Phylogenetic and Population Structure
PCA (Principal Components
Analysis)
was carried out using the EIGENSOFT [52]. A phylogenetic tree was
constructed from the SNPs data by using the neighbor-joining method in
the program PHYLIP [53] and graphical demonstration was provided by
using the Newick Utilities [54]. Population structure was further
inferred using Admixture [55] with kinship (K ) set from 2 to
10, according to the K -values with the smallest CV
(Cross-Validation) error is the optimal K values.