TY JOUR TI Estimation of efficiency of recurrent selection on the field artificial infectious background in creating of red clover breeding material resistant to root rots KW red clover KW hybrid population KW infection background KW recurrent selection KW winter hardiness KW forage productivity KW seed yield KW root rot resistance JO Adaptive Fodder Production AU Arzamasova, E.G. AU Griping, M.N. AU Popova, E.E. PY 2019 IS 2019 PB Federal Williams Research Center of Forage Production and Agroecology