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Jack Russell Terrier

Jack Russell Terrier genetic profile from the CanVAS Atlas. 49 dogs in the Atlas, heterozygosity 0.37. Nearest relatives, trait loci frequencies, cohort distribution.

What the atlas says about Jack Russell Terrier

In the atlas, the Jack Russell Terrier clusters consistently as Jack Russell Terrier (100% of the 49 dogs here). Genetic diversity is high (mean heterozygosity 0.372), reflecting either a mixed-breed cluster or breeds with broad genetic backgrounds. At the trait loci, HMGA2 runs lower than average (0% here vs 56%); IGF1 runs higher than the atlas average (87% here vs 55%).

Ranks 100 of 107 on the bottleneck severity scale, among the most genetically diverse breeds in the atlas. Mean heterozygosity is 0.372, notably high, indicates broad genetic background.

Closest genetic neighbors in the atlas: Border Terrier, Rat Terrier, Australian Cattle Dog, Airedale Terrier, and Yorkshire Terrier.

Genetic dimensions · CanVAS atlas

What the genome says about Jack Russell Terrier

Computed from the 14,478 research dogs in the Atlas. Methods: technical methodology.

Dogs in the Atlas
49Founders
30 from Hayward2016, 10 from Spatola, 7 from Shannon
Genetic diversity
0.37Diverse
Mean heterozygosity across the breed. Ranks 100th most genetically tight of 107 ranked breeds.
Cluster structure
Splits into two genetic sub-populations
Intra-breed RMS distance: 30.51 · likely working/show-line, regional, or kennel lineage split.
Nearest genetic relatives
  1. Border Terrier4.52
  2. Rat Terrier9.80
  3. Australian Cattle Dog10.53
  4. Airedale Terrier10.90
  5. Yorkshire Terrier11.03
Top-10 PC corrected Euclidean. Lower = closer.
Trait genetics
Allele frequencies at named morphology loci

Frequency of the alternate allele in this breed at each locus's representative SNP. Methods + caveats in technical methodology.

Body size
IGF187%
HMGA20%
SMAD248%
LCORL100%
STC261%
ADAMTS1761%
Leg length
FGF4·CFA1869%
FGF4·CFA1285%
Coat
RSPO261%
FGF568%
KRT7182%
MC1R58%
Ear set
MSRB362%
Skull shape
BMP375%
SMOC281%
Add your Jack Russell Terrier to the Atlas

You can add your Jack Russell Terrier right now at /add/ as a Charted star. Or, if you'd rather wait for DNA uploads, leave your email and we'll let you know the moment those open.

Last updated
Sources: CanVAS (Brundage 2026) · CanVAS dimensions data