The composition and properties of the milk of black-and-white cows of different genotypes

Abstract

Relevance. The paper presents data on the relationship between the linear affiliation of black-and-white cows and their milk productivity, chemical composition and technological properties of milk.Results. According to the results of the conducted studies, it was found that for the first lactation, the descendants of the Montvik Chieftain line (8272.0–95679 kg) were the best in terms of milk productivity, which is 3.3–4.8% more than those of their peers from other lines. The highest fat content in milk was observed in the first heifers of the Annas Adema 30587 line, which differed in lower milk yield, but high fat content in milk. The fat content of milk was 4.99% and was higher than in the milk of cows of other lines by 0.61–0.96%. Among fullaged animals, the greatest milk productivity was observed in the descendants of the Montwick Chieftain 95679 line. In terms of the content of dry matter and fat in milk, cows of the Annas Adema 30587 line outperformed animals of other lines by 0.39–0.51% and 0.42–0.55% respectively. Milk of cows of the Pabst Governor 882933 line contained 0.05–0.08% more protein than milk of other groups.