eng Science and Education Publishing American Journal of Food Science and Technology 2013-10-17 1 1 36 41 10.12691/ajfst-1-3-5 AJFST2013135 article N. Hamideldin n.hamideldin@yahoo.com 1 O.S. Hussien 1 National Products Research Department, National Center for Radiation Research and Technology (NCRRT), Nasr City, Egypt Tuber of two varieties of potato named Silana and Daimont were irradiated with control, 10 and 30 Gy of gamma rays before planting to investigate its effects on morphological, physiological criteria and DNA profiles. The effects of γ-irradiation on stored tubers were also investigated. It was observed that irradiation treatments improved vegetative characters in Silana and most of the physical properties were increased in response to treatment with 10Gy. But, in Daimont variety, the physical properties were inconsistently affected. Total phenols showed insignificant changes in the two varieties as affected by gamma irradiation and storage. A higher level of Ca, Cl, Fe and Na were detected in Silana as compared with corresponding contents in Daimont variety. Gamma irradiation treatments induced changes in DNA profile within the two varieties used. http://pubs.sciepub.com/ajfst/1/3/5/ajfst-1-3-5.pdf potato Solanum tuberosum storage minerals phenols TSS DNA