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杂交粳稻株型性状及产量的优势普遍存在 ,不同性状间优势程度有显著差异 ,且株型性状如分蘖势、分蘖角度、单茎茎鞘重、比叶重及叶层空间区域分布、成熟期绿叶面积等对穗粒结构性状有显著影响。在所考察的杂种 F1 2 9个性状中有 2 2个性状与恢复系对应性状呈显著相关。株型改良后的恢复系产量大幅度提高 ,所配制的杂种 F1 株型明显优化 ,竞争优势显著增强。因此 ,改良恢复系株型 ,提高其综合性状 ,是实现杂交粳稻新突破的有效途径之一。
The superiority of plant type traits and yield of japonica hybrid rice existed ubiquitously, and there were significant differences in the superiority between different traits. The plant type traits such as tillering tiller angle, single stem stem and sheath weight, specific leaf weight and leaf space distribution, Green leaf area and other grains have a significant impact on the structural traits. Two of the 29 traits F1 hybrids had significant correlation with the corresponding traits of restorer lines. The plant yield of the improved restorer increased significantly. The hybrid F1 strain was significantly optimized and the competitive advantage was significantly enhanced. Therefore, improving the plant type of restorer line and improving its comprehensive trait is one of the effective ways to achieve new breakthrough in japonica hybrid rice.