TY JOUR TI CHARACTERISTICS OF FROZEN-THAWED SEMEN FROM BREEDING BULL OF DAIRY AND COMBINED BREEDS KW stud bulls KW bull semen quality KW spermatozoa KW DNA fragmentation KW assisted reproductive technologies JO Bulletin of KSAU AU Ushakova, S.N. AU Iolchiev, B.S. AU Mashtaler, D.V. AU Pridanova, I.E. AU Moroz, T.A. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University