S·Wright(1921年)提出的通径分析法,国外已广泛应用于动物育种和遗传研究中.近年来我国不少农业科研工作者在植物育种方面也应用了这一方法.小麦、玉米、大豆等作物的性状与其产量间的通径分析国内已有报道,但冬小麦产量与其旗叶节以上性状间的通径分析尚未见报道.本文根据四川农学院明道绪等关于性状相关的通径分析方法,就冬小麦产量与其旗叶节以上四个性状进行了相关和通往分析,估测了这些性状对产量的直接和间接影响程度. Path analysis method proposed by S. Wright (1921) has been widely used abroad in animal breeding and genetic research.In recent years, many agricultural researchers in our country have also applied this method in plant breeding.Wheat, corn, The path analysis between the traits of soybean and other crops and their yield has been reported in China, but the path analysis between the yield of winter wheat and the above traits of flag leaf has not been reported yet.In this paper, based on the path analysis of traits related to traits such as Mingdao Xu of Sichuan Agricultural College Method was used to analyze the correlation between winter wheat yield and the above four traits of flag leaf nodes and estimate the direct and indirect effects of these traits on the yield.