Cyrridwen Morkovka

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

Genealogy trace, one printable page carrying the proposed code

Under the variant field this directory proposes, this cat would read DBE 161p. A carrier of a variant with no published allele, on no named line. This is the group bare 161 exists for. The proposal is set out in full here, and no registry issues this field today: it is computed from the record at each build and is not part of any registration.

How this cat is connected to the trait

No recorded parent link joins this cat to a founder or to a tested animal. What the record rests on instead is the line recorded on it, Marusya, which is a source's attribution and not a descent this register can walk.

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

One of an obligate pair. Paired with Cyrridwen Vasya, for 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.

The record

Register id

mar-33

Sex

not stated by the source

Cattery prefix

Cyrridwen

Breed, as stated

Exotic Shorthair

Line

Marusya

Eye status

unknown: the source records no eye colour

Role

other

EMS code

EXO d 22

The code read out

Exotic Shorthair; red; blotched 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

Line-traced descent from a named founder is stated by the source

In the register

• Parents: Sweet Spices Tolstoi of Cyrridwen, White Seaexo E'Tain of Cyrridwen
• Offspring recorded in this register; a cat may have others: Cyrridwen Caesar

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.