Evaluation of Genetic Variation Induced by Gamma Ray Irradiation in Morphological Traits in M2 Mutant Lines of Canola

Mutation induction is considered as an effective way to enrich plant genetic variation, particularly for traits with a very low level of genetic variation. The objectives of this study were to evaluate the effect of 1200 GY gamma ray irradiation on morphophenological traits, yield and yield components and to identify useful mutants in two spring rapeseed "RGS003" and" Sarigol" cultivars. The results revealed that there are highly significant difference sa mong mutant lines. Based on the results of phenotypic and genetic correlations, 1000 seed weight had the highest relationship with see dyieldper plant. Stepwise regression analysis also showed that 1000 seed weight was one of the most important traits contributing in seed yield.In viewpoint of the exploitation of the induced variation at morphological traits, M2 lines 9 from RGS003 and 16, 25 and 26 from Sarigol could be suggested as the most desirable lines for canola breeding