杂交水稻新品种II优718产量结构分析与增产途径

Yield component analysis of hybrid rice II You 718 and its yield increase approach

本文通过II优718品种两年国家区试资料,分析了6个性状与产量的相关、回归与通径关系,建立了回归方程:Y=-7.6423+0.0181X1+0.0085X2+0.0144X3-0.0375X4+0.0713X5+0.1954X6;明确了各性状对产量的贡献大小顺序:每穗实粒数>每亩有效穗数>千粒重>生育期>株高>每穗总粒数。

This paper analyzed the correlation,regression and path relationship of 6 traits with the yield trait in Ⅱ You 718 using materials of two years＇ national regional variety trials. One regression equation was established as Y = -7. 6423 ＋ 0.0181X1 ＋ 0. 0085X2 ＋ 0. 0144X3 - 0.0375X4 ＋0.0713X5 ＋0. 1954X6. The contributory degree of each trait to the yield in descending order is as follows： the fertile spikelets per panicle, effective panicles in unit area, 1000-grain weight,growth period,plant height,total kernels per panicle.