Changes in the quality of cow’s milk depending on genotypic factors

In the market economy, quality of any product is one of the most important factors in improving people's living standards, as well as economic, social and environmental safety. It is well-known that the composition of milk and its nutritional value vary depending on various factors: both paratypical (animal health, feeding conditions, maintenance, lactation period, etc.) and genotic. The study of the influence of genotypic factors on the quality of cow's milk makes it possible to maximize the productive potential of cattle, receiving high-quality products from them and consolidating necessary indicators in the offspring. Having conducted a study on the influence of heredity and breed affiliation of cows on the quality of raw milk produced by them, we have proved scientifically that the two studied lines - "Vis Back Ideal" and "Reflection Sovering" - have a fairly high impact on dairy productivity of cows. Milk parameters such as protein and somatic cell content were approximately the same in both groups. The obtained patterns can be explained by the fact that both groups consist of black-and-white Holstein cows with a Holstein blood content of 95.5-95.6%. However, the cows of group 2 outperformed their peers from group 1 in terms of milk yield and fat content. According to the conducted scientific research, it is economically advantageous for the farm to purchase the seed of bulls produced by the Reflection Sovering line for highly productive offspring - milk from offspring is obtained with higher fat content and higher protein content (by 0.4-0.5% and 0.2-0.3%, respectively, more than the other line used).