Irish Terrier
Irish Terriers have a cited life expectancy of 13.5 years (McMillan 2024 / VetCompass, n=535, 95% CI 13.1 to 14). The tested variant with the highest allele frequency is Degenerative Myelopathy, at 8.6% among the 35 Irish Terriers tested (Donner 2023; gene copies, not dogs), then Acral Mutilation Syndrome (2.9%). Only 8 dogs stand behind the atlas figures here, so little is known yet.
Also known as Irish Red Terrier.
Which disease variants turn up in Irish Terriers?
From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), 3 turn up in Irish Terriers at observable frequency. The figure beside each is its allele frequency. Of the gene copies tested in this breed, the share that carry the variant. Every dog carries two copies, so this is not the share of dogs. It is not clinical risk. Most recessive variants require two copies for disease expression; many dominant variants show incomplete penetrance. Read this as a population fingerprint of what's in the gene pool, not a per-dog prediction.
SOD1what this gene does
SOD1 is a gene that helps protect cells from damage caused by harmful molecules called free radicals.
For your dog: If your dog is a carrier of SOD1 variants, it's worth discussing with your vet, but remember carrier status doesn't mean your dog will get the disease.
PDK4what this gene does
PDK4 helps regulate how cells use energy, especially in the heart muscle.
For your dog: If your dog is one of the breeds known to carry this gene, it’s worth discussing heart health with your vet, but being a carrier doesn’t mean your dog will develop disease.
GDNFwhat this gene does
GDNF is a gene that helps support nerve cells, especially those involved in sensing pain and movement.
For your dog: If your dog is from a breed that can carry this gene change, it’s worth asking your vet about testing to understand any potential risks.
What these results mean for a Irish Terrier
About 9 in every 100 copies of this gene in the 35 Irish Terriers tested carry this change (Donner 2023).
- DM slowly damages the spinal cord in adult dogs, until the back legs stop working. Nothing yet can stop it.
OMIA 000263-9615
“This is an adult onset degeneration of the spinal cord that progresses to paraplegia and tetraparesis. There is no successful treatment. A genetic test is available.” OMIA 000263-9615
- Two copies of the SOD1 gene change mean a dog is at risk, not that it will get sick. Some dogs with two copies never do.
OMIA 000263-9615
“some homozygous mutant dogs had no signs of degenerative myelopathy, which suggests incomplete penetrance or other causative loci” OMIA 000263-9615
- One copy makes a dog a carrier. In the study that found this change, every dog with DM that was tested had two copies.
OMIA 000263-9615
“All affected dogs tested were homozygous mutant.” OMIA 000263-9615
What to do
A DNA result isn't a diagnosis. If the way your dog walks changes, take that and the result to your vet.
Not tested, or a mix
Without a test, no one can tell how many copies your dog has. How common it is in a breed says nothing about one dog.
A heart (DCM) test that doesn't hold up
Not a reliable testAbout 3 in every 100 copies of this gene in the 35 Irish Terriers tested carry this change (Donner 2023).
- This gene change was linked to a heart disease called DCM in Dobermans, but it hasn't been shown to cause it. The curated record says a test for it isn't a good guide to heart risk, even in Dobermans.
OMIA 000162-9615
“it is evident that any DNA test based on this marker will not be a good indicator of liability to this disorder in Dobermans” OMIA 000162-9615
What to do
A result for this one isn't, by itself, a reason for heart tests. Whether to check your dog's heart is a conversation to have with your vet.
Not tested, or a mix
Outside the Doberman, no one has shown what this change means.
Other names
The Irish Terrier is also recorded as Irish Red Terrier.
Identified as Irish Terrier (VBO:0200704) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs FCI 139 · iDog 132 · VeNom 15008.
For researchers Population genetics, disease models and every recorded condition Open the research detail for the Irish Terrier
In the atlas, the Irish Terrier clusters consistently as Irish Terrier (100% of the 8 dogs here). Dogs here sit in a relatively sparse region of the atlas, fewer close neighbors than typical.
Only 8 dogs of this breed in the atlas: every individual contributes outsized weight to the breed's computed profile.
What the atlas genotypes say about Irish Terrier
Computed from the 14,478 CanVAS dogs in the Atlas, on an imputed genotype backbone: 77,215 directly typed sites per dog, imputed to 9.67 million variants.
The confidence below counts dogs, not reads: it is the size of the sample, and it is separate from how the genotypes were measured.
Not enough dogs in the atlas yet (n=8) for a reliable diversity figure. It fills in as more are added.
What does genetic diversity mean?
How varied a breed's gene pool is — the share of gene spots where a typical dog of the breed carries two different versions rather than two identical ones.
