新株型水稻物质生产与产量形成的生理生态研究Ⅲ.单株产量与穗部性状的相关和通径分析

Physioecological studies on dry matter production and yield formation in New Plant Type Rice Ⅲ. Yield path analysis and correlation with panicle traits

对 11个新株型稻 (NPT)穗部性状进行了相关与通径分析 ,结果表明 ,有效穗数和穗实粒数偏少是限制单株产量的主要因素。在改良新株型稻的育种中 ,宜采用提高单株有效穗数和增长一次枝梗总长、增加穗实粒数和减少着粒密度、千粒重的技术路线。

The result of genetic correlation and path analysis suggested that the low-nodtillers could be improved to increase productive panicle ,furthermore, seed-setting rates could be also improved by reduce of the number of secondary branches and increase of grain weight, in rice breeding. A further discussion about increase of seed-setting rates and yield of flow-limited varieties by the improvement of rice cultivation were also made in this paper.