Mashark S. Abdulai, Savanna Agricultural Research Inst., Savanna Agricultural Research Inst., PO Box 52, Tamale, Ghana
The objectives of the study were to evaluate maize genotypes for drought tolerance and make appropriate recommendations on the locations of adaptation. Eight genotypes were evaluated for four years at three planting dates. The first planting for each year was in mid June (normal planting time), the second planting was in Mid-July while the third planning was in Mid-August. The correlation coefficient (-0.6930) between grain weight and drought rating was highly significant (p<0.01). This indicated that as drought tolerance in increased, the grain yield also increased. The most tolerant genotypes had ratings of either 2 or 3 and produced more grain than the less tolerant ones with drought rating of 4 or 5. The AMMI model was used to identify drought tolerant varieties for growing in specific environments. Year and time of sowing were very important to grain produced.
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