Englishby Tanya M, Moore Kirsty L, Berry Donagh P, Coffey Mike P, Banos Georgios
Scotland's Rural College (SRUC), Easter Bush, Midlothian, Scotland EH25 9RG, UK; Animal & Grassland Research and Innovation Centre, Teagasc, Moorepark, Co. Cork, Ireland.
Scotland's Rural College (SRUC), Easter Bush, Midlothian, Scotland EH25 9RG, UK.
Meat Sci. 2017 Jul;129:188-196. doi: 10.1016/j.meatsci.2017.03.005. Epub 2017 Mar 7.
Abattoir data are an important source of information for the genetic evaluation of carcass traits, but also for on-farm management purposes. The present study aimed to quantify the contribution of herd environment to beef carcass characteristics (weight, conformation score and fat score) with particular emphasis on generating finishing herd-specific profiles for these traits across different ages at slaughter. Abattoir records from 46,115 heifers and 78,790 steers aged between 360 and 900days, and from 22,971 young bulls aged between 360 and 720days, were analysed. Finishing herd-year and animal genetic (co)variance components for each trait were estimated using random regression models. Across slaughter age and gender, the ratio of finishing herd-year to total phenotypic variance ranged from 0.31 to 0.72 for carcass weight, 0.21 to 0.57 for carcass conformation and 0.11 to 0.44 for carcass fat score. These parameters indicate that the finishing herd environment is an important contributor to carcass trait variability and amenable to improvement with management practices.
屠宰场数据是胴体性状遗传评估的重要信息来源，也是农场管理的重要信息来源。本研究旨在量化牛群环境对牛肉胴体特征（重量、体型评分和脂肪评分）的贡献，特别强调针对不同屠宰年龄生成特定育肥牛群的这些性状概况。分析了46115头360至900日龄的小母牛、78790头360至900日龄的阉牛以及22971头360至720日龄的小公牛的屠宰场记录。使用随机回归模型估计每个性状的育肥牛群年度和动物遗传（协）方差分量。在不同的屠宰年龄和性别中，育肥牛群年度方差与总表型方差的比率，胴体重量为0.31至0.72，胴体体型为0.21至0.57，胴体脂肪评分为0.11至0.44。这些参数表明，育肥牛群环境是胴体性状变异的重要因素，并且可以通过管理措施加以改善。
