比值性状的指数选择方法探讨

以构成幽会性状的两个组分性状为目标性状，以两个组分性状和与之存在较大相关的其它经济性状为信息性状，通过约束比值性状的遗传进展，给出了用于改良比值性状的遗传进展，给出了用于改良幽会性状的选择指数制订方法。该方法避开了直接选择幽会性状而在统计和选择效率方面所遇到的诸多麻烦，从而解决了性状的综合选择问题。以提高饲料效率的选择试验为例，演示了方法的使用过程，验证了方法的作用效果。

STUDY ON THE INDEX SELECTION METHOD FOR RATIO TRAIT

For restricting genetic progress of ratio trait,this paper puts forward a method for drawing up the selection index where aim traits are two component traits making up ratio trait,while informative traits are themselves and other economic traits.This method avoids a lot of trouble in the statistics and selection efficiency from directly selecting ratio trait,thereby solving the problem of comprehensive selection for ratio trait.An example that is the selection experiment for improving feed efficiency using the method was demonstrated.