TY JOUR TI GENETIC RESOURCE CHARACTERISTICS IN THE POPULATION OF DAIRY CATTLE IN OMSK REGION KW line KW genealogical structure KW siring bulls KW milk yield KW fat KW protein KW productivity JO Bulletin of KSAU AU Trotsenko, I.V. AU Ivanova, I.P. PY 2025 IS 0 PB Krasnoyarsk State Agrarian University