Czech J. Anim. Sci., 2005, 50(3):96-103 | DOI: 10.17221/4001-CJAS

Genetic parameters for a joint genetic evaluation of production and reproduction traits in pigs

J. Wolf1, E. Žáková1, E. Groeneveld2
1 Research Institute of Animal Production, Prague-Uhříněves, Czech Republic
2 Institute for Animal Breeding, Mariensee, Federal Agricultural Research Centre (FAL), Neustadt, Germany

The covariance structure was estimated by REML for a joint genetic evaluation of production and reproduction traits for Czech Landrace (58 258 records) and Czech Large White (167 161 records) pigs using four-trait animal models. The following traits were analysed: lean mean percentage at the end of the performance test in the field, estimated from ultrasonic measurements unadjusted for live weight (LM), average daily gain in field test (in g/day) calculated as weight at the end of the test divided by age at the end of the test (ADG), number of piglets born alive in parity 1 (NBA1) and number of piglets born alive in parity 2 and subsequent parities (NBA2+). The heritabilities were in the range from 0.30 to 0.37 for LM, from 0.13 to 0.18 for ADG, from 0.09 to 0.13 for NBA1 and from 0.10 to 0.14 for NBA2+, depending on the breed and on the model (herd-year-season random or fixed). Genetic correlations between production and reproduction traits were estimated to be non-zero. Correlations between traits caused by the herd-year-season effect were mostly positive. As a general conclusion, the joint genetic evaluation of production and reproduction traits is recommended. The herd-year-season effect should be preferably considered as random.

Keywords: pig; production traits; reproduction traits; multi-trait animal model; genetic parameters

Published: March 31, 2005  Show citation

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Wolf J, Žáková E, Groeneveld E. Genetic parameters for a joint genetic evaluation of production and reproduction traits in pigs. Czech J. Anim. Sci. 2005;50(3):96-103. doi: 10.17221/4001-CJAS.
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