A total of 722 geographically different soybean landraces were obtained from the germplasm bank of Advanced Radiation Research Institute (ARTI), Jeongeup, South Korea.Six phenotypic characters, namely location (place of origin), days to 50% flowering, maturity date, 100-seed weight, seed coat color, and flower color were recorded for a period of 3 years from 2005 to 2008 at the research field in Jeongeup,South Korea and the average mean value was used in this study (Supplementary Table 1).