(Photo is a long haired weimaraner)
According to new research, each breed of dog have more variance within their genes than previously thought. Scientists took a look at multiple genes of 212 different breeds and found that they had traits that were previously thought to be unrelated to them. Things like brown coloring in Rottweilers, who are not known for having a brown color or long hair in weimaraners. The scientists call them "fault" genes, or genes not associated with the breed standard.
I think getting information on gene variants not already known is important because there are some owners who are extremely picky and only want purebred puppies, and are not always willing to take a litter if they think that the dogs are mutts. It also means that there is the chance to look more closely at new phenotypes for our favorite furry friends.
Related Article: https://www.akc.org/dog-breeds/weimaraner/