Birds are among the most colourful terrestrial vertebrates, with various plumage colours and patterns. We conducted a genome‐wide association study (GWAS) on an intercross F 2 population of Pekin ducks and mallards ( n = 722) and identified a 1.57‐Mb genetic region (Chr11: 20,176,480–21,750,101 bp) related to duck melanism. Fine mapping by linkage disequilibrium (LD) and F ST analysis narrowed the final candidate region to a r...

Avian egg coloration is shaped by natural selection, but its genetic basis remains unclear. Here, we used genome‐wide association analysis and identity by descent to finely map green egg colour to a 179‐kb region of Chr4 based on the resequencing of 352 ducks ( Anas platyrhynchos ) from a segregating population resulting from the mating of Pekin ducks (white‐shelled eggs) and mallards (green‐shelled eggs). We further narrowed...