An experiment was conducted at the Experimental Farm, Faculty of Agriculture, Zagazig University, Egypt during the three successive winter seasons 2014/2015, 2015/2016 and 2016/2017 for assessment some genetic parameters for days to heading, flag leaf chlorophyll content, flag leaf area as well as grain yield/plant and its components. Eight bread wheat genotypes (Line 1, Line 2, Line 3, Line 4, Line 5, Line 6, Giza 168 and Sakha 93); each was crossed back to two testers, high performing (Misr 1) and low performing parent (Gemmeiza 10). The objective was to determine additive, dominance and epistasis gene action, heritability, prediction and genetic correlation. Mean squares due to all genotypes (L 1i, L 2i and P i ) as well as test crosses (L 1i and L 2i ) were highly significant for the studied characters. The three types of additive, dominance and epistasis gene effects were highly significant for all studied characters. The magnitude of additive genetic variance was larger than the corresponding dominance ones in the inheritance of days to heading, flag leaf chlorophyll content, flag leaf area, number of spikes/plant, number of grains/spike and 1000-grain weight. But, the dominance genetic variance was of great importance in the inheritance of grain yield/plant. The F values indicated that dominance was ambidirectional for all studied characters. High heritability in narrow sense was found for days to heading, flag leaf chlorophyll content, flag leaf area, number of spikes/plant, number of grains/spike, 1000-grain weight. Whereas, moderate heritability was registered for grain yield/plant. Results indicated that it could be feasible to be predict as early as possible for transgressive segregants which out-perform parental range for number of spikes/plant (49.60%) followed by grain/yield plant (46.01%), days to heading (44.43%) and flag leaf area (40.90%). Genetic correlation provided evidence for positive and significant correlation between grain yield/plant and each of number of grains/spike and 1000-grain weight at additive genetic level, as well as number of spikes/plant and number of grains/spike at epistasis genetic level. However, at dominance genetic level insignificant correlation was exhibited between grain yield/plant and all studied characters.