Fig. 1.

Phylogenetic tree (A) and PCA (B) of wild barley populations inhabiting Terra Rossa and basalt soils at the Tabigha Evolution Slope. (A) Phylogenetic tree was constructed using the neighbor-joining method, and the percentage of trees from 1,000 bootstrap replications in which the associated taxa clustered together are shown next to the branches. Circles in both A and B indicate barley genotypes from Terra Rossa (red) and basalt (blue) soil types. PCA 1, the first principal component; PCA 2, the second principal component.