Stability analysis of kernel yield and its components in maize (Zea mays L.) in winter and monsoon seasons

Twenty eight single cross hybrids of maize were evaluated over eight environments for grain yield and its components and harvest index. Significant genotype x environment interaction was observed for all the traits during winter and monsoon seasons, except for ear girth (both the seasons) and No. of ears/plant (monsoon season). These hybrids performed well for grain yield in both winter and monsoon seasons and were also stable for ear length, but in general, were unstable for 1000-kernel weight in both the seasons. The inbred line J-617-61-1-1-1-1 in hybrid combination performed well in both seasons. The deviation from regression (5 a) appeared to be a more important parameter than regression () for measuring stability.