GENEALOGICAL STRUCTURE AND PEDIGREE QUALITIES FORMING IN BULLS OF TATARSTAN TYPE OF CATTLE
Genealogical structure according to male lines and female families of new Tarstan type of cattle was studied. Two related groups, based on blood bulls Yar 21, Lifter 149, including 15 sons and grandsons with genetic potential of 7175 kg of milk with 3,81% fat content. Pedigree value of Tatarstan bulls lower to some extent than in motley-black and Golshtint bulls and TRI constitutes makes +381.However, their advantage is the fact that they are the improvers of all three signs of milk productivity: yield, milk fat and proteins. In the stock - breeding farm named after Lenin seven female families of 53 cows and productivity of 5891 kg of milk with 3, 83% of fat were selected. In order to improve Tatrstan type to the highest level of selection there is a necessity to form genealogical structure, consisting of not less than 5-6 lines and 12-15 families.