1)    Genotypes, parents and the resultant fifteen crosses mean squares were found to be highly significant for all traits studied in F₁ and F₂ generation in the two experiments. 2)    Parent vs. crosses mean squares as an indication to average heterosis over all crosses were found to be highly significant for all traits studied expect for the number of spikes per plant under infected and number of spikes per plant and number of spikelets per main spike under normal conditions in both the F₁ and F₂ generation, respectively. 3)    Means value were less under infected than under normal condition in both generations studied for grain yield per main spike, number of grains per spike, grain yield per spike, 1000-grain weight and grain yield per plant. 4)    Variance of general combining ability was found to be highly significant for all traits studied except, number of spikes per plant for F₁ generation under both experiments. While, it was not significant under normal condition in F₂ generation. 5)    The GCA/SCA ratio was higher in F₂ generation than F₁ hybrids for all studied traits revealed that additive and additive × additive types of gene action were increase and the non-additive genetic variance were decrease in F₂ generation. 6)    The parental variety Shandaweel-1 proved to be good general combiner in number of grains per main spike, grain yield per main spike, number of grains per spike, grain yield per spike and grain yield per plant for F₁ hybrid and F₂ generation. Also, Giza-171 was good general combiner in heading date, grain yield per main spike and number of grains per spike for F₁hybrid, in addition to, number of spikelets per main spike, 1000-grain weight and grain yield per plant for F₂ generation under infected with leaf rust. 7)    The most desirable SCA effects for grain yield per plant were detected by the seven hybrids i.e. Shandaweel-1 × Giza-171, Shandaweel-1 × Misr-3, Giza-171× Misr-3,  Misr-3 × Sakha-95, Sakha-95  × Sids-1, Sakha-95  × Morocco and  Sids-1 × Morocco. 8)    Desirable and significant useful heterosis for grain yield per plant was detected in all 15 F₁'s under both experiments, where ranged from 10.56% to 48.30% and 4.81% to 52.35% in normal and infected with leaf rust, respectively. In F₂ generation, decreased heterosis values for most hybrids indication of occurrence segregations.