Economic Importance of pig traits in three-crossing system
|Cathegory||Publication in specialized journals|
The aim of the study was to determine the economic importance of the traits of pigs kept in a system with three-way crossing. The data of two maternal breeds of pigs: Czech Large White (CLW) in the maternal position and Czech Landrase (CL) in the paternal position; and one sire breed Large White sire line (LW) were used to calculate the economic weights. The production and economic data provided by cooperating pig breeders, the Pig Breeders Association and data from performance testing of pigs were used as a source of information. In the bio-economical model a production system with a three-way crossbreeding was used, where the gilts – hybrids of CLW x CL were mated by boars of the LW breed in order to create the final hybrids. A system with artificial insemination of sows was used with using of boars to stimulate ovulation of sows. The economic efficiency of the system was expressed as total profit per sow and year, calculated as the difference between total revenues and total costs. Revenues came from the sale of slaughter animals and culled sows, the export of breeding sows and the sale of boars to the semen collection centre. The payment of slaughter animals was based on the price per kg of carcass in the cold and depended on the classification of carcasses by weight and by lean meat. All breeds were operated in profit. Based on the relative economic weights of traits calculated in dam breeds the highest importance was found for: number of pigs born alive, feed conversion, conception rate of sows and dressing percentage (together 66% in both breeds). In the LW breed, average lifetime gain, dressing percentage, lean meat content and feed conversion (86% in total) were calculated as the most important traits. These traits should form the basis when the complex selection criteria are created.
Krupová Zuzana, Ing., Ph.D.
Žáková Eliška, Ing., Ph.D.
Wolfová Marie, Ing., Ph.D.
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