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Heterozygous indigo blue bar.)
Heterozygous grizzle on a blue bar Valencian Figurita pigeon.
Locus G locus
Genetic symbol G
Common name Grizzle
Inheritance Autosomal dominant
Mutation type Colour modifier
History Ancient
Commonly found in breeds such as: Many

Grizzle is an allele at the G locus. This mutation is dominant to wild type.


A lightening or whitening of the pigeon's feathers. When homozygous the effect is much more pronounced.


Grizzle is an autosomal dominant mutation. This means that only one parent of either sex needs to carry the mutant gene for it to express in the next generation. Unless it is hidden by another modifier, a pigeon not expressing this trait will not pass it onto its children.