中国肉用西门塔尔牛育种目标性状的选择及其经济权重的测算  

Selection of Objective Traits and Estimation of Economic Weights for Chinese Simmental Beef Cattle

作　　者：薛景龙 朱波[2] 张文刚[2] 夏江威 高会江[2] 李俊雅[2] 张国梁[1,3] 

机构地区：[1]吉林农业大学动物科学技术学院,长春130118 [2]中国农业科学院北京畜牧兽医研究所,北京100193 [3]吉林省农业科学院畜牧科学分院,公主岭136100

出　　处：《中国畜牧兽医》2016年第8期2120-2127,共8页China Animal Husbandry & Veterinary Medicine

基　　金：优质肉牛新品种(系)选育与关键技术研究及示范(2011BAD28B04);现代农业(肉牛)产业技术体系岗位科学家(CARS-38);松辽平原农牧结合循环技术集成与示范(2012BAD14B)

摘　　要：为了选育中国西门塔尔牛肉用品系,本研究从中国肉用西门塔尔牛育种实践出发,确定了适应当前中国肉用西门塔尔牛的育种目标性状和选择性状。采用差额法计算出各目标性状的边际效益,并通过各目标性状表型值的遗传标准差校正边际效益,得到相应育种目标性状的经济权重。结果表明,中国肉用西门塔尔牛近期的育种目标性状主要包括生长发育性状(断奶重、育肥期日增重、18月龄体重)、胴体性状(胴体品质、屠宰率、净肉率)及繁殖性状(初产年龄、产犊间隔和留群时间)。在现有市场和生产条件下,上述育种目标性状的边际效益分别为17.93元/kg、16.2元/kg、7.17元/kg、297.99元/级、497.82元/%、594.46元/%、-3.62元/d、-26.55元/d、232.75元/y,3类性状中生长发育性状、胴体性状及繁殖性状的经济权重之比为31.49%∶15.86%∶52.65%,约为2∶1∶3,繁殖性状占总经济权重最高,其次是生长发育性状和胴体性状。综上所述,在中国肉用西门塔尔牛育种过程中,繁殖性状具有最重要的地位,需加强繁殖性状的选择力度。In order to breed a beef line in Chinese Simmental cattle,this research defined breeding objective traits and selected traits according to real breeding condition of Chinese Simmental beef cattle.Using the balance method to calculate the marginal benefit of each objective trait and getting the corresponding economic weight of breeding objective traits through the standard value of the error corrected marginal benefit of breeding objective traits.The results showed that breeding objective traits mainly included growth traits（including weaning weight,fattening daily gain,18 th month weight）,carcass traits（including carcass quality,dressing percentage,pure meat percentage）as well as reproductive traits（including age at first calving,calving interval,stay group time）.In the current market and production conditions,the marginal benefit of the breeding objec-tive traits were 17.93yuan/kg,16.2yuan/kg,7.17yuan/kg,297.99yuan/grade,497.82yuan/%,594.46yuan/%,-3.62yuan/d,-26.55yuan/d and 232.75yuan/y,respectively,and the ratio of relative economic weights of three kinds of traits was 31.49% ∶15.86% ∶52.65%,similar to2∶1∶3,and reproductive traits occupied larger economic weight,was better than growth traits and carcass traits.The results indicated that reproductive traits played an important role in the process of breeding in Chinese Simmental beef cattle,and we needed to strengthen the selection of reproductive traits.

关 键 词：中国肉用西门塔尔牛 育种目标 经济权重 边际效益 

分 类 号：S823.92[农业科学—畜牧学]