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Gene C: Full colour

 
Eurocatfancy
Genetic terms in cats
Genome of the cat
Dominance of genes
Cat Breeding techniques
Crossing Table 1
Crossing Table 2
Crossing Table 3
Gene A: Agouti
Gene B: Black
Gene C: Full colour
Gene D: Diluted
Gene Dm: Dilute modifier
Gene Fd: Folded ears
Gene I: Inhibitor
Gene L: Shorthair
Gene Mc: Mackerel
Gene O: Orange
Gene S: Piebald spotting
Gene W: White
Gene XY: Sex
Quality Points for Cats
   
[Gene C: Colour variants]

 

Gene C: Full colour

Gene group C, cs, cb, ca, c

These group is called the Albino serie.

 

FULL COLOUR Gene C

Gene C is responsible that the coat is full coloured without Points.
It is dominant over its alleles. Gene C must be present only once to see its expression.

Alleles

This serie is called to be incomplete dominant, as between the alleles cannot be given a strict order of dominance over each other.
It is only assured that gene C is dominant over its alleles.

SIAMESE Gen cs

Gene cs is recessive to gene C. Your cat must have either cscs, cscb, csca or csc that the coat shows points.

sealpoint

BURMESE Gene cb

Gene cb is recessive to gen to gene C.
A cat must carry cbca, cbc or cbcb to show a Burmese pattern in the phenotype.

ALBINO Gene ca

Gene ca is recessive to gene C.
Albino with light blue eye colour.

ALBINO Gene c

Gene c is recessive to all other alleles.
Albino with pinkish eye colour. A cat must carry gene c twice to be a true Albino.

Possible gene combinations

CC homozygous full coloured
Ccs heterozygous full coloured
carries siamese pattern
Ccb heterozygous full coloured
carries burmese pattern
Cca heterozygous full coloured
carries the albino gene
Cc heterozygous full coloured
carries the albino gene
cscs homozygous for siamese pattern
These cats show the siamese pattern in their phenotype and have blue eyes.
cscb heterozygous for siamese pattern
This pattern is called Tonkinese pattern and have an eye colour like green water.
csca heterozygous for siamese pattern
csc heterozygous for siamese pattern
cbcb homozygous for burmese pattern
These cats show the burmese pattern in their phenotype.
cbca heterozygous for burmese pattern
cbc heterozygous for burmese pattern
caca homozygous Albino
These cats are Albinos with light blue eye colour.
cac heterozygous Albino
cc homozygous Albino
These cats are Albinos with pinkish eye colour.
If you want to know which colours are possible then click here.

 

What are Points ?

A cat has points if

  • It has a mask on its face, the mask is darker coloured then the rest of the head.
  • The ears are darker coloured in the same colour like the mask.
  • The legs are darker coloured in the same colour like the mask.
  • The tail is darker coloured in the same colour like the mask.
  • The body has a lighter colour than the point colour.

Well known are the Siamese points. There the body is almost white (off white) while the points can be of various colours, blue - blue pointed, seal - seal pointed, tortie - tortie pointed, lilac tabby - lilac tabbypoint, etc. Cats with Siamese pattern have blue eyes.
You find this pattern of course in the Siamese and in their longhair version the Balinese - note the name Balinese is not because the cats are originating from Bali, it is an artificial name.

You find the pattern also in the Colourpoint Persians and Exotic - in some federations those Persian cats are called Himalayan, in older times they have been called Khmer.

You can also find the siamese pattern in the Rex, then they are often called Si-Rex.

Also Birman cats are pointed cats. Besides their points their white gloves are characteristique for this breed.

And recently you find this pattern also in the Colourpoint British.

Also Burmese cats are pointed cats. But the difference in colour between the point colour and the body colour is only gradually, the body colour is the same colour like the points which show slightly a darker shade.

Tonkinese A Tonkinese pattern can be seen inbetween those two, but the contrast between the points and the body colour is clearly to be seen, the body itself is not off white it has the same colour tone like the points but lighter. Their eye colour is that of green water, it is called aquamarine.
Well known are the Tonkinese themselves, a shorthaired breed. A speciality of the Tonkinese is that they are heterozygous, a cross breeding between Siamese and Burmese, and therefore you'll find also Siamese and Burmese pointed cats in their litter.

 

How can this theoretical knowledge be used for the breeding practice ?

You want to breed Colourpoint Persians

Example 1

You have already a colourpoint Persian female and want to get colourpoint tabby point kittens.
You can go in two different ways:
- You use a colourpoint tabby point stud male.
- You use a tabby stud male which carries the colourpoint gene cs.

