Journal
MEAT SCIENCE
Volume 80, Issue 4, Pages 1138-1149Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2008.05.026
Keywords
Lambs; Carcass composition; Meat quality; Computed tomography
Categories
Funding
- Scottish Government
- Defra
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Live weight, subjective scores of condition and conformation, live animal video image analysis (LVIA), ultrasound and X-ray computed tomography (CT) scanning were used to investigate the best method or combination of methods for predicting carcass and meat quality traits in live Texel and Scottish Black-face lambs. Predictors derived from CT alone accounted for a high proportion of the variance in dissected fat and muscle weight in Texel lambs (adjusted R-2 = similar to 0.8), as well as intra-muscular fat content in the loin (similar to 0.6), but lower proportions in Blackface lambs (similar to 0.7 for fat, 0.4-0.5 for muscle and intra-muscular fat), after adjusting for sire and fixed effects. Adding traits measured by other in vivo methods increased prediction accuracies (adjusted R-2) by up to 0.26, depending on trait and data set. Shear force and ultimate pH could not be accurately predicted using the traits considered here (adjusted R-2 < 0.4). Although the same methods tended to be best for predicting product quality traits between breeds, prediction accuracies differed. (c) 2008 Elsevier Ltd. All rights reserved.
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