Evaluation of Agronomic Traits of Mutants Induced by Gamma Irradiation in PF and RGS003 Varieties of Rapeseed (Brassica napus L.)

In order to evaluate of the effects of induced mutation doses of gamma irradiation 500، 700 and 900 Gry، the M2 generation of two rapeseed varieties including RGS003 and PF، were studied along with control treatments in a randomized complete block design with three replications. Selected lines of third-generation of mutation (M3) were evaluated for plant height (cm)، number of pods per plant and seeds per pod، pod length (cm) and 1000 seed-weight (gr). Effect of gamma irradiation doses in most traits were significant for both varieties while، number of pods per plant showed the highest C. V. in PF and RGS003 at doses of 500 and 900 respectively. Results indicated that the traits highly affected from gamma radiation. The PF mutants had the highest C. V. for most traits، showing it is highly affected from gamma irradiation. Mean comparison of the traits showed that four lines of PF and one line of RGS003 indicated better than control plant height، number of pods per plant، seeds per pod and seed weight. Results demonstrated that gamma irradiation is suitable for producing desirable variation and can be used as suitable genetic resources for producing superior varieties.