Let's assume You have a sealpoint Persian female: aa B- cscs D- oo mcmc
We omit the combinations "ii" (our female is a non-silver point) and "ss" (we will deal with this in a later example, when we have a look at the Ragdolls). For the underlying tabby pattern we assume tabby blotched.
 

Case 1:
We use a red colourpoint tabby point stud male: A- B- cscs D- OY mcmc
To make our table easier we assume that the male carries also mcmc.

  female
aBcsDomc aBcs-omc a-csDomc a-cs-omc
male ABcsDOmc AaBBcscsDDOomcmc
seal tortie tabbypoint female
AaBBcscsD-Oomcmc
seal tortie tabbypoint female
AaB-cscsDDOomcmc
seal tortie tabbypoint female
AaB-cscsD-Oomcmc
seal tortie tabbypoint female
ABcsDYmc AaBBcscsDDoYmcmc
seal tabbypoint male
AaBBcscsD-oYmcmc
seal tabbypoint male
AaB-cscsDDoYmcmc
seal tabbypoint male
AaB-cscsD-oYmcmc
seal tabbypoint male
ABcs-Omc AaBBcscsD-Oomcmc
seal tortie tabbypoint female
AaBBcscs--Oomcmc
seal/blue tortie tabbypoint female
AaB-cscsD-Oomcmc
seal tortie tabbypoint female
AaB-cscs--Oomcmc
seal/blue tortie tabbypoint female
ABcs-Ymc AaBBcscsD-oYmcmc
seal tabbypoint male
AaBBcscs--oYmcmc
seal/blue tabbypoint male
AaB-cscsD-oYmcmc
seal tabbypoint male
AaB-cscs--oYmcmc
seal/blue tabbypoint male
A-csDOmc AaB-cscsDDOomcmc
seal tortie tabbypoint female
AaB-cscsD-Oomcmc
seal tortie tabbypoint female
Aa--cscsDDOomcmc
seal/chocolate/cinnamon tortie tabbypoint female
Aa--cscsD-Oomcmc
seal/chocolate/cinnamon tortie tabbypoint female
A-csDYmc AaB-cscsDDoYmcmc
seal tabbypoint male
AaB-cscsD-oYmcmc
seal tabbypoint male
Aa--cscsDDoYmcmc
seal/chocolate/cinnamon tabbypoint male
Aa--cscsD-oYmcmc
seal/chocolate/cinnamon tabbypoint male
A-cs-Omc AaB-cscsD-Oomcmc
seal tortie tabbypoint female
AaB-cscs--Oomcmc
seal/blue tortie tabbypoint female
Aa--cscsD-Oomcmc
seal/chocolate/cinnamon tortie tabbypoint female
Aa--cscs--Oomcmc
seal/chocolate/cinnamon tortie tabbypoint
or blue/lilac/fawn tortie tabbypoint female
A-cs-Ymc AaB-cscsD-oYmcmc
seal tabbypoint male
AaB-cscs--oYmcmc
seal/blue tabbypoint male
Aa--cscsD-oYmcmc
seal/chocolate/cinnamon tabbypoint male
Aa--cscs--oYmcmc
seal/chocolate/cinnamon tabbypoint
or blue/lilac/fawn tabbypoint male
aBcsDOmc aaBBcscsDDOomcmc
seal tortie point female
aaBBcscsD-Oomcmc
seal tortie point female
aaB-cscsDDOomcmc
seal tortie point female
aaB-cscsD-Oomcmc
seal tortie point female
aBcsDYmc aaBBcscsDDoYmcmc
seal point male
aaBBcscsD-oYmcmc
seal point male
aaB-cscsDDoYmcmc
seal point male
aaB-cscsD-oYmcmc
seal point male
aBcs-Omc aaBBcscsD-Oomcmc
seal tortie point female
aaBBcscs--Oomcmc
seal/blue tortie point female
aaB-cscsD-Oomcmc
seal tortie point female
aaB-cscs--Oomcmc
seal/blue tortie point female
aBcs-Ymc aaBBcscsD-oYmcmc
seal point male
aaBBcscs--oYmcmc
seal/blue point male
aaB-cscsD-oYmcmc
seal point male
aaB-cscs--oYmcmc
seal/blue point male
a-csDOmc aaB-cscsDDOomcmc
seal tortie point female
aaB-cscsD-Oomcmc
seal tortie point female
aa--cscsDDOomcmc
seal/chocolate/cinnamon tortie point female
aa--cscsD-Oomcmc
seal/chocolate/cinnamon tortie point female
a-csDYmc aaB-cscsDDoYmcmc
seal point male
aaB-cscsD-oYmcmc
seal point male
aa--cscsDDoYmcmc
seal/chocolate/cinnamon point male
aa--cscsD-oYmcmc
seal/chocolate/cinnamon point male
a-cs-Omc aaB-cscsD-Oomcmc
seal tortie point female
aaB-cscs--Oomcmc
seal/blue tortie point female
aa--cscsD-Oomcmc
seal/chocolate/cinnamon tortie point female
aa--cscs--Oomcmc
seal/chocolate/cinnamon tortie point
or blue/lilac/fawn tortie point female
a-cs-Ymc aaB-cscsD-oYmcmc
seal point male
aaB-cscs--oYmcmc
seal/blue point male
aa--cscsD-oYmcmc
seal/chocolate/cinnamon point male
aa--cscs--oYmcmc
seal/chocolate/cinnamon point
or blue/lilac/fawn point male

