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Heatmaps of the genetic correlations (rg) between pairs of environments estimated from variance–covariance of the FA2 model (lower triangle) and number of varieties in common between a pair of environments (upper triangle) for a GY b TGW c SCG d HW. Colours for the lower triangle range from dark blue for high positive rg to dark red for strong negative rg. High rg means low GEI
