Main economic traits of cows of the factory lines Bukem 66636657 and Blitz 17013604 of the Holstein breed of dairy cattle of domestic selection

The Holstein breed of dairy cattle is the most widespread due to its high productivity (7000–11000 kg milk with 3.6–3.8 % fat and 3.0–3.2 protein), good adaptability a variety climatic, feed technological conditions, as well conversion ratio. In this regard, breeding animals breed, including pedigree creation optimal conditions for directional rearing young animals, great importance economy Republic Belarus. Any characterized by distinctive quality, certain structure, specific morphological economically useful traits. goal our work was analyze main traits two new factory lines Bukem 66636657 Blitz 17013604 domestic selection. To achieve goal, we used UE “GIVC Minselhozproda” information database bred at basic farms. It has been established that cows are rates, reproductive performance sufficient development regardless line. effective use will increase genetic potential herds, allowing obtaining high-value origin.