From PigeonGenetics.com Wiki
Jump to navigation Jump to search
Black - S//S or S//+ at the S locus
Spread (S)
Locus S locus
Genetic symbol S
Common name Spread
Inheritance Autosomal recessive
Mutation type Colour modifier
Description "Spreading" of tail bar colour throughout the bird, so as to create a black pigeon on blue/black pigment.
History Ancient
Commonly found in breeds such as Many, most breeds

Spread is an allele at the S locus. This mutation is dominant to wild type.