Cyrridwen Mishka

prefix Cyrridwen · Exotic Shorthair · DBE-MARU · line: Marusya · the source records no eye colour · Variant known, this cat untested

Genealogy trace, one printable page carrying the proposed code

How this cat is connected to the trait

1. Cyrridwen Mishka, EXO n 03 23
2. Marusja DBE, the parent of Cyrridwen Mishka. genotyped DBE-MARU; a founder of this survey

That is one recorded parent link, and the animal at the end of it has a laboratory result, so what this cat could carry is not a guess about a line but a consequence of a test on a relative. Every step is a parent recorded in this register from a document; none of them is an assumption. The full genealogy is drawn below, and the sources for each animal are on its own page.

Save this cat as a PDF the connection, the genealogy and the source on one A4 landscape sheet, carrying this directory's name and address

What it would be carrying

DBE-MARU. Exactly one variant below this cat is fixed by a DNA genotype or by a first-degree lineage genotype, through Jasmin of Golden Esperanza, Cyrridwen Caesar, and the name travels back up the path the deduction came down. This names the variant and does not upgrade the carriage: what changed is which test to order.

What the pedigree implies

On the path above an obligate pair. Above Cyrridwen Caesar

This is computed from the recorded parentage each time this site is built and is not typed into the register. It is a deduction from the trait being dominant, not a statement by any source, and it is not the same thing as the record's own status field. Only a laboratory settles it for an individual. The full list is on latent lines.

What is flagged on this tree

1. MARUSJA DBE. Breed confirmed by the researcher, and the certificate is wrong. The WCF Astra certificate RU 0184/H-0133-2965-24 riex prints this animal in its Great-Great-grandparent column as marusya, EXO n 03 24, which would make the founder of the line an Exotic Shorthair. Professor Marie abitbol states that she is a domestic shorthair and not an exotic, in correspondence of 2 September 2026, and this register already held her as a domestic shorthair and as not a pedigree cat. The register and the researcher agree and the certificate is the odd one out: its reading is recorded here and is not adopted, because a breed written into a descendant's pedigree four generations up is the club transcribing what it was told rather than a registration of the animal itself. Why the line's records are thin. The same correspondence states that the breeder carried out many crossings on to Exotic Shorthair, Persian and British Shorthair backgrounds, produced many of this animal's offspring, and that the pedigree data were not always recorded. That is the reason this line is held largely without parent links and it is the breeder's own account, not an inference. Two photographs of her are held on the messybeast archive and the breeder supplied further pictures to the researcher; none is in this register. S_ABITBOL_224. Three photographs of her are now held, confirmed as this animal by the compiler on 2 September 2026, and the founder has a face on this register for the first time: a still captioned Marusya from the researcher's own presentation slide, a close-up in which both blue eyes are plain, and one of her nursing a litter. The close-up is the one published, credited to the breeder's own public post, which is where she carries it. They are photographs and not evidence of a determinant. S_MARUSYA_PHOTO_226. Phenotype proposal on the founder, and it is a proposal and nothing more. The compiler, on reading the three photographs of this animal on 2 September 2026, records that she carries the look of both the DBE-ALT and the Igor lines. That is a statement about appearance and it is not a genotype, not a pedigree and not an attribution this register adopts. It is held in the claimed field, which is never walked, so nothing descends from it and no count anywhere on this site moves because of it. Why it is worth recording anyway: if the founder of a line held as its own unnamed variant looks like two named ones, then whether these are separate determinants at all is a real question, and Professor Abitbol's own position is that every published dominant blue eye variant so far lies in PAX3. The only thing that would settle it is a genotype, and no animal of this line has one. S_MARUSYA_PHENO_227 | the variant is named and she is the cat it is named for, 12 September 2026. Abitbol M, Eisele T and Lipovenko E, 'Additional PAX3 Variants for Dominant Blue Eyes in Cats', Animal Genetics 2026;57:e70199, doi:10.1002/age.70199, open access, read 12 September 2026 names the allele DBE-MARU, Marusya Dominant Blue Eyes, PAX3 XM_019838731.3:c.784C>T, a nonsense variant in the fifth exon, predicted to truncate the protein at p.(Arg262*) and so to remove 46 per cent of it. She is recorded heterozygous. All 14 DBE cats of the line were heterozygous, the one non-DBE cat of the family was wild-type, and the allele was absent from the 99 Lives dataset of 348 cats and from every DBE cat of every other line tested. The proposal that she shows DBE-ALT and the Igor line together is withdrawn by this result and is no longer carried in any field. It was a reading of her appearance and never a test, it was held in the claimed field and never walked, and a published genotype now replaces it. One homozygote is recorded and it was an abnormal kitten, Dead at birth, out of two DBE parents. The paper states that no data is available on the hearing status of any DBE cat in this line. S_PAX3_2026_234 | where this variant sits in PAX3. A third party compilation places DBE-MARU at EXON 5, a coding variant. The register records the position and does not adopt it as its own finding: a schematic on a website is not a paper, and where this register needs the science it cites the papers directly. It is recorded because it is checkable, and because the position in the gene is the one thing about these variants that a breeder can never observe and a laboratory never reports on a result sheet. S_LOCI_272

A flag is not an error. It marks a place where two sources say different things, or where an attribution cannot be made on the evidence held.

The record

Register id

mar-34

Sex

not stated by the source

Cattery prefix

Cyrridwen

Breed, as stated

Exotic Shorthair

Line

Marusya

Variant

DBE-MARU

Eye status

unknown: the source records no eye colour

Role

other

Relations named by the source

the Mishka of the Cyrridwen chart, here with a registration number

EMS code

EXO n 03 23

The code read out

Exotic Shorthair; black; bicolour, mackerel tabby

The description held

The variant of this line is DBE-Maru and two copies of it are not survivable on the evidence held. The allele is PAX3 XM_019838731.3:c.784C>T, a nonsense variant in the fifth exon that truncates the protein at p.(Arg262*) and removes 46 per cent of it. All 14 dominant blue eyed cats of the line tested are heterozygous. One homozygote is on record and it was an abnormal kitten, Dead at birth, out of two dominant blue eyed parents, genotyped T/T. It is recorded against every animal of the line because a breeder looks up an animal and not a line. What it means in practice: mating two carriers together is expected to lose the quarter of the litter that inherits two copies, and because those kittens do not survive to be counted, a breeder doing it may see only small litters and conclude nothing is wrong. It is a different and worse harm from the compound heterozygote this register documents elsewhere, which is white and deaf and which lives. No hearing data exists for any cat of this line, which the authors state explicitly, so nothing is said here about deafness in it either way. Source: Abitbol M, Eisele T and Lipovenko E, 'Additional PAX3 Variants for Dominant Blue Eyes in Cats', Animal Genetics 2026;57:e70199. S_PAX3_2026_236

Note

The code and the description do not use the same words for this coat. Both are recorded and neither is reconciled to the other.

Evidence grade

Lineage genotyped not tested. The variant is fixed by a DNA genotype in a parent or an offspring, and only one variant sits in the ancestry, so which variant this animal carries is settled without a sample of its own

In the register

• Parents: Mio Piccolo Greg of Cyrridwen, Marusja DBE
• Offspring recorded in this register; a cat may have others: Cyrridwen Vasya

This directory is a working aid compiled from published charts, registry documents and breeder statements. It is not a register and it has no standing of any kind. The grade attaches to the animal, not to the line: a cat whose ancestor was genotyped is line-traced, not genotyped.