TY JOUR TI DAIRY EFFICIENCY AND GENE POLYMORPHIC VARIANTS OF KAPPA-CASEIN, BETA-LACTOGLOBULIN OF HOLSTEINED BLACK-MOTLEY CATTLE OF SAMARA TYPE KW genotype KW milk KW productivity KW polymorphism KW gene KW Kappa-casein KW beta-lactoglobulin JO Bulletin Samara State Agricultural Academy AU Grashin, V.A. AU Grashin, A.A. PY 2016 IS 1 PB Samara State Agrarian University