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Mastiff

Mastiff genetic profile from the CanVAS Atlas. 32 dogs in the Atlas, heterozygosity 0.29. Nearest relatives, trait loci frequencies, cohort distribution.

What the atlas says about Mastiff

In the atlas, the Mastiff clusters consistently as Mastiff (100% of the 32 dogs here). At the trait loci, MC1R runs lower than average (3% here vs 62%); LCORL runs lower than average (38% here vs 83%). Dogs here sit in a relatively sparse region of the atlas, fewer close neighbors than typical.

Closest genetic neighbors in the atlas: Cane Corso, Neapolitan Mastiff, Boston Terrier, Staffordshire Bull Terrier, and French Bulldog.

Median lifespan is 9.0 years, about 1.9 years shorter than a typical dog of 76.25 kg, one of the larger gaps in the atlas.

Genetic dimensions · CanVAS atlas

What the genome says about Mastiff

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

Dogs in the Atlas
32Founders
22 from Hayward2016, 10 from Spatola
Genetic diversity
0.29Moderate
Mean heterozygosity across the breed. Ranks 35th most genetically tight of 107 ranked breeds.
Cluster structure
Splits into two genetic sub-populations
Intra-breed RMS distance: 27.27 · likely working/show-line, regional, or kennel lineage split.
Nearest genetic relatives
  1. Cane Corso7.02
  2. Neapolitan Mastiff9.06
  3. Boston Terrier9.24
  4. Staffordshire Bull Terrier11.17
  5. French Bulldog11.89
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
IGF121%
HMGA277%
SMAD281%
LCORL38%
STC248%
ADAMTS1784%
Leg length
FGF4·CFA1898%
FGF4·CFA1298%
Coat
RSPO291%
FGF531%
KRT7183%
MC1R3%
Ear set
MSRB396%
Skull shape
BMP385%
SMOC272%
Add your Mastiff to the Atlas

You can add your Mastiff 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