Figure 1.

Principal component analysis 3D-plots of oat varieties and compounds. (A) Compound loading plot. Colors identify groups obtained from cluster analysis (Supplementary Figure S1); (B) Separation of oat varieties grown in sand and clay. Red dots are sand samples, green dots are clay samples; (C) The same as in (B), only slightly differently rotated and shows the separation of subsets of oat varieties showing contrasting compound contents when grown in either clay or sandy soil. PC1, X-axis, 32.0%; PC2, Y-axis, 21.1%; PC3, Z-axis, 14.3%.