探讨一种新的繁育方法——“血系繁育法”

根据育种理论和实践提出一种“血系繁育法”。该法可分为四个阶段:血系基础群的建立;血统维持与闭锁繁育;血统间的交叉选配;血统的重新组建。一个血系群包含2-3个独立血统,每个血统最少应有3头以上公猪与相应数量的母猪。同时制定了血统划分标准,论证了在血系繁育的一般情况下,选择效率是:个体选择>血统内选择>血统选择。还设计了非近交的循环交配模式。

STUDIES ON A NEW METHOD OF BREEDING NAMED "BLOOD RELATION BREEDING"

This paper, based on the practice and theory of breeding, attemptsto introduce a new breeding method named "Blood Relation Breeding" (BRB). Themethod includes four phases which are the establishment of the basic populationof the BRB, the successive blood line maintenance in generations and closed breedingwithin the blood lines,the selective mating between blood lines,and the reconstructionof blood lines. A foundation population of the BRB consists of 2 or 3 independentblood lines each with no less than 3 boars and corresponding number of sows. It alsomakes criteria for setting up blood lines. In general, under the condition of the BRB,the efficiency of selection is Ri (response to individual selection)>Rbw(responseto selection withion blood lines)>Rb(response to selection among blood lines).Meanwhile, the mode, namely rotation mating for noninbred is designed as well.