选育矮杆抗倒品种,是六十年代以来国内外提高小麦产量的主要途径之一.许多研究表明:提高矮杆品种的产量,主要是通过提高经济系数、抗倒伏能力以及增加施肥量和肥料利用率面获得增产效应.但是矮杆品种往往由于株高降低容易感病,落黄不正常,产量性状也随之发生变化,如每穗粒数、千粒重下降、籽粒不饱等而使产量降低.因此,研究株高与产量性状间的关系,分析不同类型品种产量构成因素间的相互关系,有助于对确定选育品种的适宜高度,明 Breeding dwarf bar-resistant varieties is one of the main ways to increase wheat yield both at home and abroad since the 1960s.Many studies have shown that increasing the yield of dwarf bar varieties is mainly through improving the economic coefficient, lodging resistance and increasing the amount of fertilizers Fertilizer utilization rate increased yield effect.But the dwarf varieties are often susceptible to disease due to lower plant height, falling yellow is not normal, yield traits also will change, such as grain number per panicle, grain weight decreased, grain yield and so yield Therefore, studying the relationship between plant height and yield traits, and analyzing the relationship between the yield components of different types of cultivars will be helpful to determine the appropriate height of breeding varieties