Coat,  Color,  Merle



DNA Test: Merle – UC Davis

(Listed for Pyrenean Shepherds)


Retrotransposon insertion in SILV is responsible for merle patterning of the domestic dog (Leigh Anne Clark, Jacquelyn M. Wahl, Christine A. Rees, and Keith E. Murphy)

Intro – Merle is a pattern of coloring observed in the coat of the domestic dog and is characterized by patches of diluted pigment. This trait is inherited in an autosomal, incompletely dominant fashion. Dogs heterozygous or homozygous for the merle locus exhibit a wide range of auditory and ophthalmologic abnormalities… (NOTE: The Pyrenean Shepherd is referenced in this article.)

The Merle Gene in the Pyrenean Shepherd 

Intro – As in many other breeds, the Pyrenean Shepherd is a breed that includes the distinctive merle color pattern. In France and many other European countries, this color is limited to blue merle (called harlequin in France). The standard in the US allows for “merles of diverse tones”, which includes blue merles, brindle merles, and fawn merles.