Use Holstein of breed at perfection Bestyzhevskoi of cattle

Before us there was a problem (task) to define (determine) optimum genotype animals on improving breed in conditions breeding factory "Volga" of area Tsilninskogo. By researches it has been established, that optimum кровность animals by five criteria (a yield of milk, fat content of milk, factor of reproductive ability, an index of fruitfulness and productive longevity) for the given herd is within the limits of 50-74 % on is red motley holstein to breed.