鲁西黄牛肉用品系的选择方案评估  

Evaluation of Selection Schemes for Beef Line of Luxi Cattle

作　　者：张清峰[1,2] 许尚忠[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所农业部畜禽遗传资源与利用重点开放实验室,北京100193 [2]菏泽学院动物科学系,菏泽274015

出　　处：《畜牧兽医学报》2009年第4期459-467,共9页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家科技支撑计划重大项目(2006BAD01A10)

摘　　要：在现行鲁西黄牛肉用品系青年公牛体系和二阶开放核心群育种方案的基础上,根据不同可利用记录作为不同的选种标准。通过超声波扫描周岁活体牛眼肌面积和背膘厚,测定犊牛断奶后第28、42和56天血浆中IGF-Ⅰ平均浓度,将它们作为胴体性状选择的早期记录,设定4种选择方案,采用确定性模型从遗传和经济角度评估这些方案的育种效果。结果表明,以现行方案(方案1)为参照,超声波选择方案(方案2)、IGF-Ⅰ选择方案(方案3)以及超声波和IGF-1组合方案(方案4)的指数准确性、遗传进展和育种效益分别提高了0.19、39.05%、63.60%,0.01、25.55%、14.90%和0.21、40.68%、64.08%。以上数据说明,将超声波活体扫描和IGF-Ⅰ浓度测定应用到育种方案中可获得相对理想的育种效果。On the basis of the current two-tire nucleus breeding scheme and young bull system for beef line of Luxi cattle,the backfat thickness and eye muscle area of rib scanned in yearling live cattle and mean concentration of IGF-Ⅰin plasma at 28th,42nd and 56th day of post-weaning period in calf were used as early records of carcass traits in this study.Four selection schemes which differed in the records available for use as selection criteria were defined,and deterministic simulation was used to evaluate 4 selection schemes for breeding efficiency.The results showed that taking if the scheme 1（current scheme） contrast with other schemes,then index accuracy,genetic gains per year and profitability were improved 0.19,39.05% and 63.60% for scheme 2;0.01,25.55% and 14.90% for scheme 3;0.21,40.68% and 64.08% for scheme 4.According to the results,the schemes taking the ultrasound scanning and IGF-Ⅰas selection criteria would get more ideal breeding efficiency in the breeding schemes.

关 键 词：鲁西黄牛 育种方案 超声波扫描 IGF-Ⅰ 

分 类 号：S823.81[农业科学—畜牧学] S813.2[农业科学—畜牧兽医]