各种作物的产量都是由一定的产量因素所组成,如小麦的产量由单位面积穗数,每穗粒数、粒重等因素组成。但是不同地区、不同历史时期、不同品种,这些组成因素对产量的贡献大小有所不同。如果对当地历史上推广过的品种进行产量因素与产量之间的遗传相关研究,可以了解在品种更换过程中产量因素历史演变的真实情况,可为正确制订育种目标提供参考依据。遗传相关的研究,只是说明了两个因素之问的简单相关。而构成产量的因素很多,不但产量同时受其他一些因素的影响,而且 The yield of various crops is composed of certain yield factors. For example, the yield of wheat consists of the number of ears per unit area, the number of grains per panicle, the grain weight and other factors. But in different regions, different historical periods and different breeds, the contribution of these components to the output varies. If the genetic correlation between the yield factors and the yield of the varieties popularized in the local history can be studied, the actual situation of the historical evolution of the yield factors in the process of variety change can be understood, which can provide a reference for correctly formulating breeding objectives. Genetically related research simply illustrates the simple correlation between two factors. The factors that make up a lot of output, not only output at the same time by some other factors, and