TY JOUR TI INFLUENCE OF ROMANOV SHEEP GENOTYPE ON THYROXINE CONTENT IN THE BLOOD SERUM OF DESCENDANTS KW breeding sheep KW genotype KW thyroxine KW hormones KW Romanov breed KW descendants JO SCIENTIFIC NOTES KAZAN BAUMAN ACADEMY OF VETERINARY MEDICINE AU Tarasenko, E.I. AU Korotkevich, O.S. AU Petuhov, V.L. PY 2026 IS 262 PB Kazan state agrarian University