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Neapolitan Mastiff

Neapolitan Mastiff genetic profile from the CanVAS Atlas. 12 dogs in the Atlas, heterozygosity 0.33. Nearest relatives, trait loci frequencies, cohort distribution.

What the atlas says about Neapolitan Mastiff

In the atlas, the Neapolitan Mastiff clusters consistently as Neapolitan Mastiff (100% of the 12 dogs here). Genetic diversity is high (mean heterozygosity 0.3294), reflecting either a mixed-breed cluster or breeds with broad genetic backgrounds. At the trait loci, LCORL runs lower than average (0% here vs 83%); KRT71 runs lower than average (21% here vs 91%). Dogs here sit in a relatively sparse region of the atlas, fewer close neighbors than typical.

Mean heterozygosity is 0.329, notably high, indicates broad genetic background. Only 12 dogs of this breed in the atlas, modestly sampled.

Closest genetic neighbors in the atlas: Cane Corso, Saint Bernard, Mastiff, Newfoundland, and Great Dane.

Genetic dimensions · CanVAS atlas

What the genome says about Neapolitan Mastiff

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

Dogs in the Atlas
12Founders
6 from Spatola, 6 from Hayward2016
Genetic diversity
0.33Moderate
Mean heterozygosity across the breed. Too few dogs in this breed (<20) to rank.
Cluster structure
Single tight cluster
Intra-breed RMS distance: 23.56
Nearest genetic relatives
  1. Cane Corso4.10
  2. Saint Bernard8.09
  3. Mastiff9.06
  4. Newfoundland9.35
  5. Great Dane9.47
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
IGF155%
HMGA283%
SMAD283%
LCORL0%
STC244%
ADAMTS1755%
Leg length
FGF4·CFA18100%
FGF4·CFA1283%
Coat
RSPO256%
FGF550%
KRT7121%
MC1R79%
Ear set
MSRB3100%
Skull shape
BMP3100%
SMOC267%
Add your Neapolitan Mastiff to the Atlas

You can add your Neapolitan 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