Fig. 4
From: Genome-wide study of salt tolerance in USDA tomato germplasm at seedling stage
Population genetic diversity analysis of the association panel consisting of 265 USDA tomato germplasm accessions. (A) Three-dimensional principal component analysis (PCA) plot illustrating the distribution of genetic variation among accessions. (B) PCA eigenvalue plot generated by GAPIT 3, indicating the proportion of variation explained by each principal component. (C–D) Phylogenetic trees constructed using the neighbor-joining (NJ) method to visualize relationships among accessions, displayed as (C) fan-shaped and (D) unrooted trees, revealing three distinct sub-populations.
