rate was 68.2%, the glume open angle varied from 20° to 29.4°, the glume opening and closing period lasted 9.5 h, the flowering peak period of single spike was 3～6 d after its first flowering, the stigma exsertion rate was up to 79.88% under applying Gibberellin (GA_3), the out-crossing setting rate was 73.69% under artificial supplementary pollination, the out-crossing setting rate was only 59.65% under natural pollination and its change range and out-crossing setting rate were affected by environmental factors. |
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| Keywords: | rice sterile line flowering habit out-cross characteristics |
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