TY JOUR TI INDEX ASSESSMENT OF GENOTYPED AYRSHIRE COWS FROM DIFFERENT REGIONS OF THE RUSSIAN FEDERATION KW milk yield KW index selection KW Ayrshire breed KW sire KW BLUP AM JO Bulletin of KSAU AU Tulinova, O.V. AU Romanova, E.A. AU Vasileva, O.K. AU Sermyagin, A.A. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University