LABOKLIN (UK)| Genetic Diseases | Dogs| Progressive Retinal Atrophy (prcd-PRA): (8094P / 8127)
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Progressive Retinal Atrophy (prcd-PRA): (8094P / 8127)

Test number: 8127 (this test number replaces the old 8094P)
Gene: PRA
Price: £ 66.00 (including VAT)
Kennel Club: results of this test is accepted by the Kennel Club
All Dog Breeds , American Cocker Spaniel , American Eskimo , Australian Cattle Dog , Australian Shepherd , Australian Stumpy Tail Cattle Dog , Australian Stumpy tail cattle Dog , Barbet (French Water Dog) , Bearded Collie , Bolognese , Bolonka Zwetna (Tsvetnaya Bolonki) , Cavapoo , Chesapeake Bay Retriever , Chihuahua , Chinese Crested , Cockapoo (English) , Cockapoo (American) , Cocker Spaniel , Dwarf poodle , English Cocker Spaniel , English shepherd , Entlebuch Mountain dog , Finnish Lapphund , German Spitz (Mittel) , Giant Schnauzer , Golden Retriever , Goldendoodle , Jack Russell Terrier , Japanese Chin , Karelian Bear Dog , Kuvasz , Labradoodle , Labrador Retriever , Lagotto Romagnolo , Lapponian Herder , Markiesje , Miniature Poodle , Miniature American Shepherd , Norwegian Elkhound , Nova Scotia Duck tolling Retriever ( NSDTR / Toller) , Parson Russell Terrier (PRT) , Poodle , Portuguese Waterdog , Schipperke , Australian Silky Terrier , Spanish Water Dog , Standard Poodle , Swedish Lapp Hund , Toy Poodle , Waeller (Wäller) , Yorkshire Terrier .
Kennel Club
This test is part of the Official UK Kennel Club DNA Testing Scheme in American Cocker Spaniel, Australian Cattle Dog, Australian Shepherd, Barbet (French Water Dog), Chesapeake Bay Retriever, Chinese Crested, Cocker Spaniel, English Cocker Spaniel, Entlebuch Mountain dog, Finnish Lapphund, Giant Schnauzer, Labrador Retriever, Miniature Poodle, Norwegian Elkhound, Nova Scotia Duck tolling Retriever ( NSDTR / Toller), Portuguese Waterdog, Spanish Water Dog, Standard Poodle, and Toy Poodle.

for UK registered dogs, Laboklin can send results of the tests which are part of the Official UK Kennel Club DNA testing scheme to the Kennel Club (KC) to be recorded and published as part of the Kennel Club scheme. Results will only be recorded and published by the KC if the result report includes the dog’s microchip or tattoo number along with either the dog’s registered name or registered number. Any test results that do not carry these identifying features will not be recorded by the Kennel Club.

In order to ensure that test results are sent to the Kennel Club, customers must also sign the declaration section on the order form to give Laboklin permission to do so.

important: When you sign the declaration, Laboklin will send the results to the KC on your behalf, and you do not need to send them to the KC yourself again to avoid unnecessary duplications.

The Disease
Progressive retinal atrophy (PRA) as an inherited disease occurs in many dog breeds and also in different forms. The form of progressive rod-cone degeneration (prcd-PRA) is a photoreceptor degeneration in dogs with varying ages of onset. This genetic disorder causes the degeneration of retinal cells in the eye: firstly, rod cells are affected, thus leading to progressive night blindness. Secondly, degeneration of the cone cells results in complete blindness of the dog, even in full light situations during the day.

Age of onset of clinical symptoms is typically in early adolescence or early adulthood. However, the onset of the disease may vary among different dog breeds.

Since diagnosis of retinal diseases in dogs may prove difficult, the genetic test on prcd-PRA helps to diagnose a specific disease and is also a useful tool for breeders to eliminate the mutated gene from the dog population.

Please note that Lapponian Herder can be affected two other forms of PRA, the IFT122-PRA and the Canine Multi-Focal Retinopathy (CMR) which is caused by a mutation in the BEST1-gene.

Trait of Inheritance
The mutation in the PRCD gene which has been suggested to cause prcd-PRA has recently been published by the group of Gustavo D. Aguirre at the University of Pennsylvania, USA, and could be found in several dog breeds. Prcd-PRA is inherited as an autosomal recessive trait. So there are three conditions a dog can be: it can be clear (genotype N/N or homozygous normal) meaning that it does not carry the mutation and will not develop the prcd-form of PRA. Since it also cannot pass the mutation onto its offspring, it can be mated to any other dog.

A dog which has one copy of the PRCD gene with the mutation and one copy without the mutation is called a carrier or heterozygous (genotype N/PRA); while it will not be affected by prcd-PRA, it can pass the mutation onto its offspring and should therefore only be mated to clear dogs. Dogs that develop this form of PRA have two PRCD gene copies with the mutation (genotype PRA/PRA or homozygous affected); they will always pass the mutated gene onto their offspring and should also be mated only to clear dogs..

Inheritance : AUTOSOMAL RECESSIVE trait







100% clear
50%  clear + 50% carriers
100% carriers
50%  clear + 50% carriers
25% clear + 25% affected + 50% carriers
50% carriers + 50% affected
100%  carriers
50% carriers + 50% affected
100% affected



Genotype: N / N [ Homozygous normal ]

The dog is noncarrier of the mutant gene.

It is very unlikely that the dog will develop Progressive Retinal Atrophy (prcd-PRA): (8094P / 8127). The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.



Genotype: N / PRA [ Heterozygous ]

The dog carries one copy of the mutant gene and one copy of the normal gene.

It is very unlikely that the dog will develop Progressive Retinal Atrophy (prcd-PRA): (8094P / 8127) but since it carries the mutant gene, it can pass it on to its offspring with the probability of 50%.

Carriers should only be bred to clear dogs.

Avoid breeding carrier to carrier because 25% of their offspring is expected to be affected (see table above)



Genotype: PRA / PRA [ Homozygous mutant ]


The dog carries two copies of the mutant gene and therefore it will pass the mutant gene to its entire offspring.

The dog is likely to develop Progressive Retinal Atrophy (prcd-PRA): (8094P / 8127) and will pass the mutant gene to its entire offspring
Sample Requirements
Whole blood in EDTA tube (0.5 - 1 ml) or Buccal Swabs.
2-3 weeks
£ 66.00 (including VAT)

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