Turnaround time
10 workdays
48.4
40
DNA panel for six MC1R/E-locus variants that help explain red/yellow/cream, melanistic mask, grizzle/domino and sable coat patterns in dogs.
Overview
This DNA panel analyses six variants in the MC1R gene, also known as the Extension gene or E locus. The panel includes e1 c.916C>T, e2 c.-432G>C, e3 c.816_817del, Em c.790A>G, Eg c.233G>T and eH c.250G>A. Together, these markers provide insight into recessive red/yellow/cream, melanistic mask, grizzle/domino and sable-like coat patterns.
MC1R influences the switch between eumelanin (black/brown pigment) and phaeomelanin (red/yellow pigment). A functional E allele allows dark pigment formation, while two recessive e alleles strongly limit dark pigment in the coat. The dog may therefore appear red, yellow, cream, apricot or whitish depending on breed and other colour genes.
The E locus works with the A locus, K locus, B locus, D locus, white spotting and intensity genes. This panel is especially useful as part of a broader coat-colour interpretation.
The recessive e variants e1, e2 and e3 mainly cause a light red/yellow/cream spectrum when two recessive e alleles are present. Other E-locus alleles mainly influence where dark pigment is visible.
This test helps breeders and owners understand both visible and hidden E-locus alleles. That is useful for colour planning, explaining unexpected puppy colours and combining E-locus information with other coat-colour tests.
Included subanalyses
This analysis includes the following subanalyses:
Allele combinations & result interpretations
Below, for each tested locus, you will find the possible allele combinations that may be reported within this analysis, together with a brief explanation of their genetic meaning. The interpretation of possible interactions between different loci is included in the report, but is not shown here in full because that would lead to too many combinations on this page. The final expression may also depend on other genes and their interaction.
Genotype / allele combination: No e1 (C/C)
The tested e1 variant was not detected. This dog will not pass on this specific E-locus allele.
Genotype / allele combination: e1 present (C/T)
The dog carries one copy of e1. This does not by itself cause recessive recessive red/yellow, but it is important because it can combine with a second recessive e allele in offspring.
Genotype / allele combination: e1/e1 (T/T)
The dog has two copies of e1. For this marker, this causes the recessive recessive red/yellow direction; other coat-colour genes can still influence the final shade.
Genotype / allele combination: No e2 (G/G)
The tested e2 variant was not detected. This dog will not pass on this specific E-locus allele.
Genotype / allele combination: e2 present (G/C)
The dog carries one copy of e2. This does not by itself cause recessive cream/light red-yellow, but it is important because it can combine with a second recessive e allele in offspring.
Genotype / allele combination: e2/e2 (C/C)
The dog has two copies of e2. For this marker, this causes the recessive cream/light red-yellow direction; other coat-colour genes can still influence the final shade.
Genotype / allele combination: No e3 (N/N)
The tested e3 variant was not detected. This dog will not pass on this specific E-locus allele.
Genotype / allele combination: e3 present (N/del)
The dog carries one copy of e3. This does not by itself cause recessive pale yellow/white, but it is important because it can combine with a second recessive e allele in offspring.
Genotype / allele combination: e3/e3 (del/del)
The dog has two copies of e3. For this marker, this causes the recessive pale yellow/white direction; other coat-colour genes can still influence the final shade.
Genotype / allele combination: No Em (A/A)
The tested Em variant was not detected. This dog will not pass on this specific E-locus allele.
Genotype / allele combination: Em present (A/G)
The dog carries one copy of Em. This allele can cause melanistic mask when the other coat-colour genes make the pattern visible.
Genotype / allele combination: Em/Em (G/G)
The dog has two copies of Em. This strengthens the genetic presence of this E-locus allele and can pass melanistic mask clearly to offspring.
Genotype / allele combination: No Eg (G/G)
The tested Eg variant was not detected. This dog will not pass on this specific E-locus allele.
Genotype / allele combination: Eg present (G/T)
The dog carries one copy of Eg. This allele can cause grizzle/domino when the other coat-colour genes make the pattern visible.
Genotype / allele combination: Eg/Eg (T/T)
The dog has two copies of Eg. This strengthens the genetic presence of this E-locus allele and can pass grizzle/domino clearly to offspring.
Genotype / allele combination: No eH (G/G)
The tested eH variant was not detected. This dog will not pass on this specific E-locus allele.
Genotype / allele combination: eH present (G/A)
The dog carries one copy of eH. This allele can cause sable when the other coat-colour genes make the pattern visible.
Genotype / allele combination: eH/eH (A/A)
The dog has two copies of eH. This strengthens the genetic presence of this E-locus allele and can pass sable clearly to offspring.
Sampling and submission guidelines





References