2.11 Selection signature analysis
Two complementary approaches based on the allele frequencies of variable sites were used to identify regions potentially affected by long-term selection. We calculated population fixation statistics (FST) and nucleotide diversity (θπ) for each sliding window in 10-kb windows with 5-kb step size. We Z-transformed the distribution of FST and calculated the log value of θπ ratios. Top 5% of log-odds ratios for both θπ and FST were chosen as putative selection targets.
Results