Four genotypes of bread wheat were used to study the quantitative traits (grain yield per plant, No. of spikes per plant, No. of grains per spike, weight of 1000 grains, harvest index and biology yield) and growth traits (plant height, flag leaf area, and No. of tillers per plant).The study included estimation of genetic and phenotypic correlation coefficients between grain yield and its components and some growth traits. The results gave a positive and high genetic correlation for grain yield with harvest index, No. of grains per spike, weight of No. 1000 grains, No. of tillers and plant height, while analysis of the phenotypic correlation coefficient gave a high and positive significant correlation between grain yield and the harvest index and the weight of 1000 grains and the No. of tillers. Path coefficient analysis showed that there are direct, high and positive effects of harvest index and biological yield on grain yield. The estimates of heritability showed that the traits, No. of grains per spike, grain yield, No. of tillers, flag leaf area, weight of 1000 grains, and plant height, were highly heritability. Through these results, it became clear that the trait of harvest index can be used as an selection index in bread wheat improvement programs.