Hereditary equine regional dermal asthenia (HERDA)

Why test for HERDA?

HERDA is an autosomal recessive disorder, meaning that it is not sex-linked, and that HERDA carriers with one copy of the gene are not affected. HERDA is part of the Quarter Horse and Paint Horse 5-panel, and is most commonly found in cutting lines.

Horses with two copies of the HERDA gene have extremely fragile skin, particularly along their back. Their skin can rip or tear easily, and the large wounds that result from this tearing are painful and like most wounds on horses carry a substantial risk of infection.

Our test is based on the single nucleotide polymorphism identified by Tryon et al. (2007): doi:10.1016/j.ygeno.2007.03.009

HERDA

HERDA lesions usually occur on the back and can be very large. Image linked from here.

Purchase equine DNA testing

Price per horse = sample processing ($40) + tests

Inherited disorders

Pure and part-bred Arabian

$14 Cerebellar abiotrophy (CA) ...read more
$14 Severe combined immune deficiency (SCID) ...read more
$14 Lavender foal syndrome (LFS) ...read more

Fell Ponies, Dale Ponies and Gypsy horses

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

Pure and part-bred Friesian

$19 Friesian dwarfism ...read more
$14 Hydrocephalus (Friesian and other breeds) ...read more

Various breeds

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

Quarter horses and related breeds

$14 Malignant hyperthermia (MH) ...read more
$14 Hyperkalemic periodic paralysis (HYPP) ...read more
$14 Hereditary equine regional dermal asthenia (HERDA) ...read more
$19 Glycogen branching enzyme deficiency (GBED) ...read more

Saddlebred horses and related breeds

$14 Junctional epidermolysis bullosa, Saddlebred form (JEB) ...read more

Coat colour tests

Base coat colours

$9 Agouti (the bay factor) ...read more
$9 Extension (red/black) ...read more

Coat colour dilutions

$9 Cream ...read more
$9 Dun and d1 ...read more
$9 Silver ...read more
$9 Champagne ...read more
$9 Pearl ...read more

Coat patterns

$9 Grey ...read more
$9 Appaloosa or leopard (CSNB) ...read more
$9 PATN1 ...read more
$9 SW1 (Splashed White 1) ...read more
$9 SW2 (Splashed White 2) ...read more
$9 Frame overo (OLWS) ...read more
$9 Tobiano ...read more
$9 Sabino 1 ...read more
$9 W13 dominant white (Miniatures) ...read more
$9 W20 white markings ...read more
$9 W25 dominant white (TB) ...read more
$9 W26 dominant white (TB) ...read more
$9 W27 dominant white (TB, Paint) ...read more
$9 Roan marker ...read more

Parentage/DNA profile

$33 DNA profile (microsatellite) ...read more

Remember: most breed societies ask members to test through their society.

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