Quantitative and qualitative crop increase is one of the most important basic and fundamental objectives in plant breeding. Generally used techniques of mutation and irradiation is gamma ray. A research was performed in the experimental field of yasouj Islamic Azad University, in 2008, in collaboration with the Atomic Energy Organization of Iran and the nuclear medicine department of Shiraz Namazi Hospital was performed. Due to low permeability and lack of ability to produce doses of high radiation X, the gamma-ray from cobalt 60 at doses (zero as a witness, 3, 6, 9, 12, 15, 18 and 21 Gy) was used to identify the intensity of radiation desired for understanding the changes desired phenotypic, morphological and physiological Pinto bean seeds on Khomein cultivar relative humidity from12 to14 percent were used which in this experiment a part of this research will be discussed. The results showed that exposure on the number per pod, seed number and economic yield in the 1 percent level of significance. The highest pod production with 326.3 number/m2 to 3 Gy dose and the lowest pod production with 108.3 number/m2 to 21 Gy dose of radiation intensity. The highest seed production related to the dose of 3 Gy with 1565 seeds /m2 and the lowest grain yield with 520.8 seeds/ m2 to 21 Gy dose was observed. The most economical yield was with 570.8 gr seed /m2 to the lowest dose of 3 Gy and economic performance was with 204.5 g seed/m2 to 21 Gy dose respectively.
