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A complete diallel cross, including reciprocals, was made between 10 maize inberd lines. A simple lattice design was used. Diallel analysis was conducted using the mixed B model of method 1 of Griffing for the characters which had significant F-values in ANDV A. The results of the analysis showed that GCA for plant height, ear height, days to silking, days to tasseling, kernel
lenght, yield per plant, and stomata number were significant at 1 % probability level and for row number per ear at 5% probability level. SCA effects were significant for all characters. Additive genetic variance was found as the main
source of variation for days to silking, days to tasseling, kernel length and stomata number. For the rest of the characters, non additive genetic variation had the greatest portion of variation. Reciprocal effects were significant for all
characters which can be an indication for the existance of cytoplasmic effects in the experimental materials.