山东省区试小麦产量与产量构成因素的相关和通径分析

Correlation and Path Analysis of Yield Components of Winter Wheat Varieties with High Yield Potential Cultured in Regional Trials of Shandong Province

为了揭示小麦产量构成三因素对产量影响的相对重要性,采用相关和通径分析法,对山东省2008—2009年度小麦高肥组区试165个小麦品种(系)的产量及其构成因素进行统计分析。结果表明:产量构成因素的变异系数大小为:穗数>穗粒数>千粒重;产量构成因素与产量的相关程度为:穗数>穗粒数>千粒重;偏相关分析,穗数和千粒重均与产量呈极显著正相关,穗粒数与产量呈显著正相关,产量构成因素之间的偏相关均呈极显著负相关;3个产量构成因素对产量的直接通径系数都为正值,这与偏相关分析的结果是一致的。根据分析结果和山东省生态条件及目前种植条件特点,小麦高产育种和高产栽培应以选育和选用多穗型大群体品种为主,同时要稳定穗粒数,提高千粒重。

To reveal the yield components of wheat yield of the three factors on the relative importance,using correlation and path analysis,on the Shandong Province from 2008 to 2009 wheat area of high fat group trial of 165 wheat varieties （lines） yield and its components were analyzed.The results showed that： the coefficient of variation of yield components size： spikes grains per spike 1000-grain weight;Yield components and yield related degree： spikes grains per spike 1000-grain weight;Partial correlation analysis,spike and thousand seed weight and yield were highly significant positive correlation,the number and yield of grain was positively related to yield components are the partial correlation between the significant negative correlation;The direct path coefficient of three yield components on yield is positive,which is the result of partial correlation analysis is consistent.According to the analysis and ecological conditions in Shandong Province and current characteristics of growing conditions,breeding and cultivation of wheat should be based on large groups of varieties of multi-spike-based,and to stabilize grains per spike,1000-grain weight increased.