How to read it: Higher = more diverse. Among well-sampled breeds it ranges roughly 0.22 (least diverse) to 0.33 (most diverse).
Diversity is a strength, not a verdict on any individual dog. Lower diversity means it's worth paying attention to recessive-risk testing — not that a dog is doomed.
Not enough dogs in the atlas yet (n=8) to resolve cluster structure. It fills in as more are added.
What does within-breed variation mean?
How much individual dogs within the breed differ from each other genetically.
How to read it: Higher = more internal variety among individuals of the breed.
Sensitive to how many dogs of the breed we've sampled.
What does typical lifespan mean?
The median age dogs of the breed tend to reach.
How to read it: Higher = longer-lived. Compare to longevity-for-size to see whether it's just a size effect.
Drawn from population lifespan records; individual dogs vary widely with care, genetics, and luck.
Irish Terriers are a natural model for human disease
Because the same genes cause the same conditions across species, the inherited conditions documented in Irish Terriers help researchers understand, and work toward treating, the human diseases they model. This is the dog advancing human medicine. The breed models the human disease; it does not have it, and this is not a prediction for your dog.
- Duchenne muscular dystrophy, modeled by the breed's Muscular dystrophy, Duchenne type via DMD, the same underlying biology.
- OMIM:608245, modeled by the breed's Curly coat , the same underlying biology.
- Darier disease, modeled by the breed's Darier disease , the same underlying biology.
- OMIM:615886, modeled by the breed's Hyperkeratosis, palmoplantar, FAM83G-related , the same underlying biology.
- OMIM:602307, modeled by the breed's Muscular dystrophy , the same underlying biology.
Every condition recorded in the Irish Terrier
Beyond the testable carriers above, OMIA's literature catalogue records 7 genetic conditions in the Irish Terrier, 5 of which have a known human equivalent. This is the documented landscape across all Irish Terriers ever studied, not a prediction for any one dog.
- Muscular dystrophy, Duchenne type X-linked recessiveHuman equivalent: Duchenne muscular dystrophy
- Curly coat AutosomalHuman equivalent: OMIM:608245
- Darier disease Autosomal dominantHuman equivalent: Darier disease
- Hyperkeratosis, palmoplantar, FAM83G-related Autosomal recessiveHuman equivalent: OMIM:615886
- Human equivalent: OMIM:602307
Where every number on this page came from.
This page draws on three primary data sources. Allele frequencies for the Mendelian section come from Donner et al. 2023 (CC-BY-4.0). We grade these data at evidence Limited because the cohort is a direct-to-consumer ascertainment, which biases toward owners who chose to test their dogs. The panel also uses tag-SNP proxies for some variants rather than direct causal-variant assays. Limited is a study-design grade, not a quality grade: the Donner cohort is the largest open canine-genotype dataset in existence and we are grateful for it. We rate the confounding MEDIUM.
Population-genetic dimensions (heterozygosity, intra-breed PCA distance, nearest neighbors, trait-locus frequencies) come from CanVAS (Brundage 2026), harmonized through the Sniff Atlas. The exact release date and verification commit are pinned at the bottom of the page so a researcher can trace a number back to a specific snapshot. The disease-gene-variant graph comes from OMIA (Online Mendelian Inheritance in Animals; Nicholas, Tammen, and the Sydney Informatics Hub at the Sydney School of Veterinary Science, The University of Sydney; retrieved April 2026, DOI 10.25910/2AMR-PV70).
What this page does not yet have. Inheritance modes and per-disease penetrance evidence from Donner 2023 are in the structured data for every variant the panel covers. Mondo, OMIM, Ensembl, and HGNC cross-references live on the gene and disease pages this page links to, rather than being repeated here. What is still absent from this breed page is anything not in the cited panel, and each such gap carries its cause where it appears.
How to cite this page. The computed dimensions on this page are derived from the open Sniff Atlas v1.0.2 (Gehring 2026, doi:10.5281/zenodo.20566358, CC-BY 4.0). Full citation formats including BibTeX, RIS, and CITATION.cff at sniff.world/cite.
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- Donner J, Freyer J, Davison S, Anderson H, Blades M, Honkanen L, et al. (2023). Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651. doi:10.1371/journal.pgen.1010651
- Brundage DM (2026). CanVAS: A Harmonized and Imputed Canine Variant Atlas. bioRxiv. doi:10.64898/2026.04.13.718238
- Nicholas, F.W., Tammen, I., & Sydney Informatics Hub. (2026). Online Mendelian Inheritance in Animals (OMIA) [dataset]. The University of Sydney. https://omia.org. doi:10.25910/2AMR-PV70 (retrieved April 2026).