Milk productivity in Holstein cows of different lines

The article examines the milk productivity of Holstein cows of different lines. The indicators of dairy productivity of cows belonging to the lines Reflection Sovering 198998, Montwick Chieftain 95679, Vis Back Idial 1013415 and Pabst Governer 889233 were studied. The Governor 889233. As a result of our research, it was found that cows belonging to the line Reflection Sovering 198998 had the highest indicators for milk yield for the 3rd lactation, for the production of milk fat and milk protein. In terms of fat content, there was no significant difference in cows of different lines. The highest content of the mass fraction of protein was in cows of the Montwick Chieftain line 95679, which should be taken into account during further reproduction.