Fig. 2.

Principal component analysis. (A) and (B) are the same figure but colored differently in order to highlight different aspects of the plot. (A) Principal component 1 (PC1) separates samples based on generation. Parental samples cluster on the right, while hybrids cluster on the left, closer to the common reference parent, Morex. (B) PC2 separates samples based on accession. The hybrids highlighted in (A) are colored in (B) to show which paternal parent they correspond to since Morex is the common maternal parent for all hybrids. (C) PC4 separates samples according to treatment. The proportions of variance explained by each PC are indicated on the axis labels.