 

Case 2:
We use a blue tabby stud male which carries the colourpoint gene cs: A- B- Ccs dd mcmc
To make our table easier we omit the combinations "ii", "oo" and "ss" as they are not relevant for the colour - but note, that they are present of course - and we assume that the male is tabby blotched and therefore carries mcmc.

Our female is still the same: aa B- cscs D- mcmc
We omit here also the combinations "ii", "oo" and "ss" as they are not relevant for the colour.

  female
aBcsDmc aBcs-mc a-csDmc a-cs-mc
male ABCdmc AaBBCcsDdmcmc
black tabby
AaBBCcsd-mcmc
black/blue tabby
AaB-CcsDdmcmc
black tabby
AaB-Ccsd-mcmc
black/blue tabby
ABcsdmc AaBBcscsDdmcmc
seal tabbypoint
AaBBcscsd-mcmc
seal/blue tabbypoint
AaB-cscsDdmcmc
seal tabbypoint
AaB-cscsd-mcmc
seal/blue tabbypoint
A-Cdmc AaB-CcsDdmcmc
black tabby
AaB-Ccsd-mcmc
black/blue tabby
AaB-CcsDdmcmc
black tabby
AaB-Ccsd-mcmc
black/blue tabby
A-csdmc AaB-cscsDdmcmc
seal tabbypoint
AaB-cscsd-mcmc
seal/blue tabbypoint
Aa--cscsDdmcmc
seal/chocolate/cinnamon tabbypoint
Aa--cscsd-mcmc
seal/chocolate/cinnamon or blue/lilac/fawn tabbypoint
-BCdmc a-B-CcsDdmcmc
black or black tabby
a-B-Ccsd-mcmc
black/blue or black/blue tabby
a-B-CcsDdmcmc
black or black tabby
a-B-Ccsd-mcmc
black/blue or black/blue tabby
-Bcsdmc a-B-cscsDdmcmc
seal point or seal tabbypoint
a-B-cscsd-mcmc
seal/blue point or seal/blue tabbypoint
a-B-cscsDdmcmc
seal point or seal tabby point
a-B-cscsd-mcmc
seal/blue point or seal/blue tabbypoint
--Cdmc a-B-CcsDdmcmc
black or black tabby
a-B-Ccsd-mcmc
black/blue or black/blue tabby
a---CcsDdmcmc
black/chocolate/cinnamon or black/chocolate/cinnamon tabby
a---Ccsd-mcmc
black/chocolate/cinnamon or blue/lilac/fawn or black/chocolate/cinnamon tabby or blue/lilac/fawn tabby
--csdmc a-B-cscsDdmcmc
seal point or seal tabbypoint
a-B-cscsd-mcmc
seal/blue point or seal/blue tabbypoint
a---cscsDdmcmc
seal/chocolate/cinnamon point or seal/chocolate/cinnamon tabbypoint
a---cscsd-mcmc
seal/chocolate/cinnamon point or blue/lilac/fawn point or seal/chocolate/cinnamon tabbypoint or blue/lilac/fawn tabbypoint

 

As you can see on both tables in some cases we are not able to decide the colour clearly, because we didn't know the full code of the parents - that's indicated by the "-".
In practice you use these tables to derive backwards the encoding of the parents. Once you have determined the colour of the kittens, you can fill out more parts of the table and deduct backwards some more parts of the encoding of the parents.

In the second table you can see another phenomenon, all non-colourpoints are colourpoint carriers, so called Colourpoint Hybrids - from outside they don't show points but inside they carry them. Such Hybrids are very often used in breeding programs - see our example 3.
 

Example 3

As you know it is still a problem with the Colourpoints that they are not so typy as their non-pointed collegues. How can that be improved that they get shorter noses ?
A very common breeding practice is to use solid (=non-pointed and non-colourpoint carriers) coloured cats because they are more typy and to mate them with colourpoints. The improvement in type already in the 1st generation is obvious.
And from this litter, which are all Colourpoint-Hybrids the best one is kept and used for further breeding.
A common practice is to breed Colourpoints from two Hybrids.
But note the eye colour of the Hybrids can be lighter orange and the blue eye colour of the Colourpoints bred from two hybrids might be faded. Sometimes also white cats with blue eyes are used - but only use cats with deep blue eye colour and which are not deaf.

