| 籼粳亚种间杂交稻甬优6号超高产株形特征与竞争优势分析 |
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| 引用本文： | 马荣荣,许德海,王晓燕,禹盛苗,金千瑜,欧阳由男,朱练峰.籼粳亚种间杂交稻甬优6号超高产株形特征与竞争优势分析[J].中国水稻科学,2007,21(3):281-286. |
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| 作者姓名： | 马荣荣 许德海 王晓燕 禹盛苗 金千瑜 欧阳由男 朱练峰 |
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| 作者单位： | 1.宁波市农业科学研究院， 浙江 宁波 315040； 2中国水稻研究所 水稻生物学国家重点实验室， 浙江 杭州 310006； 3宁波市种子公司， 浙江 宁波 315012; *通讯联系人， E-mail： xucrri@mail.hz.zj.cn; yusm@mail.hz.zj.cn |
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| 基金项目： | 国家科技部中试示范资助项目;浙江省科技攻关项目 |
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| 摘 要： | 2003-2005年的试验结果表明，与常规晚粳稻秀水63和籼型杂交晚稻汕优63相比，三系籼粳亚种间杂交晚粳稻甬优6号的超高产与其生育期间株形特征及竞争优势密切相关。生育前期，甬优6号的分蘖数介于籼、粳稻之间，消长平稳，分蘖力中等，无效分蘖少；生育中期，植株的茎、鞘、叶生长快，生物量大，上3叶长而内卷挺立，群体上下受光态势好；生育后期，植株高大，茎秆粗壮，鞘叶长而抱秆紧密，茎基部节间短而厚重；成熟期，穗呈弧形，一、二次枝梗数特别多，粒多穗重，着粒密度适中，粒形偏团；各生育阶段的根冠比高。另外，对籼粳亚种间超级杂交稻的理想株形进行了讨论。
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| 关 键 词： | 亚种间杂交稻 超高产 株形 竞争优势 |
| 文章编号： | 1001-7216（2007）03-0281-06 |
| 收稿时间： | 2006-09-28 |
| 修稿时间： | 2006-09-282007-01-15 |
Heterosis on Plant Morphology of Yongyou 6,an indica-japonica Inter-subspecific Super High-Yielding Hybrid Rice |
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| MA Rong-rong,XU De-hai,WANG Xiao-yan,YU Sheng-miao,JIN Qian-yu,OUYANG You-nan,ZHU Lian-feng.Heterosis on Plant Morphology of Yongyou 6,an indica-japonica Inter-subspecific Super High-Yielding Hybrid Rice[J].Chinese Journal of Rice Science,2007,21(3):281-286. |
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| Authors: | MA Rong-rong XU De-hai WANG Xiao-yan YU Sheng-miao JIN Qian-yu OUYANG You-nan ZHU Lian-feng |
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| Institution: | 1 Ningbo Academy of Agricultural Sciences. Ningbo 315040. China; 2 State Key Laboratory of Rice Biology, China National RiceResearch Institute, Hangzhou 310006, China;3 Seed Company of Ningbo, Ningbo 315012, China |
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| Abstract: | According to the results of the experiments conducted in 2003 - 2005, Yongyou 6, a late season inter subspecific hybrid rice combiaation derived from a japonica cytoplasmic male sterile line Yongjing 2A and an indiea restorer line K264806, performed high yielding potential, which was closely related to its outstanding heterosis in plant morphology over the japonica inbred rice Xiushui 63 and indica hybrid rice Shanyou 63. At the early growth stage, the tiller number of Yongyou 6 was between that of Shanyou 63 and that of Xiushui 63, and it showed a moderate tillering ability and less non-effective tillers. At the middle growth stage, the culms, sheaths and leaves of Yongyou 6 grew faster with higher biomass. The population of Yongyou 6 had better light distribution in its canopy because of its three top upright, longer and cured leaves. At the late growth stage, although Yongyou 6 was of high plant, but it perfected very strong tolerance to lodging due to its long and closed sheathes and short and thick basal internodes. At the maturity stage, Yongyou 6 showed arc-shaped panicles with more primary and secondary branches. The grain density of panicle was moderate with more oblate grains. The root-shoot ratio of Yongyou 6 was very higher aT the whole growth stage. Moreover, the ideo-plant morphology of indica-japoniea intersubspecific super high-yielding hybrid was also discussed. |
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| Keywords: | inter-subspecific hybrid rice super high-yielding plant morphology heterosis |
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