blueeyesdirectory.comGenealogy trace · issued 14 September 2026

Joyfield's Dolly

How this cat connects, or does not connect, to an identified dominant blue eye variant. Generated from the register at build time.

Full recordAll cats

The animal

Register id
mco-13
Proposed variant field
DBE 164p (proposed coding, not issued by any registry)
Breed
Maine Coon
Cattery prefix
Joyfield
Coat and code
MCO g 09 68
Eye state
blue-variant — both eyes blue, put down to a DBE variant or its line
Sex
female
Born
15 April 2017
Country
Netherlands

What the proposed field says, and why it reads that way. The variant is attributed to this animal from the record rather than from a result on it. The scheme is set out in full in the proposal. No registry issues this field today: it is computed from this cat's record at each build, so it changes by itself the day a laboratory result is entered, and nothing here has to be reissued.

What the register holds

Evidence grade
Lineage genotyped — not tested. THE VARIANT IS FIXED BY A DNA GENOTYPE IN A PARENT OR AN OFFSPRING, and only one variant sits in the ancestry, so which variant this animal carries is settled without a sample of its own
Variant
DBE-RE
Line
Rociri Elvis, by descent
On what footing
descends from Rociri Elvis, given on the pedigree as Rociri's Elvis

The trace

  1. Joyfield's Dolly
    MCO g 09 68 · blue-variant
  2. Rociri Elvis, given on the pedigree as Rociri's Elvis — the line's founder
    MCO e 09 68 · blue-variant

Read this as parentage and nothing more. Each step is a parent recorded in the register from a pedigree or a breeder document. It shows how this cat descends from the founder of its line. It does not show which variant the cat carries, and it is not a substitute for a test.

Recorded ancestry, 4 generations

GenerationCats heldCarrying a variant
12 of 2 possibleDBE-RE
24 of 4 possiblenone
38 of 8 possiblenone
48 of 16 possiblenone

What this page does not establish

This cat has a laboratory result. The grade above says which kind.

This is not a health certificate. It says nothing about hearing, and nothing about whether this cat should be bred from. Deafness in this trait is associated with carrying two different variants at once, which no pedigree can show and only a test can.

What would change this page

This directory is built from what people send it. For this cat it does not hold:

Sending a pedigree, a photograph or a test result. A pedigree has to be one a registry or club issued, because that is the only document that settles a parent; a breeder chart is welcome but is recorded at a lower grade and cannot draw a descent. The contact page says what to send and how. A correction is as welcome as an addition: where this page is wrong about your cat, the record is changed and the source you supply is named on it.

Blue Eyes Directory · blueeyesdirectory.com · generated 14 September 2026 from the register. The register is compiled from published charts, registry documents and breeder statements, each named on the cat's full record. Where two sources disagree the record says so and does not choose between them.