Couleur de la robe Appaloosa 1 – PATN1

While leopard complex spotting (LP; an incompletely dominant mutation) produces a collection of unique depigmentation patterns in the horse, other loci are responsible for modification of the extent of white. Pattern-1 (PATN1) is one of the indicated genes with a major modifying effect of LP for patterning. Horses with the more extreme white patterns (termed leopard and few-spot) have a parent with the same level of patterning, making it a single dominant mode of inheritance. This modifier has been termed PATN1 for pattern-1 or the first LP pattern modifier.