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Dun Zygosity
Test number: 8227 (this test number replaces the old 8150H)
Gene: Dun
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Description |
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Dun is a dominant gene that dilutes the color of body hair, leaving the points and head unaffected. Dun horses also show 'primitive markings' consisting of a dark dorsal stripe, leg barring, shoulder stripes and concentric marks on the forehead (spiderwebbing, cobwebbing). The dorsal stripe appears to be a consistent feature of dun horses while the other 'primitive marks' vary and may not all be present, or visible. The effect of the Dun gene on the base colors of chestnut, bay and black produces horses with shades that range from apricot, golden, dark gray, olive, and many, more subtle, variations. Dun is inherited independently of other coat color genes and can occur in combination with any other genes that modify the base colors. The specific mutation that causes Dun has not yet been identified, and there is no direct test for the gene. VGL has identified DNA markers associated with Dun that can be used to determine if a horse has the Dun gene and how many copies.
Explanation of Results:
- Horses with nd2/nd2 genotype will not be dun dilute and will not have primitive markings. They cannot transmit a dun dilution variant to their offspring.
- Horses with nd1/nd2 genotype will not be dun dilute, but may have primitive markings. They may transmit the non-dun 1 variant to 50% of their offspring.
- Horses with nd1/nd1 genotype will not be dun dilute, but may have primitive markings. They will transmit the non-dun 1 variant to all of their offspring.
- Horses with D/nd1 or D/nd2 genotype will be dun dilute and will display primitive markings. They may transmit the dun dilute variant to 50% of their offspring. Matings with N/N genotype will results in a 50% chance of producing a dun dilute foal.
- Horses with D/D genoytpe will be dun dilute with primitive marking and will transmit the dun dilute variant to all of their offspring. Matings with any genotype are predicted to produce dun dilute offspring.
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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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| Number of Coat Colour Tests on the same horse |
Price (including VAT) |
| First Colour test
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£ 48.00
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| Each additional
colour test on the same horse
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£ 24.00
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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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Leopard complex
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Pearl
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Roan Zygosity*
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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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