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Selection indexes for bulls of beef cattle

Author

Listed:
  • P. Šafus

    (Research Institute of Animal Production, Prague-Uhříněves, Czech Republic)

  • J. Přibyl

    (Research Institute of Animal Production, Prague-Uhříněves, Czech Republic)

  • Z. Veselá

    (Research Institute of Animal Production, Prague-Uhříněves, Czech Republic)

  • L. Vostrý

    (Research Institute of Animal Production, Prague-Uhříněves, Czech Republic)

  • M. Štípková

    (Research Institute of Animal Production, Prague-Uhříněves, Czech Republic)

  • L. Stádník

    (Czech University of Agriculture, Prague, Czech Republic)

Abstract

Three selection indexes were constructed for bulls of beef cattle: IM for terminal crossing (in dairy herds), IZ for the selection of foundation sires for beef herd and IS for the selection of bulls for beef herd. Each index was constructed in five variants that differed in the number of used traits from the most important ones to all traits with known breeding values. The sources of information were breeding values routinely calculated in performance testing - 10 breeding values for direct and maternal effects for easy calving and growth, breeding value for daily gain of bulls at performance-testing stations and 10 breeding values for the type traits of young animals. The reliability of partial breeding values that enter into the indexes ranged from 11% to 36%. Reliability influences subsequent accuracy of index selection for total genotype that is in the range of 30% to 46%. The discounting of economic values (0% or 10%) did not influence the selection indexes significantly. Index selection was expressed almost exclusively in genetic gain of direct effects while maternal effects were of only small importance in the breeding objective. Direct effects for daily gain until weaning and after weaning are of the highest importance in the breeding objective, accounting for 90% to 96% of the total selection effect. The most important information sources in selection indexes are direct effect of weaning weight (importance of approximately 74% to 95%) and maternal effect of weaning weight (importance of approximately 5% to 7%). The inclusion of daily gain of bulls at performance-testing stations with the importance of about 16% in the index decreased the importance of weaning weight. Selection can be aimed at these main traits - calving ease (direct and maternal effect) and weight at 210 days (direct and maternal effect) only because the importance of the other traits in the index is very low.

Suggested Citation

  • P. Šafus & J. Přibyl & Z. Veselá & L. Vostrý & M. Štípková & L. Stádník, 2006. "Selection indexes for bulls of beef cattle," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 51(7), pages 285-298.
    • Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:7:id:3941-cjas
    DOI: 10.17221/3941-CJAS
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    References listed on IDEAS

    as
    1. 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.
    2. J. Přibyl & P. Šafus & M. Štípková & L. Stádník & V. Čermák, 2004. "Selection index for bulls of Holstein cattle in the Czech Republic," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 49(6), pages 244-256.
    3. P. Šafus & M. Štípková & L. Stádník & J. Přibyl & V. Čermák, 2005. "Sub-indexes for bulls ofHolsteinbreed in the Czech Republic," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 50(6), pages 254-265.
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    Cited by:

    1. Jan SYRUCEK & Jindrich KVAPILIK & Ludek BARTON & Mojmir VACEK & Ludek STADNIK, 2017. "Economic efficiency of suckler cow herds in the Czech Republic," Agricultural Economics, Czech Academy of Agricultural Sciences, vol. 63(1), pages 34-43.
    2. J. Ducháček & J. Přibyl & L. Stádník & L. Vostrý & J. Beran & L. Štolc, 2011. "Stability of Aberdeen Angus breeding values in the Czech Republic from 1997 to 2007," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 56(11), pages 509-520.
    3. Z. Veselá & J. Přibyl & L. Vostrý & L. Štolc, 2007. "Stochastic simulation of the influence of insemination on the estimation of breeding value and its reliability," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 52(8), pages 236-248.

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