extremely significantP -value < 0.01
As a result, 1,924 genes possibly under positive selection were identified in the FAN genome ( K a/ K s > 1); of these genes, 564 show significant evidence of positive selection ( P -value < 0.05), and 510 PSGs show extremely significant evidence of having undergone positive selection ( P -value < 0.01; Supplementary Table S3).