GENETIC STUDIES ON SOME ECONOMIC CHARACTERS IN DIALLEL CROSSES OF CUCUMBER (Cucumis sativus, L.).

Four cucumber strains and their six possible F1' hybrids were used to study the GCA, and SCA and to illustrate their relations to the type of gene action for six traits (Total yield/ plant, early yield / plant, Number of fruits/ plant, average fruit weight, fruit shape and powdery mildew resistance). The results showed that GCA and SCA contribute significant role for controlling total yield/plant, number of fruits/plant, average fruit weight and shape index Meanwhile, for early yield trait, SCA appeared to have no significant role on controlling this character. Results of resistance to powdery mildew for the 10 studied genotypes did not differ significantly. The strain 106 could be used as a good combinor for the studied characters except for the average fruit weight, where the strain 104 showed superiority for GCA.