Frame overo including Lethal White Syndrome

Why test for frame overo?

Frame overo markings include eye-catching white patches, and often a white face accompanied by one or two blue eyes. The amount of white on a frame overo horse or pony can be highly variable, from a very discrete patch of white on the belly all the way up to majority white coat colours.

Frame overo is unique amongst white coat colour patterns in that foals born with two copies of the frame overo gene suffer from the heart-breaking and fatal Overo Lethal White Syndrome. Testing helps breeders avoid crosses that could produce Lethal White Syndrome foals.

Read more about frame overo and OLWS and ask questions here...

Frame overo

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Purchase equine DNA testing

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

Inherited disorders

Pure and part-bred Arabian

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

Fell Ponies, Dale Ponies and Gypsy horses

$14 Foal immunodeficiency syndrome (FIS) more

Pure and part-bred Friesian

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

Various breeds

$14 Polysaccharide storage myopathy type 1 (PSSM1) more

Quarter horses and related breeds

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

Saddlebred horses and related breeds

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

Coat colour tests

Base coat colours

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

Coat colour dilutions

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

Coat patterns

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

Parentage/DNA profile

$33 DNA profile (microsatellite) more

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

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Need different tests for each horse? You can customise your choices for each horse on next page.