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Abstract
Six parental genotypes of eggplant (Solanum melogena L.), i.e, Balady Long Purple, Black Beauty, Balady Long White, Belleza Nera, Violetta Lunga and Baker were used in making non-reciprocal diallel pattern of crosses. The results indicated the involvement of both additive and non-additive types of gene action in the inheritance of all studied characters. The GCA/SCA ratio indicated that the non-additive type of gene action was more important in the inheritance of early yield/plant and total yield/plant, while the additive type was more important in all other characters. The results indicated the presence of partial dominance in the inheritance of plant height, number of days to first flower bud anthesis, fruit diameter and fruit weight, and over dominance in the inheritance of number of fruits/plant. The direction of dominance was toward the parents with higher expression of these characters except fruit diameter and weight the direction was toward the parents with lower expression . The six parents used in the present study had more dominant than recessive alleles concerning plant height, number of days to first flower bud anthesis, fruit diameter, fruit weight, and number of fruits per plant. The narrow sense heritability of plant height, number of days to first flower bud anthesis, fruit diameter and fruit weight was high, and it was above intermediate for fruit length and early yield per plant and was intermediate concerning number of branches/plant, number of fruits /plant and fruit total sugars content, while it was low for total yield/plant and fruit fibers content, and was very low for fruit reducing sugars content.