Finnish Spitz
22 Finnish Spitzs in the atlas. Every number on this page has a source.
22 Finnish Spitzs in the Sniff Atlas. Population-genetic snapshot, Mendelian carrier frequencies from Donner 2023, and the data substrate's release version, sample sizes, and evidence tier on every claim.
In the atlas, the Finnish Spitz clusters consistently as Finnish Spitz (100% of the 22 dogs here). At the trait loci, HMGA2 runs lower than average (16% here vs 56%); FGF5 runs lower than average (32% here vs 64%). Dogs here sit in a relatively sparse region of the atlas, fewer close neighbors than typical.
Ranks 22 of 107 on the bottleneck severity scale, well into the upper quartile of population contraction. Low breed predictability score (0.26), individual dogs of this breed vary widely in genetics, suggesting active substructure or sub-population diversity. Only 22 dogs of this breed in the atlas, modestly sampled.
Closest genetic neighbors in the atlas: Kuvasz, American Eskimo Dog, village dog Nz South, Peruvian Inca Orchid, and Chinese Crested.
Median lifespan is 11.2 years, slightly shorter than expected for the breed size (10.82 kg).
What the genome says about Finnish Spitz
Computed from the 18,477 research dogs in the Atlas.
- Kuvasz7.12
- American Eskimo Dog8.08
- Village Dog Nz South8.90
- Peruvian Inca Orchid9.49
- Chinese Crested10.22
Frequency of the alternate allele in this breed at each locus's representative SNP.
| IGF1 | 55% |
| HMGA2 | 16% |
| SMAD2 | 100% |
| LCORL | 100% |
| STC2 | 55% |
| ADAMTS17 | 50% |
| FGF4·CFA18 | 66% |
| FGF4·CFA12 | 96% |
| RSPO2 | 46% |
| FGF5 | 32% |
| KRT71 | 61% |
| MC1R | 86% |
| MSRB3 | 55% |
| BMP3 | 55% |
| SMOC2 | 89% |
What does the genome say about how a Finnish Spitz looks?
Finnish Spitzs look the way they do because of a small set of fixed and near-fixed morphology genes that, taken together, define the visible breed. Each translation below pairs the gene with the trait an owner actually sees, the breed's allele frequency at that locus, and a one-clause causal phrase.
Size and build
IGF1 sits at 55% for the small-body allele. IGF1 is the gene that sets dog body size from Chihuahua to Great Dane. Intermediate frequencies typically keep a breed in the mid-sized range rather than tipping toward the larger working forms.
HMGA2 is at 16%, leaving most of the size signal to other loci in the panel.
SMAD2 is near-fixed at 100%, a chromosome-7 height locus differentiating small from giant breeds.
LCORL is near-fixed at 100%, the NCAPG/LCORL height locus that is one of the strongest single contributors to canine body size.
STC2 sits at 55%.
ADAMTS17 sits at 50%. ADAMTS17 is a body-size locus also linked to lens disorders.
Leg length
The FGF4 retrogene on chromosome 18 sits at 66%. This is the leg-length variant. The intermediate frequency means some dogs in this breed carry the short-legged allele and some do not.
The FGF4 retrogene on chromosome 12 is near-fixed at 96%, the chondrodystrophic variant associated with intervertebral disc disease risk in breeds that carry it.
Coat type, length, and color
RSPO2 sits at 46% for the furnishings variant. Furnishings (the eyebrow-and-mustache pattern seen in Schnauzers and Wheaten Terriers) vary across the population at this intermediate frequency, and visible expression depends on the specific allele combination each dog carries.
FGF5 sits at 32% for the long-coat variant. Coat length is influenced by other loci as well, so intermediate FGF5 frequencies do not always correspond to intermediate visible coat lengths.
KRT71 sits at 61% for the wavy/curly variant. Coat curl varies across individuals at this intermediate frequency, and visible expression is also influenced by modifier loci.
MC1R is at 86% at the representative SNP. MC1R controls the switch between red-to-gold and black-to-brown pigment, with the e/e homozygous genotype producing the gold-to-red spectrum by blocking eumelanin (black and brown pigment).
Ears
MSRB3 sits at 55% for the drop-ear allele, which is why ear set varies across the breed.
Skull shape
BMP3 sits at 55%, contributing to the breed's moderate, mesaticephalic head shape rather than the extreme brachycephalic form.
SMOC2 is at 89%, the major locus contributing to the breed's brachycephalic face shape.
Where every number on this page came from.
This page draws on three primary data sources. Carrier 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 now in the structured data for every variant the panel covers. Mondo, OMIM, Ensembl, and HGNC cross-references on gene pages remain pending — they arrive in December 2026 alongside the imputed 9.67M-variant CanVAS dataset via the OMIA SQL dump absorption. Until then, gene IDs carry NCBI Gene and OMIA phene URLs only; the wider human-homolog and disease-ontology cross-reference set fills in with that release.
How to cite this page. The computed dimensions on this page are derived from the open Sniff Atlas v1.0.1 (Gehring 2026, doi:10.5281/zenodo.20566358, CC-BY 4.0). Full citation formats including BibTeX, RIS, and CITATION.cff at sniff.world/cite.
We have 22 finnish spitzs. We do not have yours.
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- Donner J, Anderson H, Davison S, et al. (2023). Frequency and distribution of 152 genetic disease variants in over 1,000,000 mixed-breed and purebred dogs. PLOS Genetics 19(2):e1010651. doi:10.1371/journal.pgen.1010651
- Brundage J, et al. (2026). CanVAS: a harmonized 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).