关键词: 育种方案, 鲁西黄牛, 育种效率

Abstract: On the basis of the current two-tire nucleus breeding scheme and young bull system for Luxi cattle,deterministic simulation was used to evaluate the breeding efficiency of current scheme.The factors on breeding results of current scheme were analyzed.The results show that only enlarge population and increase nucleus size,it will increase genetic gains and profit,and increasing ratio of seed cow,it will slowly decrease genetic gains and profit after reaching climax.Enlarge number of test bulls;it will increase slowly genetic gains and profit.And widen open degree,it will increase slowly genetic gains and profit after reaching climax.These results suggest that breeding efficiency will be increased by optimizing current breeding scheme.

Key words: breeding scheme, Luxi cattle, breeding efficiency