Arisha Cyrridwen*RU

prefix Cyrridwen · British · line: Marusya · one blue eye, put down to a DBE variant or its line · 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 is flagged on this tree

1. BESSY. Eye and coat, a determination and not a query. This cat is blue-eyed in both eyes, carries a bicolour or locket white code, is not dominant white and is not colourpointed. The classic white spotting gene covers an eye where the white happens to fall, which gives an odd eye and not two blue ones, so the coat does not account for this and a dominant blue eye is present in the line. It is not the KIT odd-eye case. Its registry has entered no dominant eye code on it. Which variant is not deducible from a coat code and none is adopted.

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

cyr-01

Sex

not stated by the source

Cattery prefix

Cyrridwen

Breed, as stated

British

Line

Marusya

Eye status

odd-variant: one blue eye, put down to a DBE variant or its line

Eyes, in the source's words

odd

Certificate wording

British, (unrecognized) chocolate golden shaded odd eyed

Role

offspring

Relations named by the source

Opium Gold Gloria x Bessy

Country

Russia

Year

born 12 March 2023

EMS code

BRI xby 11 63

The code read out

British; shaded; odd eyes; Not recognised by this survey: xby

The description held

microchip number withheld. The x marks the colour unrecognised 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: Opium Gold Gloria, Bessy

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.