Inheritance as A Base for Future Improvement of New Egyptian Bread Wheat Cultivars

The main goals of that recent study were estimating the nature of the characters inheritance for three common wheat crosses. Six-parameters model was followed to achieve mention objectives. The scaling test proved significant values for all studied characters, except for the number of spikes. plant . Additive and dominance effects controlled the number of spikes and grain yield. plant in cross I, along with, 100-grain weight in crosses I and II. The magnitude of heterosis was significant (P ≥0.01) for all characters of the three crosses, except for the number of grains. spike of cross I and III. Inbreeding had significantly affected 100grain weight in any of the crosses and grain yield. plant -1 in cross II. Over dominance toward the higher parent (P ≥0.01) had recorded for all wheat characters, except for the number of spikes. plant -1 of cross II. Meanwhile, the values of over-dominance were towards the lower parent in the latter character. Heritability estimates ranged between 54.59% for (number of spikes. plant) and 85.77% for (100-grain weight) in cross I and II respectively. Expected genetic advance from selecting the upper 5% were recorded high for cross I and III.