The selective sweep signatures in the peak region on chromosome 2. The average Tajima’s D (A) and nucleotide diversity (π, B) for sliding window sizes of 5 kb in rumpless Piao and normal chickens. The FLK (C) and hapFLK (D) analyses also show a selection signature in the same target region. Results are obtained using individual genotyping data from the rumpless Piao and 8 normal stocks.