Blue Eyes Directory · blueeyesdirectory.com Record mar-27, printed 14 September 2026. Every animal on this sheet has its own page and its own source at that address.
Girl 2, mating 7
Exotic Shorthair cross · line: Marusya · no blue eye. Carrier status not known · Variant known, this cat untested
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; and no recorded parent at all, which is a gap in the sources and not a statement that the cat had none.
No parent is recorded for this cat in the register, so no genealogy can be drawn. That is a gap in the sources, not a statement that the cat had none. Any offspring the register holds are listed below.
The record
Register id
mar-27
Sex
female
Position label
Girl 2, mating 7
Breed, as stated
Exotic Shorthair cross
Line
Marusya
Eye status
not-blue: no blue eye. Carrier status not known
Eyes, in the source's words
both brown
Role
offspring
Relations named by the source
F2 of the full-sibling mating
Litter key
cyrridwen-m7
Country
Russia
The description held
brown patched tabby and white 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
Evidence grade
Line-traced descent from a named founder is stated by the source
Blue Eyes Directory, blueeyesdirectory.com. Record mar-27. This sheet is a snapshot of a register that grows: check the address above for the current version, and for the sources behind every animal named on it.
Source
the Cyrridwen chart; unnamed on it; and Abitbol M, 'CORIN and DBE variants in cats: what we know and what remains to be explored', World Cat Federation, 2026. A presentation and not a published paper
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.