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Dun and d1 (nd1)

Summary

The dun coat colour in horses dilutes both red and black pigment by limiting the distribution of pigment granules to a small part of the hair shaft. This dilution is accompanied by darker undiluted markings that can include a dorsal stripe (most commonly), leg barring, dark ear tips, and shoulder bars. The face and points of dun horses are also usually darker than their bodies.

The coat colour and markings associated with d1 (also called nd1) are less intense than dun, but follow the same pattern. Horses that are positive for d1 but not dun are NOT considered to be dun.

Gene or region and technical reference

Gene: TBX3 (causative). Reference: Imsland et al. (2016)

Reported alleles

n. Test developed using manufactured DNA, animal controls.

D. Test developed using manufactured DNA, animal cases.

d1. Test developed using manufactured DNA, animal cases.


horse

Miniature horse stallion Silver Star King Of Cool shows us his dorsal stripe and mane frosting. He is a splashed white dunskin.

Order tests

There is a one-off sample processing fee of $40 per animal plus the cost of your tests.

How many animals are you testing? Discount or society code:


Pedigree

$33 DNA profile ... more


Panels


Colour panels

$40 Dilutions panel ... more

$120 Full colour panel ... more

$70 Patterns panel ... more


Panels by breed

$40 Friesian panel ... more

$50 Miniature ACAN panel ... more

$250 Miniature full panel ... more

$90 QH disorder panel ... more

$160 QH full panel ... more


Good looks


Coat colour

$9 Agouti (bay factor) ... more

$9 Red/black ... more


Coat pattern

$9 Frame overo/lethal white syndrome (OLWS) ... more

$9 Grey/melanoma ... more

$9 Lp/Appaloosa/night blindness (CSNB) ... more

$9 PATN1 coat pattern modifier (PATN1) ... more

$9 Roan marker ... more

$9 Sabino 1 ... more

$9 Splashed white 1/deafness (SW1) ... more

$9 Splashed white 2/deafness (SW2) ... more

$9 Splashed white 3/deafness (SW3) ... more

$9 Tobiano ... more

$9 W13 dominant white (W13) ... more

$9 W20 white markings (W20) ... more

$9 W22 dominant white (W22) ... more

$9 W25 dominant white (W25) ... more

$9 W26 dominant white (W26) ... more

$9 W27 dominant white (W27) ... more


Colour dilution

$9 Champagne ... more

$9 Cream ... more

$9 Dun and d1 (nd1)

$9 Pearl ... more

$9 Taffy/silver/eye abnormalities (MCOA/silver) ... more


Good health


Paint horses

$9 Splashed white 3/deafness (SW3) ... more


Multiple breeds

$14 Foal immunodeficiency syndrome (FIS) ... more

$14 Fragile foal syndrome (FFS) ... more

$9 Frame overo/lethal white syndrome (OLWS) ... more

$9 Grey/melanoma ... more

$9 Lp/Appaloosa/night blindness (CSNB) ... more

$14 Polysaccharide storage myopathy 1 (PSSM1) ... more

$9 Splashed white 1/deafness (SW1) ... more

$9 Taffy/silver/eye abnormalities (MCOA/silver) ... more


Pure- and part-bred Akhal-Tekes

$14 Naked foal syndrome (NFS) ... more


Pure- and part-bred Arabians

$14 Cerebellar abiotrophy (CA) ... more

$14 Lavender foal syndrome (LFS) ... more

$14 Occipitoatlantoaxial malformation (OAAM) ... more

$14 Severe combined immune deficiency (SCID) ... more


Pure- and part-bred Connemaras

$14 Hoof wall separation disease (HWSD) ... more


Pure- and part-bred Friesians

$14 Friesian dwarfism ... more

$14 Hydrocephalus ... more


Pure- and part-bred Miniature horses

$14 D1 form of Miniature dwarfism (D1) ... more

$14 D2 form of Miniature dwarfism (D2) ... more

$14 D3 form of Miniature dwarfism (D3) ... more

$14 D4 form of Miniature dwarfism (D4) ... more

$140 Skeletal atavism (SA) ... more


Pure- and part-bred Quarter Horses and Paints

$14 Glycogen branching enzyme deficiency (GBED) ... more

$14 Hereditary equine regional dermal asthenia (HERDA) ... more

$14 Hyperkalaemic periodic paralysis (HYPP) ... more

$14 Immune mediated myositis (IMM) ... more

$14 Malignant hyperthermia (MH) ... more

$9 Splashed white 2/deafness (SW2) ... more


Pure- and part-bred Saddlebreds

$14 Junctional epidermolysis bullosa (JEB2) ... more


Good moves


Gaited horses

$9 Lateral gait marker ... more

Tests can be in the list more than once when the gene in question has more than one effect. It is OK to select the same test once or more than once, the price is the same.