TY JOUR TI CHANGE IN THE VITREUOSNESS GRAIN OF DURUM WHEAT IN THE BREEDING PROCESS IN THE MIDDLE VOLGA REGION KW durum wheat KW cultivar KW grain vitreousness KW stability KW productivity KW grain quality JO Vestnik of Kazan State Agrarian University AU Malchikov, P.N. AU Myasnikova, M.G. AU Chaheeva, T.V. PY 2022 IS 16 PB Kazan state agrarian University