Tsasan

Tsasan is a white marking that gives the horse the appearance of having rolled in white paint. It starts from the dorsal line and extends down, stopping around the belly and excluding the legs. Tsasan can cause blue eyes, regardless if the white touches the eyes. Tsasan is a solid marking and will not have any spotting.

The geno code for Tsasan is written as:
nTs

Dominant Tsasan (TsTs) is not viable. Foals that receive two copies of the gene will be born infertile or stillborn.