(z) Gazzi pigeon genetics

A Modena pigeon showing z//z in the Blue/Black colour with bronzing on the wing shield. Photo by Jim Gifford.

Gazzi (symbol z) is perhaps the best-understood of the myriad of “pied” modifier genes in domestic pigeons.

This colouration is probably best known in the Modena and Strasser breeds (although there is some evidence that Gazzi in Strassers may actually be controlled by genes other than z//z!). In the homozygous form it presents as a pigeon with a coloured head, wingshield, flight feathers and tail – with the neck, breast and remainder of the body white.

Gazzi appears to be a simple recessive trait. Strong evidence also suggests that recessive white (zwh) is an allele of gazzi.

Discuss this mutation on the PigeonGenetics.com Forums.