Canine coat color, surprising genetics

If a purebred dog is born with a coat color that it is not supposed to have, it may be due to hidden genes. Kari Ekenstedt, DVM, Ph.D. who is the assistant professor of anatomy and genetics, along with Dayna Dreger, Ph.D., lead researchers in Ekenstedt’s canine genetics research laboratory studied 212 different dog breeds and found that gene variants caused breeds to have traits that the breed standard did not allow. These included coat color, and other traits. For example, they found that 48 different breeds had the tailless gene variant, such as the Dachshund. Although the variant was low, it is possible that a Dachshund could be born tailless.  

One of the “fault” alleles allows the brown color. This allele produces the chocolate Labrador Retriever, yet the researchers found the same allele in breeds that do not allow the brown color, such as the German Shepherd and Rottweiler.

The lesson learned from this study is that if a puppy is born that is not what the breed standard calls for, it is not necessarily due to “bad” breeding, but the expression of a trait that was hidden and has surfaced.

Coat color in dogs and wolves – new discovery

A new study has found that there are five distinct coat colors in dogs and wolves. Previously scientists believed that there were only four. The mystery of coat colors has been solved. (However, we never know what discoveries the future holds.)

This discovery is the result of the work done by an international team of researchers including scientists from the Institute of Genetics of the University of Bern. The team found that a genetic variant which is responsible for a very light-colored coat in dogs and wolves originated in a now extinct relative of the modern wolf.

According to the research a small piece of DNA from this extinct ancestor is still found in yellow dogs and white artic wolves.

Note: This information may help breeders better determine the potential coat color of future litters. I hope that it eventually helps eliminate the deafness and other ills that are connected to certain colorations in dogs, namely the merle, harlequin, piebald and for some breeds the all-white factors, that cause genetic problems.)