TY JOUR TI POLYMORPHISM OF SOMATROPIN CASCADE GENES IN JERSEY COWS KW cows KW Jersey breed KW polymorphism KW somatotropin KW prolactin KW PIT1 KW genetic markers KW breeding JO Agrobiotechnologies and digital farming AU Zarubezhnova, D.V. AU Shaydullin, R.R. AU Ahmetov, T.M. AU Zinnatov, F.F. AU Tyulkin, S.V. PY 2025 IS 4 PB Kazan state agrarian University