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Linear and linear-threshold model for genetic parameters for SEUROP carcass traits in Czech beef cattle

Author

Listed:
  • Z. Veselá

    (Institute of Animal Science, Prague-Uhříněves, Czech Republic)

  • L. Vostrý

    (Institute of Animal Science, Prague-Uhříněves, Czech Republic)

  • P. Šafus

    (Institute of Animal Science, Prague-Uhříněves, Czech Republic)

Abstract

The objective of this study was to estimate genetic parameters for the results of classifying of carcass traits by the SEUROP method in beef cattle in the Czech Republic using linear and linear-threshold models. Genetic parameters were calculated and evaluated in a set of 4276 animals of eleven beef breeds and crosses with dairy and dual-purpose breeds (Aberdeen Angus - 1376, Hereford - 994, Simmental - 651, Charolais - 524, Piemontese - 185, Galloway - 162, Blonde d'Aquitaine - 147, Limousine - 106, Highland - 53, Gasconne - 44, Belgian Blue - 34) in 2005-2008. Aberdeen Angus, Hereford, Charolais and beef Simmental were the most numerous breeds. Fixed effect of a classifier, fixed regression on age at slaughter by means of Legendre polynomial of the second degree separately for the each breed and sex and fixed regression on heterosis coefficient were included in a model equation. Genetic parameters were estimated by a multi-trait animal model using a linear model and a linear-threshold model in which carcass weight (CW) was considered as the linear trait and carcass conformation (CC) and carcass fatness (CF) grading as threshold traits. The heritability coefficient for CW differed only moderately according to the method of the genetic parameter estimation (0.295 in linear model and 0.306 in linear-threshold model). The heritability coefficient for CC was 0.187 in linear model and 0.237 in linear-threshold model. The heritability coefficient for CF grading was 0.089 in linear model and 0.146 in linear-threshold model. Genetic correlation between CW and CC was high (0.823 in linear model and 0.959 in linear-threshold model), the correlation between CW and CF was intermediate (0.332 and 0.328, respectively) and it was low between CF and CC (0.071 and 0.053). If CW was included in the model equation as fixed regression using Legendre polynomial, lower heritability coefficients for CC (0.077 and 0.078) and CF (0.086 and 0.123) were calculated and the correlation between CC and CF was negative (-0.430 and -0.429).

Suggested Citation

  • Z. Veselá & L. Vostrý & P. Šafus, 2011. "Linear and linear-threshold model for genetic parameters for SEUROP carcass traits in Czech beef cattle," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 56(9), pages 414-426.
    • Handle: RePEc:caa:jnlcjs:v:56:y:2011:i:9:id:1292-cjas
    DOI: 10.17221/1292-CJAS
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    References listed on IDEAS

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    1. J. Přibyl & H. Krejčová & J. Přibylová & I. Misztal & J. Bohmanová & M. Štípková, 2007. "Trajectory of body weight of performance tested dual-purpose bulls," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 52(10), pages 315-324.
    2. Z. Veselá & J. Přibyl & P. Šafus & L. Vostrý & K. Šeba & L. Štolc, 2005. "Breeding value for type traits in beef cattle in theCzech Republic," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 50(9), pages 385-393.
    3. H. Kamieniecki & J. Wójcik & R. Pilarczyk & K. Lachowicz & M. Sobczak & W. Grzesiak & P. Błaszczyk, 2009. "Growth and carcass performance of bull calves born from Hereford, Simmental and Charolais cows sired by Charolais bulls," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(2), pages 47-54.
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    Cited by:

    1. L. Vostrý & Z. Veselá & A. Svitáková & H. Vostrá vydrová, 2014. "Comparison of models for estimating genetic parameters and predicting breeding values for birth weight and calving ease in Czech Charolais cattle," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 59(7), pages 302-309.
    2. A. Svitáková & J. Bauer & J. Přibyl & Z. Veselá & L. Vostrý, 2014. "Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 59(1), pages 19-25.

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