Nuphar’s 2012
Frontpage News Blog About us The Barbet Alba Lotus Cait Tux Food and care Puppies Links The Barbet The breed Breedstandard Colors&Genetics
Key: BB = black, no brown gene Bb = black, carries brown gene bb = brown, no black gene Yellow is produced by the presence of a recessive epistatic gene which has the effect of masking the black or brown genes. EE = no yellow gene Ee = yellow carrier but appears either black or brown ee = yellow
So.... BBEE =Black BbEE =Black that carries brown BBEe =Black that carries yellow BbEe =Black that carries yellow and brown bbEE =Brown that does not carry yellow bbEe = Brown that carries yellow BBee =Yellow that does not carry brown Bbee =Yellow that carries brown bbee =Yellow with brown nose
COLORFUL (adjusted from a blog posted on January 21st 2012) Colorful is a word you could use to describe the Barbets personality. They are funny, smart, sweet, loyal and will make you smile every day. But nowadays the word is getting more appropriate for the Barbets coat as well, with more and more ‘fawns’ being born. Personally, I myself can’t be bothered by color. A dog could be purple with blue spots for all I care. When leaving character and health out of the quotation, I feel type is way more important. Color and type are related, as is known in many breeds where more than one color is permitted and I also see it in the Barbet. The colors we see right now are black, brown and fawn or sand. When learning about genetics, most will start with brown and black. For these genes a B (and/or b) is used. The fawn or sand is what is called ‘recessive red’ or ‘yellow’ in genetic terminology. For this the letter E (and/or e) is used. A dog that has genotype ee will be yellow. The color can vary from dark red to apricot, a sandy color or even what most people would call white (for example the Swiss White Shepherd Dog may be called white even in the breedname, but on a genetic level these dogs are all yellow). In some breeds they have a name for every shade between dark red and white, but when looking at the genes all these dogs are ee. In colors, the funny thing is that what you see is not always what you get. A dogs phenotype is what you can see from the outside. We can see this:
What we can't see on the inside, the genotype, could be different. Maybe those dogs are this:
The yellow color you could regard as an extra ‘layer’, which is put over the basic coat color of black or brown. So a black or brown dog can carry the gene for yellow, just as a yellow dog will carry genes for black and/or brown.
Summarizing:
For some dogs it’s easy to determine or guess their genotype, or at least part of their genotype. Looking at the pedigree will tell you a lot. For others, it takes a breeding to a dog of a certain genotype to see if a dog produces a certain color. There are a lot of different combinations and results. To see what a certain combination could produce, select the phenotypes of the parents below. You will see a list of all possible combinations. If you click the link underneath the combination, you will see the result including the percentages which you could expect.
Not taken into the equation here are the white markings, since these are not colors but patterns. For the white markings, there are four alleles who are called ‘the S series’. S, which stands for ‘solid color’. Dogs with SS have no white hairs, or a tiny amount. Si stands for Irish spotting. Irish markings are those we see in for instance the Collies. Sp stands for piebald, where there is more white and the patches are distributed more randomly about the body. Sw stands for ‘extreme white piebald’. The difficult thing with this series is that they are ‘incompletely dominant’. A combination of these genes will give differing amounts of white. Some textbook examples: SiSi is what is regarded as ‘normal pattern’ such as in Collies. Dogs with a ‘mantle’ such as in Great Danes are SiSw. SwSw often gives white bodies and colored heads. It’s hard to tell what genotype a dog with white markings has. Even in breeds where most dogs are homozygous such as Collies, once in a while a pied puppy pops out with all the Irish marked once, indicating at least one of the parents is nót homozygous. What we can do is decide what phenotype a white marked dog has. The difference between Irish marked and pied/piebald is made based on whether a dog has white markings on the body, surrounded by color. A dog goes from pied to extreme piebald when the body is white without any spots of color, though a spot of color around the base of the tail is often seen in extreme pieds. Then we also have the G, or Greying gene which is a dominant gene that causes a dog to gray with age. This is not grey as we see with old dogs, but a greying over the complete body. The pigmented hairs are progressively replaced with unpigmentated hairs. In the Barbet, this gene seems to have influence on brown dogs mostly. Again, the color of a dog is not important for me. However, I do like the puzzle of color genetics. All of the above is what I have been taught and what I have found out by searching and reading. It is basic genetics as they apply to dogs of every breed ánd many other mammals. I am by no means an expert and cannot guarantee any of it. If only other traits, such as genetic diseases, were as easily traceable. Especially polygenetic disorders such as epilepsy are a horrible curse for any breed. Scientists learn more everyday and maybe one day we will know about the genetic codes for that!
The Barbet Colors&Genetics