TY JOUR TI THE ROLE OF KAPPA-CASEIN (CSN3), BETA-CASEIN (CSN2), BETA-LACTOGLOBULIN (BLG) AND ALPHA-LACTALBUMIN (LALBA) GENES IN THE FORMATION OF MILK PRODUCTIVITY OF BLACK-AND-WHITE COWS KW polymorphism KW milk protein KW beta-casein (CSN2) KW kappa-casein (CSN3) KW alpha-lactalbumin (LALBA) KW beta-lactoglobulin (BLG) KW black-and-white cattle KW productivity JO SCIENTIFIC NOTES KAZAN BAUMAN ACADEMY OF VETERINARY MEDICINE AU Paramonova, M.A. AU Valitov, F.R. PY 2025 IS 262 PB Kazan state agrarian University