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Abstract
This study was conducted to determine the proper dose of gamma irradiation for the mutation breeding program of eggplant (Solanum melongena L.). To serve the purpose, seeds of BR-12 and BR-16 eggplant genotypes were subjected to different doses of gamma rays (0, 80, 120, 160 and 180 Gy) with Cobalt 60 (Co-60) by irradiation and some characteristics of M1 plants, germination rate (%), shoot length (cm), hypocotyls length (cm), plant fresh weight (gr/plant), plant dry weight, shoot fresh weight (mg/plant), shoot dry weight (mg/plant) and leaf width (cm) and leaf length (cm), were studied. The experimental results revealed that doses of gamma rays used to develop new generation and create variation were varied in accordance with genotypes and different doses lead to significant reductions in the inspected characters of two eggplant genotypes. Applicable appropriate dose without any reduction, for BR-12 genotype was determined as 160gy, no sufficient reduction was observed for effective dose for BR-16 genotype.