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CODE: C128
DNA TEST:
Presence of black, clear red, brown (red), and dilute colors and black or brown pigmentation on the nose.
BREED STANDARDS FOR COAT & NOSE COLORS:
Blue merles and blacks have black pigmentation on the nose (and lips). Red merles and reds have liver (brown) pigmentation on the nose (and lips). On the merles it is permissible to have small pink spots; however, they should not exceed 25% of the nose on dogs over one year of age, which is a serious fault.
Blue merle, black, red merle, red-all with or without white markings and/or tan (copper) points, with no order of preference. The hairline of a white collar does not exceed the point of the withers at the skin. White is acceptable on the neck (either in part or as a full collar), chest, legs, muzzle underparts, blaze on head and white extension from underpart up to four inches, measuring from a horizontal line at the elbow. White on the head should not predominate, and the eyes must be fully surrounded by color and pigment. Merles characteristically become darker with increasing age. Disqualifications: white body splashes, which means white on body between withers and tail, on sides between elbows and back of hindquarters in all colors.
Merle is a common pattern in Australian Shepherd. They can be merles of black, called "blue merle", or merles of brown, called "red merle". A single copy of the merle allele is usually visible; two copies usually result in a dog predominately white.
The gene causing the difference between a black or red merle is the B locus. Red bicolor or red merle dogs are bb.
There are a few Aussies that carry a gene causing the black to look grey and the brown to look pale brown as in Weimaraners. Such paler dogs are dd at the D locus. Grey or dilute is harder to notice in merle dogs and in bicolors or tricolors.
Most Australian Shepherds are atat at the agouti locus so there is no need to test for alleles at the agouti locus. Although DNA tests are not yet available for alleles of the K locus, recent research has shown that black or blue dogs have at least one K allele. Dogs that have tan markings (tricolor or merle with copper) are kk. A few Aussies are bicolor black because they are aa at the agouti locus.
Most Australian Shepherds are EE at the E locus. A few carry an e allele which causes "clear red" if homozygous.
A test for D (dilution) gene represents a test for a common mutation in Australian Shepherds
LINKS:
www.ashgi.org/articles/color.htm
GENOTYPES:
| Genotypes |
Coat Color |
Nose Color |
HiddenColor |
| EEBBDD |
black, bicolor, tricolor or blue merle |
black |
- |
| EeBBDD |
black, bicolor, tricolor or blue merle |
black |
clear red |
| EEBbDD |
black, bicolor, tricolor or blue merle |
black |
brown (red) |
| EeBbDD |
black, bicolor, tricolor or blue merle |
black |
clear red and brown (red) |
| eeBBDD |
clear red, red & white or red merle |
black |
black |
| eeBbDD |
clear red, red & white or red merle |
black |
black and brown (red) |
| eebbDD |
clear red, red & white or red merle |
brown |
brown (red) |
| EEbbDD |
brown(red), brown-tan-and-white or brown merle |
brown |
- |
| EebbDD |
brown(red), brown-tan-and-white or brown merle |
brown |
clear red |
| EEBBDd |
black, bicolor, tricolor or blue merle |
black |
dilute |
| EeBBDd |
black, bicolor, tricolor or blue merle |
black |
clear red, dilute |
| EEBbDd |
black, bicolor, tricolor or blue merle |
black |
brown (red), dilute |
| EeBbDd |
black, bicolor, tricolor or blue merle |
black |
clear red and brown (red), dilute |
| eeBBDd |
clear red, red & white or red merle |
black |
black, dilute |
| eeBbDd |
clear red, red & white or red merle |
black |
black and brown (red), dilute |
| eebbDd |
clear red, red & white or red merle |
brown |
brown (red), dilute |
| EEbbDd |
brown (red), bicolor, tricolor or brown merle |
brown |
dilute |
| EebbDd |
brown (red), bicolor, tricolor or brown merle |
brown |
clear red dillute |
| EEBBdd |
grey bicolor, tricolor, or dilute blue merle |
black |
- |
| EeBBdd |
grey bicolor, tricolor, or dilute blue merle |
black |
clear red |
| EEBbdd |
grey bicolor, tricolor, or dilute blue merle |
black |
brown (red) |
| EeBbdd |
grey bicolor, tricolor, or dilute blue merle |
black |
clear red, brown (red) |
| eeBBdd |
dilute clear red, red & white or red merle |
black |
black |
| eeBbdd |
dilute clear red, red & white or red merle |
black |
black and brown (red) |
| eebbdd |
dilute clear red, red & white or red merle |
brown |
brown (red) |
| EEbbdd |
dilute brown (red), bicolor, tricolor or merle |
brown |
- |
| Eebbdd |
dilute brown (red), bicolor, tricolor or merle |
brown |
clear red |
SAMPLES:
Two types of samples can be submitted for this DNA test:
- A blood sample in a lavender (EDTA) tube;
- Cheek swabs
- Order a Sample Collection Kit!
PRICE:
- $105.00 *;
Special contract prices are available for Breeder Clubs. Please contact us for more information.
* - subject to the applicable taxes (5% GST Canadian Residents only)
TEST RESULTS:
Test results are usually available in 10 business days from the moment the samples arrive at the laboratory. Test results can be reported by e-mail, fax, or by phone.
CERTIFICATION OF RESULTS:
HealthGene will provide a certificate for each test result.
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