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.

A. I Zheltikov, V. L Petukhov, B. L Panov, A. P Kondratov

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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