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Effects in genetic evaluation for semen traits in Czech Large White and Czech Landrace boars

Author

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  • J. Wolf

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

  • J. Smital

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

Abstract

Data on 75 567 ejaculates from 1 417 boars of the breeds Czech Large White and Czech Landrace collected in 23 AI centres between 2000 and 2007 were analyzed. Fixed effects were estimated from a four-trait animal model for semen volume, sperm concentration, motility and percentage of abnormal spermatozoa and from single-trait animal models for the total number of spermatozoa and the number of functional spermatozoa. Both the total number of spermatozoa and the number of functional spermatozoa were highest in winter and lowest in summer. Boar's age had a strong influence on semen volume, the total number and the functional number of spermatozoa; these traits increased especially in the first phase. The percentage of abnormal spermatozoa also increased with age. An interval between successive collections of 7 to 10 days yielded the best values for all semen traits. As semen traits are of direct economic importance for AI centres, it can be expected that the estimation of breeding value for semen traits will become important and that AI centres will choose among top boars for production and female reproduction traits the boars with better semen production.

Suggested Citation

  • J. Wolf & J. Smital, 2009. "Effects in genetic evaluation for semen traits in Czech Large White and Czech Landrace boars," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(8), pages 349-358.
    • Handle: RePEc:caa:jnlcjs:v:54:y:2009:i:8:id:1658-cjas
    DOI: 10.17221/1658-CJAS
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    References listed on IDEAS

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    1. J. Wolf & E. Žáková & E. Groeneveld, 2005. "Genetic parameters for a joint genetic evaluation of production and reproduction traits in pigs," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 50(3), pages 96-103.
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    Cited by:

    1. E. Krupa & E. Žáková & Z. Krupová & R. Kasarda & A. Svitáková, 2016. "Genetic relationship between management units of Czech dam pig breeds based on various types of data and pedigree information," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 61(2), pages 91-97.
    2. S. Frydrychová & J. Čeřovský & A. Lustyková & M. Rozkot, 2010. "Effects of long-term liquid commercial semen extender and storage time on the membrane quality of boar semen," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(4), pages 160-166.

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