Peanut (Arachis hypogaea L.) is an autogamous, annual plant, a good source of vitamins and fats, mainly grown for oilseed, reproduces by self-fertilization, which makes it susceptible to several biotic and abiotic stresses due to the low genetic variability. In this sense, induced mutagenesis is an effective approach to create new resistant cultivars with desirable morphological characteristics by inducing heritable mutations in the plant genome that affect plant physiology, morphology, and photosynthesis. The objective of this study is to evaluate the morphological and physiological development of two peanut varieties irradiated with three different doses of gamma rays (100 Gy, 150 Gy, 200 Gy) compared to the control (0 Gy). Morphometric characterization of descriptive data included, number of days to 80% flowering, germination rate, plant height, stem diameter, number of leaves/plant, number of flowers, stem length and width, stem length and width, length and width of leaflets, the number of branches/plant and the observation of diseases (Chlorosis, Sigatoka and dwarfism). The qualitative and quantitative data obtained were analyzed using SPSS 26.0. The results showed that the doses of gamma irradiation used significantly affected the appearance of flowers; on the other hand, they did not have a significant effect on the rate of germination. Quantitative data showed that gamma ray treatment did not significantly affect leaf number, leaflet length and width, stem diameter and stem length for flower 11. On the other hand, there is a significant difference in plant height and number of branches per plant between control and doses for KP29 compared to other parameters. Irradiation also caused changes in number and color of flowers. The qualitative data showed that the percentage of yellowing and Sigatoka diseases was very low compared to the dwarfing disease for the two varieties.