Coat colour white spotting / roan-ticked / piebald (KIT/USH2A/MITF) - Dog

What does this panel test?

This canine coat-colour DNA test combines three markers that are important for white-pattern traits. The panel tests KIT for Panda white spotting, USH2A for roan/ticked patterns and MITF for piebald or parti-colour through the S-locus. Together, these markers help explain different ways in which white areas, pigmented speckling and irregular white patches can appear in a dog’s coat.

The test is useful because the visible coat does not always tell the full genetic story. A dog may show a pattern clearly, show it only subtly, or pass a relevant allele to offspring. Base colour, breed background and other coat-colour loci can also influence the final appearance, so DNA information gives breeders a stronger basis for planning matings and setting realistic expectations for puppies.

Names used for these patterns

• Panda white spotting is mainly used for the KIT-related pattern in German Shepherd Dogs, with distinctive white markings on areas such as the head, chest, feet and tail.
• Roan and ticked describe pigment appearing in white coat areas. Ticked coats show separate spots; roan coats show a more even mixture of white and pigmented hairs.
• Piebald, parti, particoloured, random white and S-locus are used for MITF-related white patterning that can range from small markings to very extensive white areas.

Practical value of this test

• Helps breeders plan more deliberately when white markings, roan/ticking or piebald patterning are desired or should be managed carefully.
• Shows whether a dog can pass on a tested marker, even when the visible pattern is limited or modified by other coat-colour genes.
• Supports interpretation of litters with white puppies, speckled puppies or unexpected variation in coat pattern.
• Improves mating and selection decisions because some white patterns can become stronger depending on allele dosage and genetic background.

Interpretation nuance

White-pattern traits are often more complex than a single result. Roan and ticking are mainly visible in white coat areas; piebald inheritance can differ between breeds; and the Panda variant is described as a dominant pattern for which live dogs with two copies are not expected. A negative result does not rule out every possible cause of white markings, but it does clarify the status of the markers included in this panel.