Columbian

Introduction to the mutation that is described on this page. Allele symbol Co.

Etymology and Discovery

Named after a poultry exhibition in Columbia ^?

Degree of dominance

Dominance order; see also Heterozygosity.

Phenotypic effect

Removes black/eumelanin from the body (breast and wingbands). Neck hackle black is not caused by this gene in the Columbian phenotype.

chick down

Removes/blurs chipmunk striping

rooster

Effective in one dose.

hen

Less powerful than on males.

Heterozygosity

• On females leaves smut on upper body, if any black pattern is removed.
• Removes the salmon breast of the females.

Epistatics

Suppressed by the stronger melanizing e-locus alleles Extended Black and Birchen.

Role in certain complex phenotypes

• Single Laced including or excluding the tail
• Quail
• Lakenvelder