Nardid A., Ivanova N., Kutrovsky V.

Characteristics and genetic conditionality of main economic-useful signs of Holsteinized cows of black-motley breed

Use of genotype of Holstein breed at perfection of domestic black-motley cows allows to receive high milk yields at level of 7000 and more kg for a lactation and to raise qualitative structure of milk considerably. Causes of cowsТ leaving at fastened stall-pascual maintenance are revealed. Influence of genotype of parents on safety and fertilizing capacity of brood livestock is shown.

Keywords: COWS, MILK YIELD, FAT, PROTEIN, MILK, LACTATION, IMPROVING HOLSTEIN BREED of COWS, BULLS, GENOTYPES, SAFETY and FERTILIZING CAPACITY, CAUSES of COWSТ LEAVING, BLOOD BIOCHEMISTRY