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Progressive retinal atrophy ( rcd4-PRA) / LOPRA
Test number: 8435 (this test number replaces the old 8239D)
Gene: rcd4
Price: £ 48.00 (including VAT)
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Breeds
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Australian Cattle Dog
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Bolonka Zwetna (Tsvetnaya Bolonki)
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Cavapoo
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Cockapoo (English)
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Cockapoo (American)
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Dwarf poodle
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English Setter
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Gordon Setter
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Irish Red and White Setter
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Irish Setter (Red Setter)
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Labradoodle
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Miniature Poodle
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Old Danish Pointing Dog
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Polish Lowland sheepdog
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Poodle
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Small Munsterlander
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Standard Poodle
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Tatra Shepherd Dog (POP)
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Tibetan Terrier
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Toy Poodle
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Kennel Club
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This test is part of the Official UK Kennel Club DNA Testing Scheme in English Setter, Gordon Setter, Irish Setter (Red Setter), Standard Poodle, and Tibetan Terrier.
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.
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The Disease |
Progressive retinal atrophy (PRA) is a major hereditary cause of blindness in pedigree dogs as is its counterpart retinitis pigmentosa (RP) in humans. PRA shows genetic heterogeneity, as does RP, with several distinct forms already recognized and several more remaining to be investigated.
One can distinguish between late onset forms of PRA and early onset (whelp-age) dysplastic changes. The clinical and ophthalmologic signs of both forms are similar. Affected dogs suffer from bilateral Mydriasis, the reflection of the Tapetum lucidum is increased and the retinal vascular network appears atrophic.
The rcd4 PRA is another form of PRA, it is also known as LOPRA (Late Onset PRA) the age of onset of dogs with LOPRA varies from few years of age (2-3 years) up to old age (10-11 years) |
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Trait of Inheritance |
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Autosomal recessive
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Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
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Dam
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Offspring
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clear
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clear
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100% clear
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clear
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carrier
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50% clear + 50%
carriers
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clear
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affected
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100% carriers
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carrier
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clear
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50% clear + 50%
carriers
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carrier
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carrier
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25% clear + 25% affected
+ 50% carriers
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carrier
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affected
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50% carriers + 50%
affected
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affected
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clear
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100% carriers
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affected
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carrier
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50% carriers + 50%
affected
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affected
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affected
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100% affected
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Clear
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 ( rcd4-PRA) / LOPRA. The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.
Carrier
Genotype: N / rcd4 [ 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 ( rcd4-PRA) / LOPRA 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)
Affected
Genotype: rcd4 / rcd4 [ 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 ( rcd4-PRA) / LOPRA and will pass the mutant gene to its entire offspring
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Price
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£ 48.00 (including VAT)
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