Effect of Gamma Irradiation on Shelf-Life and Quality of Musa paradisiaca and Musa acuminata Locally grown in Benue State Nigeria
Keywords:
Banana, Dose, Irradiation, Proximate, Shelf lifeAbstract
Banana (Musa Spp.) is a unique fruit due to its high calories and nutritive value. Being a good source of carbohydrate, minerals and vitamins, it leads all other fruits in food value. However, banana is being fragile, perishable fruit and cannot be preserved for longer time after harvesting. As a result, significant portion of the fruits harvested are lost every year due to shorter postharvest life. This research investigated the effect of Co-60 gamma irradiation on shelf life and Quality of two banana species (Musa paradisiacal and Musa accuminata AAA group ) locally grown in Benue State, Nigeria. Banana fruits were irradiated at doses of 100Gy, 200Gy and 300Gy and stored at room temperature for shelf-life study. Proximate analysis was done when the fruits have fully ripened. For plantain, 100Gy dose extended the shelf life by 2-days, 200Gy extended the shelf life by 5-days while 300Gy dose extended the shelf life by 7-days. For Cavendish banana, 100Gy extended the shelf life by 3-days, 200Gy dose extended the shelf life by 5-days while 300Gy extended the shelf life by 6-days. Irradiated samples proximate composition was compared to the controls. For plantain, 100Gy dose had significant effect on Ash and pH composition, 200Gy had no significant effect on proximate composition while 300Gy dose affected the protein composition. For Cavendish banana, 100Gy dose impacted on Ash, Crude Fibre and Carbohydrates. 200Gy dose affected Ash and Crude Fibre while 300Gy dose showed no significant effect. Comparing the effect of irradiation on shelf life and proximate composition, the optimal dose of gamma irradiation for Plantain and Cavendish banana were found to be 200Gy and 300Gy respectively for shelf-life extension without statistically affecting the samples proximate composition.