Figure 3.

Principal component analysis (PCA) of gene expression and alternative splicing regulation in the A subgenome of select wheat and grass species. PCA based on PSI values (a) or based on gene expression (GE) (b) of five lines from wheat and ancestral grass species. X‐axis and Y‐axis indicate two principal components (PC), PC1 and PC2, respectively. The grain tissues, including early and late stages of embryo, are labelled with different shapes, and ploidy levels are colour‐coded (see insets). The fraction of variance explained by each principal component is indicated in the following bracket. Embryo_early, E01–E03; Embryo_late, E04–E07; Endosperm, E08–E09; Pericarp, E10. Hexaploid, AC Barrie (AC) and Chinese Spring (CS); Tetraploid, CDC Commander (CM) and CDC Strong Field (ST); Diploid (DV), Triticum monococcum DV92.