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Roan Zygosity*
Test number: 8228 (this test number replaces the old 8153H)
Price: £ 78.00 (including VAT)
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Description |
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Roan is a white patterning coat coloUr trait of intermixed white and colored hairs in the body while the head, lower legs, mane and tail remain colored. Roan horses are born with the pattern, though it may not be obvious until the foal coat is shed. The white and colored hairs are evenly mixed in horses that inherit the classic Roan gene, which can differentiate this from several mimic patterns called roaning. Roaning patterns tend to be uneven in the distribution of white hairs and the inheritance of roaning has not been defined.
Although it has been suggested that Roan is a homozygous lethal, evidence from the Quarter Horse breed indicates otherwise. Production records have documented the existence of Roan Quarter Horses that produce 100% Roan foals. DNA tests have confirmed homozygosity in the genomic region that contains the Roan gene.
Roan is inherited as a dominant gene but the specific mutation has not yet been identified, so there is no direct test for the gene. VGL has identified DNA markers in Quarter Horses and Paints associated with Roan that can be used to determine if a horse has the roan gene and how many copies.
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Sample Requirements |
Hair Sample from mane with roots (approx 30 hairs) or 1 ml whole blood in EDTA tube.
How to obtain a viable hair sample
Pull around 30 hairs from the mane of the horse with the roots (in faols hair from the tail maybe taken). Wrap the hairs around your finger or a comb, as close as possible to the skin to ensure you obtain the hair roots. Keep dry, put in a bag, label the bag with the horse name, test (s) required. Place in an envelope and send back to us together with the order form. Broken or cut off hair will not be accepted.
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Price
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£ 78.00 (including VAT)
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| See also: |
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Coat Colour chestnut (Red Factor)
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Appaloosa Pattern 1 (PATN-1) *
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Tobiano (Tobiano Spttings) / (Paint, Pinto, Tinker)
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Greying
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Coat Colour Champagne
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Sabino -1
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Dominant white (GQ Santana dominant white W5, W10, W13, W20 and W22)*
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Dun Zygosity
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Leopard complex
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Pearl
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Splashed white (SW1 , SW2 , SW3 and SW4)
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Coat Colour black / Bay (Agouti)
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Camarillo White - W4
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Curly Coat
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Coat colour Sunshire Dilution / Dilute
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Mushroom
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Silver Coat Colour Dilution / MCOA
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Brindle 1 (BR1) (irregular vertical striped pattern )
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Splashed white (SW5 , SW6) *
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Bundle: Basic Coat Colour (Agouti + Red Factor / Chestnut )
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Bundle: Dilutions Coat Colour (Cream, Champagne, Dun Zygosity, Silver, Pearl)
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Bundle: White Patterns Coat Colour (LWO, Leopard complex, Appaloosa Pattern, Tobiano, Splashed White, Sabino)
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Snowdrop dilution
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Incontinentia Pigmenti (IP)
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Coat Colour Cream / Dilution / Dilute
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