黄淮南片小麦产量构成因素的相关分析

Correlation Analysis on the Yield and Yield Components of Wheat in South Huang-Huai River

为研究黄淮南片小麦产量构成三要素对产量影响的相对重要性,对黄淮南片2011～2012年度冬水组试验的28个小麦品种（系）的产量及产量构成因素进行相关分析和通径分析.结果显示,产量构成因素的变异系数大小顺序为千粒重＞穗粒数＞有效穗,产量构成因素与产量的相关程度为有效穗＞穗粒数＞千粒重；偏相关分析显示产量构成因素与产量呈极显著正相关,相关系数顺序为有效穗＞穗粒数＞千粒重,有效穗与穗粒数、穗粒数与千粒重呈极显著负相关；产量构成因素对产量的直接通径系数都为正值,顺序为穗粒数＞有效穗＞千粒重.结果表明,黄淮南片高产小麦的选育在种质创新程度上偏低,产量水平稳定在6 500 ～9 000kg/hm2.根据黄淮南片小麦生态条件特点,应该选育多穗型品系,提高穗粒数,增加千粒重.

To identify the relative performance of yield compenents of wheat in South Huang-Huai River,28 wheat varieties （lines）collected from winter water group on the South Huang-Huai River from 2011 to 2012 were studied by correlation and path analysis. The results showed that ： the coefficient of variation of yield components ： 1000-grain weight 〉 grains per spike 〉 spikes;correlation between yield components and yield：spikes 〉 grains per spike 〉 1000- grain weight. The results of partial correlation analysis showed ： there were extremely significant positive correlation between yield component and yield,the order was spikes 〉 grains per spike 〉 1000-grain weight;the spike and the grains per spike, the grain per spike and the 1000-grain weight were significant negative correlation. The direct path coefficient of three yield components on yield was positive. According to the results of this study, wheat lines with multiple spike,more grains per spike,and higher 1000-grain weight should be selected for local wheat breeding in the South Huang-Huai River.