Quote:
Originally Posted by gardenyorkies  It is the white spotting gene... |
Thanks Laura.. but I'm missing why we would want to say the same thing about the Biewers or the Parti's .. this is what I found..
WHITE BOXERS
One of the most interesting cases of white patterning occurs in the Boxer. Boxers generally come in the irish spotting pattern, so we would expect most examples of the breed to have sisi on the S locus. However, sometimes Boxer puppies are born which are completely or almost completely white. How these puppies could be regularly born to parents with much more colour perplexed Boxer breeders for a long time.
However, we can now provide an answer to this. Breeders have been breeding for "flashy" dogs, which are irish spotted dogs with more white than the normal pattern usually produces. It turns out that these dogs have more white than normal because they are not homozygous for si. Their genotype is, in fact, sisw, so they have one gene for irish spotting and one for extreme white. This is what causes them to have extra white - the incomplete dominance that si has over sw results in a dog with more white than normal irish spotting. When two of these flashy dogs are bred together, one in four of the puppies will have the extreme white pattern:
Does that make them genetically superior in some way? I may just be missing something.. the Parti's and the Biewers have the same spotting gene (White spotting meaning actually white areas as in lack of color, not actually spots) in different patterns, be it Piebald or Irish spotting..
This is a great link if anyone is interested:
Dog Coat Colour Genetics
Diana
