THE EFFECT OF COWS GENOTYPE ON THEIR PRODUCTIVITY AND MILK QUALITY

As studies by Russian and foreign scientists show, the breed and the cows genotype affects on their productivity and milk quality. In connection with this, the purpose of this research was to study the milk productivity and milk quality of the Tatarstan type Kholmogory cows with different complex genotypes on the milk protein genes, namely, alpha S1-casein, beta-casein, kappa-casein, beta-lactoglobulin, alpha-lactalbumin. The genotypes on the milk protein genes were determined by DNA analysis methods. Determination of quantitative and qualitative indicators of milk was carried out by control milking and on a milk analyzer «LAKTAN1–4». Better raw milk, that is, with the greatest amount of nutrients, such as milk fat and protein, was milk from cows with complex genotypes of milk proteins ВВ/АВ/АВ/АВ/АА, ВВ/АВ/АВ/АВ/АВ, ВВ/АВ/АВ/АВ/ВВ. In practical terms, it is possible to get more quality dairy products from such raw materials.