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Drought stress is a major production constraint of maize (Zea mays L.) in the lowland tropics. A study was conducted.to determine the yield potential and stability of five maize hybrids, three improved composites, and one local maize variety in favourable and drought-stressed maize production· environments in Ghana. The nine genotypes were evaluated at a total of 20 sites in the major agro-ecologicalzones of Ghana from 1995 to 1997. The 20 sites were divided into two environments (stress and non-stress) of 10 sites each, based on rainfall data during the growing season. Effects due to genotype (0" location (L), and G x L interactionwere highly significant (P |
