Cat Genome Testing: 362 Genomes, 45 Reported Variants

Whole-genome sequencing a cat now costs less than a dental cleaning, and the largest feline genome project has published 362 complete cat genomes. The consumer panel sitting in your cupboard reports 45 variants. That gap — between what research has sequenced and what a report actually tells you — is the entire story of cat genetic testing in 2026.

What 99 Lives has actually sequenced

The 99 Lives Cat Genome Sequencing Initiative, run from the University of Missouri, reads all 38 chromosomes of a cat rather than a fixed list of markers. When the consortium mapped the ticked-coat locus, its public dataset held 195 cats; by 2023 the same resource carried whole-genome data from 362 cats plus whole-exome data from another 52. Healthy cats are sequenced on purpose: you cannot call a variant "disease-causing" until you know how often it appears in cats that never develop the disease. Owners can nominate a cat for sequencing, and the data is deposited for any researcher to reanalyse. That openness is why feline genetics moves on a different timescale from dog genetics, where much of the testing market sits behind private databases.

150 known variants, 45 on a panel

A 2021 feline exome paper counted roughly 150 variants in domestic cats associated with more than 100 traits or diseases. A retail panel advertises 45+ health conditions and 25+ traits, plus blood type, for $99.99, with results in 2 to 3 weeks. A university laboratory will run one locus for $47 and take 15 business days. None of these products is a smaller version of the same thing; they answer different questions.

	Research dataset (99 Lives)	Retail panel	Single-locus lab test
What is read	Whole genome, all 38 chromosomes	Fixed set of known markers	One variant
Scale	362 genomes + 52 exomes	45+ conditions, 25+ traits, blood type	One condition per test
Price	Research contribution	$99.99 ($148.99 with parentage)	$47
Turnaround	Months	2–3 weeks	15 business days
Built for	Discovery	Owners and breeders	Confirming one locus

Where a cheek swab changes a decision

Polycystic kidney disease is the cleanest example. One PKD1 variant — a single base change on chromosome E3 — accounts for most feline cases, and it is dominant, so one copy is enough. In a 2026 analysis of 61,968 genetically tested cats and 110,325 insured cats in Japan, 77.8% of cats diagnosed with cystic kidneys carried that variant. Carrier frequency across 14 breeds fell 42.6% between 2019 and 2022, with drops of 49.5% in Scottish Folds, 38.8% in Persians and 57.7% in Ragamuffins — and no significant fall in British Shorthairs, Minuets or Munchkins, breeds where testing is less routine. That is what a DNA test looks like when it works: a measurable change in the population, not a certificate.

Pyruvate kinase deficiency behaves the other way. It is recessive, so carriers are healthy and only two carriers produce affected kittens, at the expected 25%. A survey of 14,179 cats across 38 breeds put the overall allele frequency at 6.31%, with 12.6% in Abyssinians and 6.4% in Maine Coons. A carrier result is a mating instruction, not a diagnosis.

Variant	Gene	Inheritance	Known frequency	What a positive result changes
PKD	PKD1	Dominant	Fell 42.6% in 14 breeds, 2019–2022	Do not breed; scan kidneys from 10 months
HCM, Maine Coon	MYBPC3 A31P	Dominant, incomplete	41.5% of 2,744 European Maine Coons	Avoid two-carrier matings; echo still required
HCM, Ragdoll	MYBPC3 R820W	Dominant, incomplete	Breed-specific, generally low	Same as above
PK deficiency	PKLR	Recessive	12.6% allele frequency, Abyssinian	Never pair two carriers

Where the same swab misleads

The Maine Coon HCM variant is where owners most often over-read a result. In 2,744 European Maine Coons, 41.5% carried A31P, and carriers had a relative risk of 9.91 for HCM — but only 12 of 164 echocardiography cats actually had the disease. Penetrance in heterozygotes was estimated at 0.08, against 0.58 in homozygotes. A 282-cat Danish cohort sharpened it: 80% of A31P homozygotes (20 of 25) developed HCM and 48% died of cardiac causes, while two of 109 wild-type cats were also affected. A negative A31P result therefore rules out one variant, not the disease. HCM affects roughly 1 in 7 cats, and only an echocardiogram measures wall thickness.

The breed report is a similarity score

Most cats are not purebred, and no cat panel reconstructs a pedigree. It compares your cat's markers with reference populations and returns a percentage similarity. That number is harmless entertainment and has no clinical weight. Paying for a breed report and then treating it as a disease-risk forecast is the most common way owners waste the $99.

Three situations where testing pays

Planning a litter. Test both parents for the variants the breed actually carries, not the whole catalogue. Carriers can stay in a programme: the Japanese PKD1 data shows a 42.6% fall in five years without a rise in inbreeding. The details are in the pre-breeding test list.
An adopted kitten with no history. Blood type plus PKLR, and PKD1 if there is any Persian lineage, costs $47 to $150. A mismatched first transfusion is far more expensive. See cat blood types.
A senior cat with a murmur. Skip the panel. Book the echo, which runs $200 to $500, and read why a stethoscope is not enough.

What sequencing still cannot answer

Diabetes, asthma, obesity, hip dysplasia and most HCM are polygenic or unexplained. A 362-genome dataset is a rounding error beside human biobanks holding half a million samples, and a variant found in one cat is a hypothesis, not a test. Consumer whole-genome products advertised at $400 and up mostly sell reanalysis and updates rather than a file you can hand to a geneticist. Ask two questions before buying: do I get the raw data, and is reanalysis included when new variants are published?

This is not a diagnosis

This article does not replace veterinary diagnosis. Genetic results are interpreted alongside breed, age, echocardiography, ultrasound and bloodwork; a laboratory report should be read by a veterinarian who knows the cat.

Terms mentioned in this article

HCM PKD1 PKD

Frequently asked

Does a cat DNA test replace an echocardiogram?

No. Only a couple of HCM variants can be tested, and the best-studied one, MYBPC3 A31P in Maine Coons, has an estimated penetrance of 0.08 in heterozygotes against 0.58 in homozygotes. Two of 109 wild-type cats in a Danish cohort also developed HCM. Wall thickness has to be measured by ultrasound, which is why a negative DNA result never rules out the disease.

How much does cat genetic testing cost, and how long does it take?

A single locus at a university laboratory costs about $47 and takes 15 business days. A retail panel covering 45+ conditions and blood type runs $99.99, or $148.99 with parentage, with results in 2 to 3 weeks. Consumer whole-genome products start around $400. The 99 Lives project accepts nominated cats for research sequencing, but it is not a diagnostic service.

My cat tested positive for the PKD1 variant. What now?

PKD is dominant, so one copy is enough, and the variant was found in 77.8% of cats diagnosed with cystic kidneys in a 2026 Japanese dataset. Do not breed the cat, and start kidney ultrasound at about 10 months, then yearly, because cysts enlarge with age. Many affected cats keep normal kidney values for years, so the result changes monitoring and breeding plans rather than predicting a date.