During the production of the Siberian type of Black-and-White cattle groups of animals different in Holstein thorough-breediness were obtained. The animals with over 75% breediness yielded 5244-6424 kg of milk, the content of butterfat and protein being 4.0 - 4.15% and 3.23 - 3.3%, respectively. The indexes were higher than those in other groups of cows. The increased Holstein breediness was observed to bring about significant variations in the frequency of individual erythrocyte antigens.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 23: Opening: plenary; technology; transfer; beef cattle; dairy cattle; pigs., , 475–477, 1998
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