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    Genetic relationships between carcass cut weights predicted from video image analysis and other performance traits in cattle

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    Author
    Pabiou, Thierry
    Fikse, W. F.
    Amer, P. R.
    Cromie, A. R.
    Nasholm, A.
    Berry, Donagh cc
    Keyword
    Beef cattle
    Genetic correlations
    VIA
    Carcass cuts
    Price
    Date
    2012-04
    
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    URI
    http://hdl.handle.net/11019/395
    Citation
    T. Pabiou, W. F. Fikse, P. R. Amer, A. R. Cromie, A. Näsholm and D. P. Berry (2012). Genetic relationships between carcass cut weights predicted from video image analysis and other performance traits in cattle. animal, 6, pp 1389-1397. doi:10.1017/S1751731112000705
    Abstract
    The objective of this study was to quantify the genetic associations between a range of carcass-related traits including wholesale cut weights predicted from video image analysis (VIA) technology, and a range of pre-slaughter performance traits in commercial Irish cattle. Predicted carcass cut weights comprised of cut weights based on retail value: lower value cuts (LVC), medium value cuts (MVC), high value cuts (HVC) and very high value cuts (VHVC), as well as total meat, fat and bone weights. Four main sources of data were used in the genetic analyses: price data of live animals collected from livestock auctions, live-weight data and linear type collected from both commercial and pedigree farms as well as from livestock auctions and weanling quality recorded on-farm. Heritability of carcass cut weights ranged from 0.21 to 0.39. Genetic correlations between the cut traits and the other performance traits were estimated using a series of bivariate sire linear mixed models where carcass cut weights were phenotypically adjusted to a constant carcass weight. Strongest positive genetic correlations were obtained between predicted carcass cut weights and carcass value (min rg(MVC)50.35; max rg(VHVC)50.69), and animal price at both weaning (min rg(MVC)50.37; max rg(VHVC)50.66) and post weaning (min rg(MVC)50.50; max rg(VHVC)50.67). Moderate genetic correlations were obtained between carcass cut weights and calf price (min rg(HVC)50.34; max rg(LVC)50.45), weanling quality (min rg(MVC)50.12; max rg(VHVC)50.49), linear scores for muscularity at both weaning (hindquarter development: min rg(MVC)520.06; max rg(VHVC)50.46), post weaning (hindquarter development: min rg(MVC)50.23; max rg(VHVC)50.44). The genetic correlations between total meat weight were consistent with those observed with the predicted wholesale cut weights. Total fat and total bone weights were generally negatively correlated with carcass value, auction prices and weanling quality. Total bone weight was, however, positively correlated with skeletal scores at weaning and post weaning. These results indicate that some traits collected early in life are moderate-to-strongly correlated with carcass cut weights predicted from VIA technology. This information can be used to improve the accuracy of selection for carcass cut weights in national genetic evaluations.
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.1017/S1751731112000705
    Scopus Count
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    Animal & Bioscience

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