EVALUATION OF NEW VARIANTS OF BREED-AND-LINEAR HYBRIDS FOR INDUSTRIAL COMPLEXES WITH IMPORTED BREEDS OF BOARS

It was determined that crosses of hybrid sows of LW×Y and L×LW with hybrid boars of L×D boars had a positive effect on increase in multiple pregnancy, milk yield and number of piglets at weaning by 3.5-4.4 %, 4.5-5.8 and 3.7-6.5 % compared to the best two-breed variant LW×L. Duroc boars use as paternal form in combination with cross-bred sows of LW×BM and BM×L has negative effect on the reproductive traits of sows (reduces multiple pregnancy by 10.8 %, milk yield by 2.6-4.2 %, number of piglets - by 14.7-16.3 %, litter weight by weaning by 19.4-21.5 % compared to sows of similar origin in combination with boars of Landrace breed. It was determined that final hybrids obtained as a result of crossing the hybrid sows of LW×Y and L×LW with hybrid boars of L×D were significantly superior to the best two-breed variant LW×L in terms of fattening traits (the age of reaching 100 kg is 8.5-9.4 %, the average daily weight gain is 12,0-13,1 %, feed costs per 1 kg of weigh gain lower by 4,7-6,2 %). Three-breed hybrids (BM×L)×D and (BM×L)×L showed good fattening traits with an average daily weight gain of 801-803 g at feed costs of 3.38-3.40 kg per 1 kg of weight gain. According to physical properties, the meat of young pigs of experimental and control groups at the both farms can be classified as good quality pork suitable for processing.

heterosis, hybrid, breed, reproductive traits, average daily weight gain, fattening traits, morphological composition of carcass, large white breed, Belarusian meat breed, duroc, landrace, pietrain

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