The use of meat breeds of pigs of foreign selection to obtain young hybrids of high performance

Abstract

The experiments revealed that crossing sows of LW × BM with hybrid boars of D × P and L × D and sows of BM × LW with boars of D × P increases multiple pregnancy, litter weight at birth, milk yield and number of piglets at weaning by 8,7-12,5 %, 12,1-21,2, 6,4-8,8 and 3,2-4,2 %, respectively, compared to the three-breed variant (LW × BM) × L. It was determined that rearing of young hybrids obtained from mating sows of LW × BM with hybrid boars of D × P and L× D allows to reduce the fattening time period for young animals by 2-5 days and reduce feed costs by 10-20 g compared to the control. Crossing sows of LW × BM with hybrid boars of D × P and L × D and sows of BM × LW with boars of D × P promotes decrease of back fat thickness by 8,3-15 %, increase of carcasses meatiness by 3,3-4,4 %, decrease of the proportion weight of the shoulder-blade cut that is the least valuable part of the carcass due to the simultaneous increase of more valuable - dorsal-rib and the rear third part of carcass, compared to the relevant parameters of three-breed variant (LW × BM) × L.