Domestic dogs have great diversity in white spotting patterns ranging from extreme white to minimal white or completely solid color. The amount of white color is determined by genetic factors as well as by stochastic events in pigment cell development. It is important to understand that white color in domestic dogs is controlled by many variants as well as random events in the maturation of the cells.
Coat Furnishings (moustache and eyebrows) / Improper Coat in Portuguese Water Dogs, variant chr13:11659792
Coat Furnishings (moustache and eyebrows) / Improper Coat in Portuguese Water Dogs, variant chr13:11676852
This test is based on two genetic variants whose presence in the dog's genome is strongly associated with the furnishings phenotype.