冬小麦重要的经济性状都表现为数量性状。这些性状一方面受遗传因子的支配,另方面受环境的影响,在选育过程中就难于根据表现型决定取舍。 梅赛尔提出多基因假说,认为每种数量性状决定于许多微效基因。这种基因愈多,则传递能力愈强。这种遗传传递力,可以变异量比率来表示。这是研究数量性状遗传规律韵新方向。 Important economic traits of winter wheat are characterized by quantitative traits. On the one hand, these traits are dominated by genetic factors. On the other hand, the traits are influenced by the environment. Therefore, it is difficult to choose the phenotype according to the phenotype during breeding. Maaseil proposed a multi-gene hypothesis that each quantitative trait is determined by many of the minor genes. The more this gene, the stronger the ability to pass. This genetic transmission power, can be expressed as the ratio of the amount of variation. This is a new direction for the study of the genetic law of quantitative traits.