水稻拔节期叶片形态特征与产量因子的回归分析

Regressive analysis between leaf characters and yield factors in elongation stage in rice

通过对水稻拔节期不同产量群体叶片性状与产量构成因素关系的研究,分析了叶片长度、角度以及弯曲度与千粒重、结实率及穗粒数的关系。结果表明:汕优63的千粒重与顶部3张叶片的长度及穗粒数与叶片弯曲度均呈多元线性负相关,结实率与叶片角度之间呈多元线性正相关;武运粳8号的千粒重与叶长及结实率与叶角之间均呈多元线性正相关,穗粒数与叶片弯曲度间呈线性负相关。回归模型的模拟值与实测值的吻合度较高。

<Abstrcat> The relationship between leaf characters and yield components was studied using rice population with different yiels. The results indicated that the multiple correlations between 1000-grain-weight and length of upper-3-leaf, and between grain number per panicle and leaf curving degree were negative, with grain seeting percentage and leaf angle was positively correlated in Shanyou 63. The correlations between 1000-grain-weight and length of upper-3-leaf, and between grain setting percentage and leaf angle were positive, but that between grain number per panicle and leaf curving degree was negative in Wuyunjing 8. The simulated value by regression model and observed value was well inosculated in this study.