TY JOUR TI effect of k -casein genotypes on milk yield in second-generation dairy cattle KW cattle KW Kholmogorskaya breed KW kappa-casein KW k-casein KW genotype KW gene KW dairy productivity KW polymorphism JO Dairy industry AU Khudyakova, N.A. AU Kudrina, M.A. AU Klassen, I.A. PY 2024 IS 0 PB Kemerovo State University