1. step:
We mate colourpoints with solid coloured cats and keep from each mating one colourpoint-hybrid.
It doesn't matter wether the female or the male is the solid part.
We assume the male is solid coloured.
  male
C C
female cs Ccs Ccs
cs Ccs Ccs

All the kittens are colourpoint carriers and we will keep the most typy ones for further breeding.

2. step:
Now we mate 2 hybrids.

By the way to find out wether a cat is a colourpoint carrier or not you have to do test mating either to mate the cat to a hybrid which is known to carry the gene cs or to mate the cat with a colourpoint. If the cat carries the gene cs you must get colourpoint kittens otherwise not.
  male
C cs
female C CC
no colourpoint carrier
Ccs
colourpoint carrier
cs Ccs
colourpoint carrier
cscs
colourpoint

 

What you can see in this table is that we got a colourpoint kitten and that we have increased the number of colourpoint carriers.

 

What's about the Ragdolls ?

The Ragdolls are also pointed cats. Their genetic encoding looks like this:

Bicolour: aa cscs SS
Mitted: aa cscs Ss
Colourpoint: aa cscs ss

Bicolour and mitted Ragdolls also must show white feet, which are caused by another gene, the so called gloving gene (we will deal with it later).
You find them mostly in the colours seal, blue, chocolate and lilac, red and cream, you have to add "BB" or "Bb" for the seal/blue, "bb" for the chocolate/lilac, and "OO/OY" or "Oo" for the red and tortie.
If they are non-diluted you add "DD" or "Dd" - seal, chocolate,red and tortie, and for the diluted you add "dd" - blue, lilac, cream and diluted tortie.

non-diluted colour diluted colour
bicolour seal aa B- cscs D- SS blue aa B- cscs dd SS For "B-" you may put "BB" or "Bb".
For "D-" you may put "DD" or "Dd".

Note:
In the red/cream cat, the cat may carry black (B-) or chocolate (bb).
The tortie may be either a black tortie (B- Oo) or a chocolate tortie (bb Oo).
The same goes for the diluted tortie: it may be either a bluecream (B- dd Oo) or a lilac tortie (bb dd Oo).

chocolate aa bb cscs D- SS lilac aa bb cscs dd SS
red aa B-/bb cscs D- OY   male
aa B-/bb cscs D- OO   female
cream aa B-/bb cscs dd OY   male
aa B-/bb cscs dd OO   female
tortie aa B-/bb cscs D- Oo   female diluted tortie aa B-/bb cscs dd Oo   female
mitted seal aa B- cscs D- Ss blue aa B- cscs dd Ss
chocolate aa bb cscs D- Ss lilac aa bb cscs dd Ss
red aa B-/bb cscs D- OY Ss male
aa B-/bb cscs D- OO Ss female
cream aa B-/bb cscs dd OY Ss male
aa B-/bb cscs dd OO Ss female
tortie aa B-/bb cscs D- Oo Ss female diluted tortie aa B-/bb cscs dd Oo Ss female
colourpoint seal aa B- cscs D- ss blue aa B- cscs dd ss
chocolate aa bb cscs D- ss lilac aa bb cscs dd ss
red aa B- cscs D- OY ss   male
aa B- cscs D- OO ss   female
cream aa B- cscs dd OY ss   male
aa B- cscs dd OO ss   female
tortie aa B- cscs D- Oo ss   female diluted tortie aa B- cscs dd Oo ss   female

 

If you breed Ragdolls you need all 3 varieties, Bicolour, Mitted and Colourpoint. You should not only use Bicolours, as you could produce Vans which are undesirable because they have too much white.

Example 4:
We cross a bicolour chocolate Ragdoll with a mitted lilac Ragdoll.

Our chocolate bicolour male has the combination: aa bb cscs D- SS

The lilac mitted female has the combination: aa bb cscs dd Ss.

Of course both of them carry also "ii" - as they are non-silver - and "oo" - as they are not red.
Which tabby pattern they carry is not important, because they cannot show it as they carry "aa".
  male
abcsDS abcs-S
female abcsdS aabbcscsDdSS
chocolate bicolour
aabbcscsd-SS
chocolate/lilac bicolour
abcsds aabbcscsDdSs
chocolate mitted
aabbcscsd-Ss
chocolate/lilac mitted

 

If you want to know which Siamese and Burmese colours are possible click here.

 
[A] [B] [C] [cb & cs] [D] [Dm] [Fd] [I] [L] [Mc] [O] [S] [W] [XY]

 
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