W-locus coat colour / Dominant White and White Spotting (KIT-related) - Cat

The W locus in cats

This genetic analysis tests KIT variants at the W locus that determine white coat patterns in cats. The key terms are Dominant White, where the cat can be fully or almost fully white, and White Spotting, where white markings or larger white areas develop.

What does this mean for the coat?

KIT plays an important role in migration and development of pigment cells. A Dominant White allele can strongly suppress coat pigmentation. White Spotting usually produces partial white markings, ranging from small white areas to more extensive patterns. The final amount of white can vary between animals.

Practical value of this test

• Distinguishes no tested KIT variant, Dominant White and White Spotting.
• Helps predict which white markings a cat can show or pass on.
• Supports breeding plans for white cats and cats with white spotting.

Inheritance

Dominant White acts dominantly. White Spotting can vary in amount and expression. Interpretation should consider the combination of the tested KIT alleles together.