Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog
Abstract Background The Melanocortin 1 Receptor (MC1R) plays a central role in regulation of coat color determination in various species and is commonly referred to as the “E (extension) Locus”. Allelic variation of the MC1R gene is associated with coat color phenotypes E M (melanistic mask), E G (g...
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| Format: | Article |
| Language: | English |
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BMC
2020-11-01
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| Series: | Canine Medicine and Genetics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s40575-020-00095-7 |
| _version_ | 1818346112750190592 |
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| author | Heidi Anderson Leena Honkanen Päivi Ruotanen Julia Mathlin Jonas Donner |
| author_facet | Heidi Anderson Leena Honkanen Päivi Ruotanen Julia Mathlin Jonas Donner |
| author_sort | Heidi Anderson |
| collection | DOAJ |
| description | Abstract Background The Melanocortin 1 Receptor (MC1R) plays a central role in regulation of coat color determination in various species and is commonly referred to as the “E (extension) Locus”. Allelic variation of the MC1R gene is associated with coat color phenotypes E M (melanistic mask), E G (grizzle/domino) and e 1–3 (recessive red) in dogs. In addition, a previous study of archeological dog specimens over 10,000 years of age identified a variant p.R301C in the MC1R gene that may have influenced coat color of early dogs. Results Commercial genotyping of 11,750 dog samples showed the R301C variant of the MC1R gene was present in 35 breeds or breed varieties, at an allele frequency of 1.5% in the tested population. We detected no linkage disequilibrium between R301C and other tested alleles of the E locus. Based on current convention we propose that R301C should be considered a novel allele of the E locus, which we have termed e A for “e ancient red”. Phenotype analysis of owner-provided dog pictures reveals that the e A allele has an impact on coat color and is recessive to wild type E and dominant to the e alleles. In dominant black (K B /*) dogs it can prevent the phenotypic expression of the K locus, and the expressed coat color is solely determined by the A locus. In the absence of dominant black, e A /e A and e A /e genotypes result in the coat color patterns referred to in their respective breed communities as domino in Alaskan Malamute and other Spitz breeds, grizzle in Chihuahua, and pied in Beagle. Conclusions This study demonstrates a large genotype screening effort to identify the frequency and distribution of the MC1R R301C variant, one of the earliest mutations captured by canine domestication, and citizen science empowered characterization of its impact on coat color. |
| first_indexed | 2024-12-13T17:13:06Z |
| format | Article |
| id | doaj.art-23e24fab3c8e46f98ba8931e5c3c22bb |
| institution | Directory Open Access Journal |
| issn | 2662-9380 |
| language | English |
| last_indexed | 2024-12-13T17:13:06Z |
| publishDate | 2020-11-01 |
| publisher | BMC |
| record_format | Article |
| series | Canine Medicine and Genetics |
| spelling | doaj.art-23e24fab3c8e46f98ba8931e5c3c22bb2022-12-21T23:37:29ZengBMCCanine Medicine and Genetics2662-93802020-11-017111110.1186/s40575-020-00095-7Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dogHeidi Anderson0Leena Honkanen1Päivi Ruotanen2Julia Mathlin3Jonas Donner4Wisdom HealthWisdom HealthWisdom HealthWisdom HealthWisdom HealthAbstract Background The Melanocortin 1 Receptor (MC1R) plays a central role in regulation of coat color determination in various species and is commonly referred to as the “E (extension) Locus”. Allelic variation of the MC1R gene is associated with coat color phenotypes E M (melanistic mask), E G (grizzle/domino) and e 1–3 (recessive red) in dogs. In addition, a previous study of archeological dog specimens over 10,000 years of age identified a variant p.R301C in the MC1R gene that may have influenced coat color of early dogs. Results Commercial genotyping of 11,750 dog samples showed the R301C variant of the MC1R gene was present in 35 breeds or breed varieties, at an allele frequency of 1.5% in the tested population. We detected no linkage disequilibrium between R301C and other tested alleles of the E locus. Based on current convention we propose that R301C should be considered a novel allele of the E locus, which we have termed e A for “e ancient red”. Phenotype analysis of owner-provided dog pictures reveals that the e A allele has an impact on coat color and is recessive to wild type E and dominant to the e alleles. In dominant black (K B /*) dogs it can prevent the phenotypic expression of the K locus, and the expressed coat color is solely determined by the A locus. In the absence of dominant black, e A /e A and e A /e genotypes result in the coat color patterns referred to in their respective breed communities as domino in Alaskan Malamute and other Spitz breeds, grizzle in Chihuahua, and pied in Beagle. Conclusions This study demonstrates a large genotype screening effort to identify the frequency and distribution of the MC1R R301C variant, one of the earliest mutations captured by canine domestication, and citizen science empowered characterization of its impact on coat color.http://link.springer.com/article/10.1186/s40575-020-00095-7AncientCanineDogCoat colorDominoGrizzle |
| spellingShingle | Heidi Anderson Leena Honkanen Päivi Ruotanen Julia Mathlin Jonas Donner Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog Canine Medicine and Genetics Ancient Canine Dog Coat color Domino Grizzle |
| title | Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog |
| title_full | Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog |
| title_fullStr | Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog |
| title_full_unstemmed | Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog |
| title_short | Comprehensive genetic testing combined with citizen science reveals a recently characterized ancient MC1R mutation associated with partial recessive red phenotypes in dog |
| title_sort | comprehensive genetic testing combined with citizen science reveals a recently characterized ancient mc1r mutation associated with partial recessive red phenotypes in dog |
| topic | Ancient Canine Dog Coat color Domino Grizzle |
| url | http://link.springer.com/article/10.1186/s40575-020-00095-7 |
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