Reproductive traits of Duroc breed boars of Canadian and Belarusian selection in breeding and hybrid centers conditions

Abstract

It is determined that the Belarusian Duroc breed boars under the age of 7 months had a significant advantage over their coevals from Canada in the volume of ejaculate by 2,8 % (P ≤ 0,05), the concentration of sperm cells - by 10 % (P ≤ 0,05), on spermatozoa survival - by 12,5%. On reproductive traits there was a tendency to reduce the multiple pregnancy in sows of Belarusian type of Duroc breed, compared with coevals from Canada, by 1,1 % but the yield of the high technology piglets output from Belarusian sows was higher than that of coevals. Sows of Belarusian selection significantly surpassed on similar indicators of Canadian ones on litter weight - by 0,6 kg, or 4,95 % (P ≤ 0,05), on weight of 1 piglet - by 0,18 kg, or 5,4 % (P ≤ 0,05). Thus, it was determined that the imported animal of Duroc breed in the adaptation period were exposed to stress in the new environment, but the stress response was not calling any serious changes and disorders in animals and has not led to a sharp decrease in the reproductive traits.