Influence of Holstein blood relationships on productive performance of Yaroslavl’ cows

In the modern breeding development, crossing of domestic dairy breeds with the Holstein cattle has a significant impact on the productive performance of animals. With the Holstein blood relationship increase, there has been an increase in the milk yield of Yaroslavl’ cows in 2016-2020. The superiority of Holstinized animals having a high degree of blood relationship over purebred animals have reached up to 1446 kg of milk (6056 kg) in their 1st lactation in 2020. The fat content has an inverse dependence, that is, with Holstein blood relationship increase, the fat content decreases to 3.94% (-0.12%). With the Holstein blood relationship increase, the live weight of cows also increases, the difference being over 65 kg compared to purebred Yaroslavl’ animals, and amounting up to 555 kg. It is advisable to use absorption crossing in herds that have a full and balanced ration, which allows realizing the genetic potential of animal productivity.