Determination of hybrid force, gene function and inheritance in the wheat of the news Triticum aestivum L.

Five varaieties of bread wheat (Triticum aestivum L.) along withtheir (1 0) hybrids from on half diallel crosses were used to estimateheterosis, gene action and heritability and avarage degree of dominancefor plant height, number of tillers, number of spikes per plant spikelength, number of grains per spikes, 100 grains weight and grain yield perplant.Desirable and significant heterosis was obsarved for some hybrid .The additive, dominance and environmental variance significant for allcharacters.There were over dominance for number of tillers per plant,number of spikes per plant spike length, number of grains per spikes, andgrain yield per plant, however, partial dominance for plant height and 100grains weight .The broad sense heritability were high for all charactersexcept for grain yield per plant were medium . However ,the narrowsense heritability were medium for plant height , spike length, grain yieldper plant and low for number of tillers per plant, number of spikes perplant, number of grains per spikes, and 100 grains weight .