Twenty-eight hybrids produced from a diallel cross involving 8 genotypes were evaluated for yield and several related traits over 2 seasons. Data were analysed for genetic divergence (based on Mahalanobis' D2 statistic) and combining ability. Hybrids and parents were grouped into 9 and 10 clusters following summer and winter evaluation, respectively. Clustering was influenced mainly by the parents as well as inconsistency between the 2 seasons.