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Data on morphological carcass composition study in both purebred and mixed bred bull-cal-ves, obtained from crossing black-and-white cows with Aberdeen-Angus and Charolais bulls, are provided in the article. It has been discovered that the carcasses mass of bull-calves increased with age due to more intensive. Lean part growth and skeleton to a lesser degree, Bull-calves, genotype has an important influence on muscu-lar system growth. Inherited potential in musculature growth is better realized in Charolais mongrel bull-calves, the degree of muscular component being 253.6 kg at the age of 18 months, which is by 31.5% bigger than in they black-and-white herdmates. There are no big differences in carcass muscular tissue weight between Aberdeen-Angus crossbreeds and black-and-white Bull-calves. The greatest adipopexis growth by the end of the experiment is a characteristic feature of Aberdeen-Angus crossbreeds. The skeleton growth rate of young animals by comparison during the experimental period is practically the same, but with age the skeleton growth rate decreases significantly in bull-calves.

I P Prohorov

Principal contact for editorial correspondence.
Russian State Agrarian University - Moskov state agricultural akademy named after K.A. Timiryazev Timiryazevskaya st., 49, Moscow, Russia, 127550

Прохоров Иван Петрович - доктор сельскохозяйственных наук, профессор кафедры мясного и молочного скотоводства Московской государственной академии имени К.А. Тимирязева

D V Nikitchenko
RUDN University (Peoples’ Friendship University of Russia) Miklukho-Maklaya st., 6, Moscow, Russia, 117198

Никитченко Дмитрий Владимирович - доктор биологических наук, профессор департамента ветеринарной медицины Аграрно-технологического института Российского университета дружбы народов

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Copyright (c) 2017 Prohorov I.P., Nikitchenko D.V.

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