A Method of Modelling Pig Breeding Schemes |
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Authors: | Dan Olsen Erling Sehested |
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Affiliation: | 1. Department of Animal Breeding and Genetics , Swedish University of Agricultural Sciences , Funbo-Lo¨vsta, Uppsala, SE-755 97, Sweden;2. Swedish Animal Health Service , P.O. Box 257, Uppsala, SE-751 05, Sweden;3. Department of Obstetrics and Gynaecology , Swedish University of Agricultural Sciences , P.O. Box 7039, Uppsala, SE-750 07, Sweden |
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Abstract: | Optimal use of limited resources as nucleus and testing capacity is important when organizing crossbreeding schemes in pigs. This paper introduces a method of modelling pig crossbreeding schemes consisting of nucleus, multiplier and commercial tiers. As an efficient alternative to the gene flow method (Hill, W.G. 1974. Anim. Prod. 18, 117-139), lag, original genetic level and annual genetic improvement for each line and cross are combined into one single evaluation criterion, the average discounted revenues of the breeding scheme. An optimum allocation of nucleus and testing capacity within breeding schemes, as well as an optimum solution between schemes can be found. As an example, the optimization of a four-way crossbreeding scheme is shown. the optimum allocation of nucleus capacity was 35% and 15% in each dam line and sire line, respectively. The corresponding figures for testing capacity were 23% and 27%. |
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Keywords: | Bayesian Analysis Heritability Lactation Failure Prolactin Swine |
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