|
|
|
|
|
1 ) Progressive Retinal Atrophy (GR-PRA1)
|
| |
|
Kennel Club
|
|
This test is part of the Official UK Kennel Club DNA Testing Scheme in Golden Retriever.
|
|
|
|
The Disease |
 |
Progressive retinal atrophy (PRA) is a leading 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.
The retina is a thin layer of neural cells that lines the back of the eyeball. The vertebrate retina contains photoreceptor cells (rods and cones) that respond to light. The cones mediate high-resolution vision and colour vision. The rods mediate lower-resolution, black-and-white, night vision. The degeneration of the retina results in loss of vision, often leading to blindness. 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. Currently, there is no treatment for the disease.
Golden Retriever:
Three different mutations causing PRA have been identified in the Golden Retrievers breed: the well-known prcd-PRA , the GR_PRA1 mutation and
GR_PRA2 which were recently identified by researchers of the Animal Health Trust and the university of Uppsala.
LABOKLIN offers DNA testing for all three mutations individually in addition to a special discounted offer for the combined testing of the three mutation. Details of the special offer can be found on this link: Golden Retriever PRA Special offer. |
|
|
|
|
Trait of Inheritance |
|
Autosomal recessive
|
Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
|
|
Dam
|
|
Offspring
|
| |
|
|
|
|
|
clear
|
 |
clear
|
 |
100% clear
|
| |
|
|
|
|
|
clear
|
|
carrier
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
clear
|
|
affected
|
|
100% carriers
|
| |
|
|
|
|
|
carrier
|
|
clear
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
carrier
|
|
carrier
|
|
25% clear + 25% affected
+ 50% carriers
|
| |
|
|
|
|
|
carrier
|
|
affected
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
clear
|
|
100% carriers
|
| |
|
|
|
|
|
affected
|
|
carrier
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
affected
|
|
100% affected
|
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 (GR-PRA1). The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.
Carrier
Genotype: N / GR-PRA1 [ 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 (GR-PRA1) 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: GR-PRA1 / GR-PRA1 [ 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 (GR-PRA1) 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 ) Progressive Retinal Atrophy (GR-PRA2)
|
| |
|
Kennel Club
|
|
This test is part of the Official UK Kennel Club DNA Testing Scheme in Golden Retriever.
|
|
|
|
The Disease |
|
Progressive retinal atrophy (PRA) is a leading 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.
The retina is a thin layer of neural cells that lines the back of the eyeball. The vertebrate retina contains photoreceptor cells (rods and cones) that respond to light. The cones mediate high-resolution vision and colour vision. The rods mediate lower-resolution, black-and-white, night vision. The degeneration of the retina results in loss of vision, often leading to blindness. 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. Currently, there is no treatment for the disease.
Golden Retriever:
Three different mutations causing PRA have been identified in the Golden Retrievers breed: the well-known prcd-PRA , the GR_PRA1 mutation and
GR_PRA2 which were recently identified by researchers of the Animal Health Trust and the university of Uppsala.
LABOKLIN offers DNA testing for all three mutations individually in addition to a special discounted offer for the combined testing of the three mutation. Details of the special offer can be found on this link: Golden Retriever PRA Special offer. |
|
|
|
|
Trait of Inheritance |
|
Autosomal recessive
|
Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
|
|
Dam
|
|
Offspring
|
| |
|
|
|
|
|
clear
|
|
clear
|
|
100% clear
|
| |
|
|
|
|
|
clear
|
|
carrier
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
clear
|
|
affected
|
|
100% carriers
|
| |
|
|
|
|
|
carrier
|
|
clear
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
carrier
|
|
carrier
|
|
25% clear + 25% affected
+ 50% carriers
|
| |
|
|
|
|
|
carrier
|
|
affected
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
clear
|
|
100% carriers
|
| |
|
|
|
|
|
affected
|
|
carrier
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
affected
|
|
100% affected
|
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 (GR-PRA2). The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.
Carrier
Genotype: N / GR-PRA2 [ 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 (GR-PRA2) 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: GR-PRA2 / GR-PRA2 [ 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 (GR-PRA2) and will pass the mutant gene to its entire offspring
|
|
|
|
Sample Requirements |
Whole blood in EDTA tube (0.5 - 1 ml) or Buccal swabs. . |
|
|
| |
|
3 ) Ichthyosis *
|
|
Kennel Club DNA Testing Scheme |
|
Official UK Kennel Club DNA testing scheme in Golden Retriever from January 2014
|
|
|
|
| |
|
Kennel Club
|
|
This test is part of the Official UK Kennel Club DNA Testing Scheme in Golden Retriever.
|
|
|
|
The Disease |
|
Ichthyosis is a genetic disease causing dysfunction of the keratin in the skin, which leads to the production of large, differently pigmented skin scales. Due to the fish-like look of this scales the name was formed from the Greek word for fish: „Ichthýs“. Additionally, the pigmentation of the skin can be altered.
Dogs which are affected by this dermatosis develop first symptoms soon after birth. Unfortunately, there is no treatment for this disease. In some cases, formation of scales decreases in old dogs. |
|
|
|
|
Trait of Inheritance |
|
Autosomal recessive
|
Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
|
|
Dam
|
|
Offspring
|
| |
|
|
|
|
|
clear
|
|
clear
|
|
100% clear
|
| |
|
|
|
|
|
clear
|
|
carrier
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
clear
|
|
affected
|
|
100% carriers
|
| |
|
|
|
|
|
carrier
|
|
clear
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
carrier
|
|
carrier
|
|
25% clear + 25% affected
+ 50% carriers
|
| |
|
|
|
|
|
carrier
|
|
affected
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
clear
|
|
100% carriers
|
| |
|
|
|
|
|
affected
|
|
carrier
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
affected
|
|
100% affected
|
Clear
Genotype: N / N [ Homozygous normal ]
The dog is noncarrier of the mutant gene.
It is very unlikely that the dog will develop Ichthyosis *. The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.
Carrier
Genotype: N / Ichthyosis [ 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 Ichthyosis * 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: Ichthyosis / Ichthyosis [ 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 Ichthyosis * and will pass the mutant gene to its entire offspring
|
|
|
|
Sample Requirements |
Whole blood in EDTA tube (0.5 - 1 ml) or Buccal swabs. . |
|
|
| |
|
Price
for the above 3 tests
|
|
£ 126.00 (including VAT)
|
|
|
 |
| To order:
-
Download
Order Form from this link 
-
Complete the order form and send it together
with your samples to the following address:
Laboklin (UK), 125 Northenden Road, Manchester, M33 3HF
|
|
|
|
