2.4 | Diversity analysis
SNP density was counted with a 10 kb sliding window using VCFtools (v0.1.13) software (Danecek et al., 2011). Genome-wide nucleotide diversity (π ) and Tajima’s D were computed by sliding windows of 1 kb using all individuals in each population using VCFtools (v0.1.13). The Weir-Cockerham fixation index (Fst ) was estimated among three populations with genotype data using the VCFtools (v0.1.13).