| Rl（t）卷叶基因对杂交稻经济性状的影响 |
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| 引用本文： | 陈宗祥,胡俊,陈刚,潘学彪.Rl（t）卷叶基因对杂交稻经济性状的影响[J].作物学报,2004,30(5):465-469. |
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| 作者姓名： | 陈宗祥 胡俊 陈刚 潘学彪 |
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| 作者单位： | 扬州大学农学院，江苏扬州225009 |
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| 基金项目： | 江苏省农业科技攻关项目 |
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| 摘 要： | 以两对卷叶等基因系杂交组合为研究对象，设置两种施肥水平，研究Rl(t)卷叶基因对杂交稻产量及产量构成因素的影响。结果表明，正常肥力水平下，卷叶组合秧苗期的叶龄、茎蘖数、假茎粗、苗高等指标均低于对应组合，本田前期茎蘖数上升较缓，高峰苗较少，而最终有效穗数显著或极显著多于对应组合，平均穗粒数和千粒重稍低于对
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| 关 键 词： | 杂交稻 卷叶 叶基角 披垂度 产量 超高产育种 |
| 收稿时间： | 2002-12-19 |
| 修稿时间： | 2002年12月19 |
Effects of Rolled Leaf Gene Rl(t) on Economic Traits of Hybrid Rice |
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| CHEN Zong-Xiang,HU Jun,CHEN Gang,PAN Xue-Biao.Effects of Rolled Leaf Gene Rl(t) on Economic Traits of Hybrid Rice[J].Acta Agronomica Sinica,2004,30(5):465-469. |
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| Authors: | CHEN Zong-Xiang HU Jun CHEN Gang PAN Xue-Biao |
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| Institution: | Agricultural College, Yangzhou University, Yangzhou 225009, Jiangsu |
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| Abstract: | Two pairs of crosses of rolled-leaf near-isogenic lines were used to study the effects of rolled-leaf gene Rl_((t)) on yield and its component characteristics of hybrid rice under two levels of fertilizer application. At the treatment of normal fertilizer level, the rolled-leaf crosses appeared to be inferior to corresponding crosses in such characters as seedling leaf age, number of tillers, stem-base width and seedling height in the seedling stage. In the beginning stage after transplanting, the number of tillers of rolled-leaf crosses developed slower, resulting in less tillers in the high peak seedling stage and more effective tillers than the corresponding crosses. The grain number per panicle and 1 000-grain weight of rolled-leaf crosses were significantly lower while the seed-set rate and yield significantly higher than those of the corresponding crosses. In the treatment of more fertilizer applied to the early panicle growth stage, three upper leaves of all crosses grew significantly longer. The leaf drooping angles and basic leaf angles of the non-rolled-leaf crosses enlarged more than those of the corresponding crosses. The number of grains per panicle of all crosses increased significantly and the 1 000-grain weight dropped or significantly dropped. The seed-set rate dropped significantly in the non-rolled-leaf crosses but not in the corresponding crosses. The yield of rolled-leaf crosses increased significantly in the treatment of more fertilizer application but in the corresponding crosses not, which suggested that Rl_((t)) gene could more easily lead to higher yield under the level of higher fertilizer application. Problems concerned and the possible utilization of the rolled-leaf traits were discussed. |
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| Keywords: | Hybrid rice Rolled-leaf Basic leaf angle Leaf drooping angle Yield Breeding for super high yield |
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