Fig. 5

Introgression at the BCO2 gene region. a. Manhattan plot of D values between Canada local chickens and grey junglefowl. The dashed line indicates the significance threshold (top 1% of the distribution of D values). b. ML tree constructed with the BCO2 gene sequence. The introgression event was highlighted with orange color, the introgressed chickens and the grey junglefowl were highlighted with red and blue color, respectively. c. Mean pairwise sequence divergence at the BCO2 gene region between the introgressed individuals (INDOC) and either grey junglefowl (GyJ) or remaining non-introgressed domestic chickens (ODOC), represents by red and blue lines, respectively. The shaded area represents the BCO2 gene region