Cyrridwen Alex

prefix Cyrridwen · Exotic · 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 Alex, EXO d 03
2. Mio Piccolo Greg of Cyrridwen, EXO n 03, the parent of Cyrridwen Alex. a founder of this survey; no variant has ever been identified in this line

That is one recorded parent link, and the animal at the end of it has never been tested, so the connection is a descent and not a result. 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.

The record

Register id

mar-51

Sex

male

Cattery prefix

Cyrridwen

Breed, as stated

Exotic

Line

Marusya

Eye status

unknown: the source records no eye colour

Role

ancestor

Relations named by the source

sire of Cyrridwen Vasya

EMS code

EXO d 03

The code read out

Exotic Shorthair; red; bicolour

The description held

entered from the Jasmin of Golden Esperanza certificate. 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

Reported asserted, with neither a test nor a traced descent

In the register

• Parents: Mio Piccolo Greg of Cyrridwen, Cyrridwen Anabel
• 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.