A. APOSTOLOV and S. SLANEV
Agricultural Institute, BG-9700 Shumen, Bulgaria
APOSTOLOV, A. and S. SLANEV, 2002. Estimation models and prediction of economic weights of selection indices in pigs. Bulg. J. Agric. Sci., 417–420
The estimation models of the economic weights have been developed on the basis of production results from the Experimental base at the Agricultural Institute. The expenses per one fattened pig (without the food cost) amount to 30% of the total expenses whereas in sows they are 43%.
The economic weights have been determined on the basis of the deviation by a unit from the mean values of the selection traits, measured through the expenses necessary for them. The basic factors influencing the estimation of the economic weights are the total gain and the end liveweight which give a possibility to an adequate reaction towards the market changes. The choice of selection objective has a determining role in long-term perspective whereas the economic weights of the chosen selection criteria have a limiting effect.