新疆褐牛育种目标性状边际效益的计算

Study on Marginal Profits of Breeding Objective for Xinjiang Brown Cattle

为探讨新疆褐牛育种目标性状的相对选择重要性,为今后新疆褐牛良种选育和综合选择指数的制定奠定基础,本研究采用差额法和系统分析法,基于新疆褐牛当前生产水平和市场价格体系,对新疆褐牛3类性状10个育种目标的边际效益进行了评估,结果表明:新疆褐牛乳用性状、肉用性状和功能性状的相对经济重要性比例为36∶34∶30,近似于1∶1∶1,其中产奶量、日增重、18月龄体重和生产寿命4个性状的相对权重最大,分别为27.2、19.4、12.9和10.3。本研究结果符合新疆褐牛实际生产情况,在加强乳用和肉用性能选育的同时还应该重视功能性状的选择,以平衡育种为主加快新疆褐牛遗传进展,提高育种效率,增加育种效益。

In order to study the relative breeding importance of breeding objective and establish foundation to comprehensive selection index for Xinjiang brown cattle, breeding objective＇s marginal benefit were evaluated by balancing method and system analysis method based on the current production level and market price system. The relative economic importance of milk traits, meat traits and functional traits were 36：34：30, similar to l：l：l.The relative weight of milk yield, daily gain, eighteen month body weight and production life were 27.2, 19.4, 12.9 and 10.3 respectively. The result is consistent with the actual production situation of Xinjiang brown cattle, the breeders should pay more attention to the function trait while strengthen the selection to milk and meat performance.