Regression coefficients were not significant in any genotype, except for G17, G22 and UFUS Riqueza genotypes.
G22 and UFUS Riqueza genotypes showed significant regression coefficients, but with values that were statistically higher than one ([beta]1i> 1).
In turn, the genotypes G1, G4, G11, G16, G18, G21, G22, G24, G25 (UFUS Guarani) and G26 (UFUS Riqueza) showed low stability and were considered the main contributors to the interaction G x E.
In the case of the group of genotypes that showed low stability, the G11 and UFUS Riqueza had the highest averages of grain yield, 2525.40 and 2578.40 kg [ha.sup.-1], respectively higher than the overall average (considering all experiments).