Fig. 4
From: Genome-wide association study of four yield-related traits at the R6 stage in soybean
Population structure analysis of 133 soybean landraces. a The mean LnP(k) and Delta k values when k ranges from 1 to 6. b Two-dimensional scatter plot of PCA, the green dot represents subgroup 1 and the red dot represents subgroup 2. c Population structure of 133 soybean landraces, there are two colored segments and each segment represents the percentage of the individual in the population. d A neighbor-joining tree of the 133 soybean landraces that can be divided into two subgroups