Genetic parameters for carcass composition and performance data in crossbred lambs measured by Video Image Analysis

被引：5
作者：
Rius-Vilarrasa, E. [1 ]
Buenger, L. [1 ]
Brotherstone, S. [2 ]
Matthews, K. R. [3 ]
Haresign, W. [4 ]
Macfarlane, J. M. [1 ]
Davies, M.
Roehe, R. [1 ]
机构：
[1] Scottish Agr Coll, Sustainable Livestock Syst Grp, Edinburgh EH9 3JG, Midlothian, Scotland
[2] Univ Edinburgh, Sch Biol Sci, Edinburgh EH9 3JT, Midlothian, Scotland
[3] EBLEX Ltd, Milton Keynes MK6 1AX, Bucks, England
[4] Aberystwyth Univ, Inst Biol Environm & Rural Sci, Ceredigion SY23 3AL, Wales
来源：
MEAT SCIENCE | 2009年 / 81卷 / 04期
基金：
英国生物技术与生命科学研究理事会;
关键词：
Video Image Analysis; Lamb carcass; Meat yield; Genetic parameters; Performance data; RAY COMPUTER-TOMOGRAPHY; LEAN MEAT PRODUCTION; TERMINAL SIRE SHEEP; IN-VIVO; ULTRASONIC MEASUREMENTS; LIVE WEIGHT; FAT DEPTHS; TRAITS; SELECTION; GROWTH;
D O I：
10.1016/j.meatsci.2008.10.020
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
A total of 7074 crossbred lambs, produced by mating crossbred Mule ewes with terminal sire rams were used in this study. Of these, 630 were scanned using a Video Image Analysis (VIA) to estimate carcass quality traits. Genetic parameters for average daily gain (ADG), scanning live weight (SW), ultrasonic measures of muscle (UMD) and fat (UFD) depths, cold carcass weight (CCW) and VIA measurements of primal carcass joint weights (LEG, CHUMP, LOIN, BREAST and SHOULDER) were estimated using multivariate animal models. Additionally, VIA traits were evaluated under a repeatability model, considering the primal joints as repeated measures of the same trait. Direct heritability estimates were low to moderate (0.08-0.26) for VIA measurements of primal joints. Repeatability estimates for VIA traits were high (>0.90). Moderate to high heritability estimates (0.25-0.55) were found for performance traits (ADG, SW, UMD and UFD) and CCW. Genetic correlations between VIA traits and ADG were strong (0.75-0.93). Most of the VIA traits were highly correlated to SW (0.60-0.97). UFD was significantly negatively correlated with UMD (-0.22), ADC (-0.18) and CCW (-0.18). The results of this study suggest that selection on performance and carcass traits, measured by VIA, could possibly improve primal meat yield of carcass cuts without increasing the overall carcass fatness. High repeatability estimates of VIA traits and moderate heritabilities of the most valuable carcass joints Suggests that including VIA information in breeding programs would be useful in order to improve carcass quality. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：619 / 625
页数：7
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