Blue Eyes Directory · blueeyesdirectory.com Record sbc-91, printed 14 September 2026. Every animal on this sheet has its own page and its own source at that address.
Yalta Great Joy
prefix Great Joy · Siberian · line: Siberian, Altai or Barnaul unconfirmed · both eyes blue, put down to a DBE variant or its line · Variant not known
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, Siberian, Altai or Barnaul unconfirmed, which is a source's attribution and not a descent this register can walk.
Bar on top is the grade:GenotypedWild typeLine-tracedReported♂ male ♀ femaleblue
not blue
no eye colour recordeda photograph is held⚑ a numbered flag marks a record the sources disagree on
Save this cat as a PDFthe connection, the genealogy and the source on one A4 landscape sheet, carrying this directory's name and address
What is flagged on this tree
Yalta Great joy. 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
sbc-91
Sex
not stated by the source
Cattery prefix
Great Joy
Breed, as stated
Siberian
Line
Siberian, Altai or Barnaul unconfirmed
Eye status
blue-variant: both eyes blue, put down to a DBE variant or its line
Role
offspring
Relations named by the source
out of Favorite Great Joy and Abby from Koenig Glance; littermate of Yaroslava, Yana and Yasmine
Litter key
great-joy-2023-03-27
Year
born 27 March 2023
EMS code
SIB ns 22 09 61
The code read out
Siberian; black silver; blotched tabby, unspecified amount of white; blue eyes
The description held
black silver mackerel tabby with white, code 61 for blue eyes. Shaded. Annotated '(neutered)'. Silver homozygosity in this line is stated to be lethal. Professor Marie abitbol, who identified DBE-ALT and DBE-CEL, states in her 2026 World Cat Federation presentation, on the slide headed 'Malvina line', that this is a dominant blue eye line from Russia, that it was introduced into the Siberian breed, that homozygosity is lethal, that there is no data on deafness, and that the search for the variant is ongoing. This is the researcher's statement and not this survey's finding: the presentation gives the conclusion without the underlying counts, so no number of lost kittens is claimed here. 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 of this determinant 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. The determinant of this line remains unidentified and this note does not attribute one. S_LETHAL_206
Evidence grade
Reported asserted, with neither a test nor a traced descent
Blue Eyes Directory, blueeyesdirectory.com. Record sbc-91. 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
C3 blue-eyed Siberian breeder-compiled genealogy, headed 'DBE siberians (Unconfirmed if Altai gene or Barnaul gene from Altai Region)'. Close-up tiles supplied to this survey on 13 August 2026; 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.