安格斯牛断奶阶段生长发育性状的遗传参数估计  

Genetic Parameter Estimation of Growth and Developmental Traits in Angus Cattle During Weaning Stage

作　　者：王苏皖 冯小芳 佟丽佳 李德生 王瑜 封元 蒋秋斐 徐军 陈亚飞 顾亚玲[1] 张娟[1] WANG Suwan;FENG Xiaofang;TONG Lijia;LI Desheng;WANG Yu;FENG Yuan;JIANG Qiufei;XU Jun;CHEN Yafei;GU Yaling;ZHANG Juan(College of Animal Science and Technology,Ningxia University,Yinchuan 750021,China;Animal Husbandry Extension Station,Yinchuan 750001,China;Ningxia Nongken Group Co.,Ltd.,Yinchuan 750001,China;Yinchuan City Animal Husbandry Technology Extension Service Center,Yinchuan 750001,China)

机构地区：[1]宁夏大学动物科技学院,银川750021 [2]宁夏畜牧工作站,银川750001 [3]宁夏农垦集团有限公司,银川750001 [4]银川市畜牧技术推广服务中心,银川750001

出　　处：《中国畜牧兽医》2024年第6期2517-2523,共7页China Animal Husbandry & Veterinary Medicine

基　　金：宁夏安格斯牛核心群建设项目;宁夏肉牛种群高效利用及优异性状选育关键技术研究(2021BEF01002);自治区青年拔尖人才培养工程项目。

摘　　要：【目的】通过准确估计安格斯牛断奶阶段体重及体尺性状遗传参数,衡量肉牛断奶阶段的生长和发育潜力,为安格斯牛的遗传改良提供理论依据。【方法】本研究通过DMU软件的DMUAI模块,应用约束最大似然法(AI-REML)结合EM算法估计了宁夏地区7个安格斯肉牛养殖场的3 173头断奶阶段安格斯牛的体重及体尺性状的遗传参数。【结果】根据遗传力估计值高低的划分标准,安格斯牛断奶阶段体重(BW)、体高(BH)、十字部高(HCH)、体斜长(BL)、胸围(CG)、腹围(AC)和管围(CC)的遗传力均属于高遗传力性状(h~2≥0.40)。相关性结果显示,除管围与其他性状的遗传相关(―0.06~0.44)和表型相关(―0.07~0.35)呈负相关或弱正相关外,其余各性状间的遗传相关(0.31~0.79)和表型相关(0.30~0.81)均呈现正相关。【结论】安格斯牛的生长性状具有改善的潜力,在制定安格斯牛的育种方案时建议考虑该阶段的生长发育性状。【Objective】The aim of this study was to measure the growth and development potential of beef cattle by accurately estimating the genetic parameters of body weight and body size traits during weaning stage,so as to provide a theoretical basis for the genetic improvement of Angus cattle.【Method】The genetic parameters of body weight and body size traits of 3173 weaned Angus cattle from seven Angus beef farms in Ningxia were estimated by constrained maximum likelihood method(AI-REML)in combination with the EM algorithm,using the DMUAI module of DMU software.【Result】According to the criteria for high and low heritability estimates,the heritability of body weight(BW),body height(BH),hip cross height(HCH),body length(BL),chest girth(CG),abdomen circumference(AC)and cannon circumference(CC)in Angus cattle during weaning stage were classified as high heritability traits(h 2≥0.40).The correlation results showed that the genetic correlations(0.31-0.79)and phenotypic correlations(0.30-0.81)among the traits were positive,except for the genetic correlations(―0.06-0.44)and phenotypic correlations(―0.07-0.35)between CC and the other traits,which were negative or weakly positive.【Conclusion】There was potential for improvement in growth traits of Angus cattle.It was recommended to consider the growth and development traits during weaning stage when formulating the breeding plan for Angus cattle.

关 键 词：安格斯牛 断奶阶段 遗传参数 生长发育 

分 类 号：S813.24[农业科学—畜牧学]