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The pearl dilution gene (SLC45A2) dilutes the colour of the coat, mane, tail and skin.
10 working days
Specifications
Breeds | American Paint Horse, Lusitano, Purebred Spanish horse, Quarter Horse |
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Gene | |
Organ | |
specimen | Hair, Blood EDTA, Blood Heparin, Semen, Tissue |
Mode of Inheritance | |
Chromosome | |
Year Published |
General information
The pearl dilution gene (SLC45A2) dilutes the colour of the coat, mane, tail and skin. It is also referred to as the ‘Barlink Factor’ and often resembles the champagne dilution. Pearl is a rare dilution and only red pigment is diluted by the pearl dilution gene. The allele Prl, causing the Pearl dilution is recessive. This means that only horses with two copies of the Prl allele have a lightened coat, mane and tail, in addition to bright eye colours.
Clinical features
A chestnut basic colour is diluted to a pale, uniform apricot colour of body, mane and tail, in addition to bright eye colours. Skin coloration is also pale. Pearl dilution interacts with Cream dilution to produce pseudo-double dilute horses including pale skin and blue/green eyes. If a horse has one copy of the Prl allele and Cream dilution (Cr allele) is also present, this results in a pseudo-double dilute, also called pseudo-cremellos or pseudo-smoky cream.
Additional information
References
Pubmed ID: 30968968
Omia ID: 1344