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为了明确小麦主要数量性状之间的相关关系以及各性状对单穗粒重的贡献大小，本试验选用了２０个小麦品种（系），针对１５个主要数量性状进行了研究．结果表明：单穗粒重、千粒重、每穗粒数、第１节长的遗传力很高；每穗粒数与单穗粒重呈极显著正相关，株高、千粒重、第１节、第２节与单穗粒重呈显著正相关；株高、Ｉ２、每穗小穗数、千粒重对单穗粒重的遗传直接通径为正贡献，每穗粒数、第１节、ＩＬ、第２节通过Ｉ２，穗长通过每穗小穗数对单穗粒重的间接贡献较大。
In order to clarify the correlation between the major quantitative traits of wheat and the contribution of each trait to the grain weight of a single ear, 20 wheat cultivars (lines) were selected in this study and 15 major quantitative traits were studied. The results showed that grain weight per plant, grain weight per plant, grain number per spike and length of section 1 were very high. Grain number per spike was extremely significantly and positively correlated with grain weight per plant, plant height, grain weight per plant, There was a significant positive correlation between the grain weight and the grain weight per spike. The plant height, I2, spikelet number per panicle, and 1000-grain weight contributed positively to the direct path of grain weight per spike. The grain number per spike, Section 2 through I2, spike length by spikelets per spike per grain weight indirect contribution.