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Trajectory of body weight of performance tested dual-purpose bulls

Author

Listed:
  • J. Přibyl

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

  • H. Krejčová

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

  • J. Přibylová

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

  • I. Misztal

    (Univesity Georgia, Athens, USA)

  • J. Bohmanová

    (University Guelph, Canada)

  • M. Štípková

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

Abstract

6 508 bulls of dual-purpose cattle at performance-test stations were weighed at intervals of 30 days from birth to 420 days. After all editing a total of 74 558 weight records were available. Live weight was evaluated by orthogonal Legendre Polynomial (LP) of degree 4 and by Linear Spline function (SP) with 5 knots. The fixed effects of test-day-year-station of weighing (TDS) and LP within station-year explain together 97% of variability. Variance components were estimated by REML (REMLF90 programme) taking into account heterogeneous variance during growth. The basic model included fixed effects: TDS, and fixed regression on age (LPF), and random regression for additive genetic (SPG) and permanent environmental of the animal (SPPE) effects. Variability of all components increases with age. During the 50-400 day period the heritability is 0.28 on average. Heritability increases with the age of the animal; it is the highest at the end of the period. Correlations for body weights between different ages of the animal are high.

Suggested Citation

  • 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.
    • Handle: RePEc:caa:jnlcjs:v:52:y:2007:i:10:id:2340-cjas
    DOI: 10.17221/2340-CJAS
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    References listed on IDEAS

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    1. A. Kor & E. Baspinar & S. Karaca & S. Keskin, 2006. "The determination of growth in Akkeci (White goat) female kids by various growth models," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 51(3), pages 110-116.
    2. D. Rasch & O. Mašata, 2006. "Methods of variance component estimation," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 51(6), pages 227-235.
    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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    1. J. Přibyl & J. Přibylová & H. Krejčová & N. Mielenz, 2008. "Comparison of different traits to evaluate the growth of bulls," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(7), pages 273-283.
    2. A. Novotná & A. Svitáková & J. Schmidová, 2015. "Comparison of models to estimate genetic parameters for scores of competitive sport horse events in the Czech Republic," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 60(9), pages 383-390.
    3. H. Krejčová & J. Přibyl & J. Přibylová & M. Štípková & N. Mielenz, 2008. "Genetic evaluation of daily gains of dual-purpose bulls using a random regression model," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(6), pages 227-237.
    4. 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.

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