تعیین دز مناسب پرتوهای گاما برای ایجاد موتاسیون در ریزنمونه های موز

Banana belongs to Musaceae family and Musa genus, categorized as a plant growing in tropical and subtropical regions. In recent years, many attempts have been made for extending the cultivation of this plant in Iran. The cultivars, which are cultivating commonly in Iran are mostly Cavendish and Grand Nain, having rather long heights (۲-۴ meters). This research has been carried out aiming at determining the optimum dose rate to induce mutation in the banana plant shoot-tips. For this purpose the plant shoot-tips were exposed to various doses of gamma radiation with eight treatments of ۰, ۱۰, ۱۵, ۲۰, ۲۵, ۳۵, ۴۵ and ۶۰ Gray. The project was directed in a completely randomized design. After the treatment, various traits such as: number of alive plants, number of leafs, plant height and wet weight have been measured. For the data analysis, SAS and MSTAT softwares have been used in order to evaluate the average values and variances of the output results for the further analysis and comparisons. The results indicate that the dose rates of ۲۵ to ۴۰ Gray are the optimum rate values for induction of the mutation in this plant. Also, the propit analysis shows that the dose rate of ۳۹.۸ Gray is at the point of LD۵۰ (۵۰% of the dead level).

کلیدواژه ها:

موز ، نوک ساقه ، موتاسیون ، پرتو گاما ، دز مناسب