Effect of gamma radiation on growth of explants of banana cv Grand Naine

In the present study survival percentage and regeneration of in vitro shoot tip cultures of banana showed the inverse relation with irradiation doses. Days required for greening were required comparatively more in higher doses of irradiations ie 60 Gy (12.2 days). In case of shoot and root characters significantly maximum number of shoots per explant (3.90), number of leaves per shoot (4.60), average shoot length (5.65 cm), minimum number of days (10.24 days) for first leaf emergence, maximum per cent rooting (100), length of primary roots (6.2 cm), number of roots per shoot (8.1) and minimum days for first root initiation (3.10 days) were recorded in control over rest of the treatments.