To study effect of water deficit on morphological traits and average heterosis, three maize hybrids and their parental lines were evaluated under normal irrigation and water deficit after pollination using randomized complete block design with four replications at Agricultural and Natural Resources Research Center of Moghan during 2008. Combined analysis of variance revealed significant differences among genotypes for all the studied traits. However, genotype and irrigation interaction was not significant for most of the traits. The highest amount of heterosis for grain yield and yield components in both conditions was observed for single cross 704 (SC704) derived from a cross between MO17 and B73 inberd lines. The results show SC704 could be suitable hybrid for Moghan region as well as limited irrigation condition.
