Principal component analysis of the nine soybean genotypes. The two principal components accounted for 27.5% (PCA1) and 16.6% (PCA2) of the total variation. Ellipses in color represent the genotypes and the color of the arrows indicates the contribution of each trait: a color gradient was used from red (high contribution) to blue (low contribution). Additional variables that were not considered to create the PCA were colored in blue.