Fig. 5

Identification of genomic regions in Xichuan black-bone chickens with strong selective sweep signals. a Selective sweep signals are located to the left and right of the vertical dashed lines (representing Pi ratio values > 0.95 or < 0.05, respectively), and above the horizontal dashed line (representing an Fst value > 0.17). Regions selected for black skin are shown using blue points, while other skin colors are shown in green. The x-axis shows the pi ratio between black-skin and non-black-skin groups, and the y-axis shows the Fst values. b Genes with selective sweep signals in black and non-black skin. The shaded genomic regions contain selective signals for both skin types. pop1 and pop2 represent black skin non-black skin, respectively