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Population genetic diversity analysis of 201 USDA spinach accessions. Phylogenetic trees drawn by neighbor-joining (NJ) method showing in (fan) (A). unrooted (B), and 3D graphical plot of the principal component analysis (PCA) in two sub-population (C) and PCA eigenvalue plot drawn (D) drawn by GAPIT 3. A readable phylogenetic tree for each accession is shown in Supplementary Fig. S2.
