Sorghum (Sorghum bicolor(L.) Moench) has a mighty adaptation possibility, which are important parameters of genotypes growing in severe conditions. This study focused on the differential responses of six genotypes under two levels of water deficit (20 and 40% decrease in water rate) compared with normal conditions during two seasons. Variance components and tolerance indices under different environments provide new chances for breeders to select genotypes, which have high yielding and are stress tolerant. The results showed the superiority in theperformance of Shandawil variety under normal conditions, while Line 3 showed a marked superiority under high drought stress compared to other genotypes. The results of the variance components of most studied traits showed that the major contribution in phenotypic performance is due to the genetic variation.  According to heritability in broad sense, the values ranged from 27.82 to 99.12%. With regard to the genetic advances, the results showed a clear discrepancy among the studied traits, as the characteristics of the plant height, fresh weight and grain yield of the plant recorded the highest genetic advance, while chlorophyll content recorded the lowest genetic advance of the plants.