TY JOUR TI MONITORING VARIABILITY OF LEPTIN GENE (LEP) ALLELES OF LARGE CATTLE, DEPENDING ON THE DIRECTION OF PRODUCTIVITY KW leptin KW allele KW genotype KW polymorphism KW RFLP - Restriction Fragment Length Polymorphism KW productivity KW selection KW cattle. JO Vestnik of Kazan State Agrarian University AU Safina, N.Y. PY 2018 IS 12 PB Kazan state agrarian University