The objective of this study was-to evaluate the adaptability and stability of corn cultivars used methodology of CRUZ et al. (1989). Early and normal cultivars were evaluated in two experiments conducted in three agricultural years a in Capinopólis-MG in four disting sowing times. The experimental design was a completely randomized block with three replications, the plots were constituted of four rows of five meters of length, spaced 0.9m. Yield grain data were obtained and utilized the methodology of Cruz for estimated the parameters of adaptability and stability of corn cultivars. The ideal cultivar extolled for Cruz, high mean, <IMG SRC=" /img/fbpe/cr/v33n2/15205x07.gif">and variance of the regression deviations near or equal to zero, were not found between tested materials. Also, material less exacting in unfavorable environment was not found. In general, the material that more detached was the hybrid G 551, with high mean, good responses to improved environment and stability. The variety BR 106 presented performance equal and even superior to some hybrids.
Zea mays; cultivars; genotype x environment interaction
