Vidal O, Araguas RM, Fernández R, Heras S, Sanz N, Pla C. Melanism in guinea fowl (Numida meleagris) is associated with a deletion of Phenylalanine‐256 in the MC1R gene. Animal Genetics. 2010 Nov 10;41(6):656–8. doi: 10.1111/j.1365-2052.2010.02056.x.