4. Discussion
The level of drought stress imposed on the trials in the two
seasons was monitored in order to ensure that it was sufficient
enough to elicit differential reactions of hybrids to the treatment. The average grain yield for experimental hybrids under
drought in this study was 23% of that under well-watered
conditions. This is within the range of 20e30% suggested as
severe drought stress [3]. The non-existence of significant
hybrid year interaction effects, suggesting that hybrids had
consistent performance over the two years, was consistent with
the result of other authors [4]. Since hybrids were consistent in
their performance over years, superior genotypes wit