Fig. 1. SREG₂ and SREG_M+1 biplots for the 1998 Ontario winter wheat performance trial data. The numbers are different cultivars; the sites are EA = Elora, HN = Harriston, ID = Inwood, NN = Nairn, OA = Ottawa, RN = Ridgetown, WE = Woodslee, WK = Woodstock.