Different doses of Gamma ray (0 Gy to 700 Gy), with increment of 100 Gy, were used to create variation of sorghum variety (yezin-7). Mean values, genetic variability and heritability induced by Gamma ray were investigated for twelve agronomic traits viz., plant height, stem width, leaves per plant, stalk weight, juice volume, Brix %, panicle length, panicle width, primary branches per panicle, 100 seed weight, seeds per plant and grain yield per plant. Mean values in traits showed both positive and negative increases. The highest positive mean values were noticed at 300 Gy-treatment for most agronomic traits (stem width, leaves per plant, stalk weight, panicle width, 100 seed weight, seeds per plant and grain yield per plant). High Genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were observed for stem width, seeds per plant and grain yield per plant. High heritability (h2) accompanied with high genetic advance as percentage of mean (GAM) were recorded for plant height, stem width, seeds per plant and grain yield per plant. As considering high genetic parameters, treatments with 400 Gy and 300 Gy induced the highest variability for most of the studied traits such as plant height, leaves per plant, stalk weight, primary branches per panicle and stem width, panicle length, respectively. For seeds per plant and grain yield per plant, 400 Gy-treatment showed the highest GCV and PCV while the highest h2 with high GAM were recorded at 300 Gy-treatment