TY JOUR TI THE GENOMIC MUTATION CONNECTION WITH THE REPRODUCTIVE ABILITY OF BULLS SPERM-DONORS KW bull-breeder KW sperm KW bull age KW polyploidy KW aneuploidy KW structural abnormalities JO Bulletin of KSAU AU Chetvertakova, E.V. PY 2014 IS PB Krasnoyarsk State Agrarian University