数量性状超显性基因作用的研究

Research on effect of overdominant genes of quantitative traits

对以正交表形式表现的超显性基因共显性动物分子标记资料运用控制数量性状的超显性基因遗传模型配合了动物分子标记回归方程.结果表明,在一定的条件下,对以正交表形式表现的超显性基因共显性分子标记资料配合分子标记回归方程,可以对超显性基因的超显性系数加以估计,据此分子标记回归方程便可以实现从超显性基因到性状的诠释,亦可为预测动物的配合力提供遗传学基础、为动物杂种优势的利用提供理论依据.

In this article,a general analysis model using codominant molecular marker materials is established for discussing the overdominant gene's overdominant coefficient and the translating from additive gene's DNA segments to quantitative trait.The result shows:by this way,the overdominant gene's overdominant coefficient can be estimated by the coefficient of molecular marker regression equations fitting the orthogonal layout codominant molecular marker materials under some hypothetical conditions,and thus,a method and theory basis for translating overdominant gene to quantitative trait is presented,and a new method of forecasting the combining ability of animals and using the heterosis is supplied at the same time.