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. 2021 Dec 22;12:756877. doi: 10.3389/fpls.2021.756877

FIGURE 1.

FIGURE 1

Principal component analysis (PCA) plots showing genetic diversity of wheat and barley accessions used for SNP discovery. (A) About 6,087 wheat accessions were genotyped with the iSelect wheat 90K SNP array (Wang et al., 2014) (black), exome-sequenced accessions used for linkage disequilibrium (LD) analysis (red), and synthetic derivative accessions capturing D-genome diversity (blue); and (B) 19,778 barley accessions genotyped with GBS (Milner et al., 2019) (black), with exome-sequenced accessions used for LD analysis (red).