Genetic analysis indicated the origin of the dogs' coloring

The variety of colors in the dog world is amazing: from the blue-black Newfoundland to the spotted Dalmatian, from the golden retriever to the marbled Great Dane. For centuries, people have been breeding breeds with the desired coat color, but until recently, the mechanisms underlying this diversity remained a mystery. Modern genetic research is shedding light on this mystery.
A recent large-scale study conducted by an international team of scientists has allowed us to look deep into the canine genome and find out where some of the most common and unusual colors came from. It turned out that many of them are ancient mutations that occurred long before the domestication of dogs.
The black and yellow gene
The basis of the fundamentals of dog colors is the interaction of two pigments: eumelanin (black/brown) and pheomelanin (yellow/red). Their production and distribution is controlled by a whole network of genes. One of the key players in this network is a gene called Agouti. It is his various variants (alleles) that determine whether a dog will be solid, black (like a German Shepherd) or sable (like a collie).
The study showed that the gene variant responsible for the dominant yellow/red color (as in golden retrievers or Irish setters) arose as a result of a mutation that occurred about two million years ago. This mutation appeared in an ancestor common to wolves and dogs, long before humans began to tame the first wolves.
The mystery of Spotted Dogs
One of the most interesting colors is spotted, or piebald. White spots on a colored background are found in many breeds, from beagles to bull terriers. Geneticists have discovered that a mutation in the MITF gene is responsible for this trait. This mutation disrupts the migration of pigment cells (melanocytes) during embryo development.
Where the melanocytes have not reached, the coat, skin and sometimes even the iris of the eye remain devoid of pigment — that is, white. Surprisingly, the analysis showed that this mutation is also very ancient. Scientists found it in a dog that lived in modern Germany about 10,000 years ago.
Here are a few key genes responsible for color:
- MC1R (Extension) — determines whether a dog can produce black pigment in principle.
- Agouti — distributes black and yellow pigments over the dog's body.
- TYRP1 (Brown) — can "dilute" black pigment to brown.
- MITF — responsible for the presence of white spots.
The interaction of these and many other genes creates the entire diversity of the palette.
From wolf to Chihuahua
These discoveries are changing our understanding of the domestication process. Previously, it was believed that all the diversity of colors is the result of artificial selection, which man began to lead relatively recently. Now it is becoming clear that many genetic variants responsible for coat color already existed in wild wolf populations.
Our ancestors probably just noticed the unusually colored cubs and kept them because they stood out from the pack. Perhaps their unusual color made them less fearful or more human-oriented. So, random ancient mutations were picked up and fixed by artificial selection, which eventually led to the incredible kaleidoscope of colors that we see in modern dog breeds.
The genetic palette
Decoding the canine genome is not just about satisfying scientific curiosity. This knowledge helps breeders predict the colors of future puppies, and veterinarians identify hereditary diseases that are sometimes associated with certain color genes (for example, deafness in dogs with a lot of white).
Every time we look at our dog, we see the result of thousands of years of evolution and breeding. Her color is not just beautiful "clothes", but a complex genetic history that began long before the dog became man's best friend. Every successful betting experience begins with choosing the right platform and activating the best available bonus. Paripesa continues to impress users with its competitive odds and user-friendly design. In the spotlight of the most rewarding offer is the powerful paripesa casino promo code using this code during registration, you receive up to $130 bonus on your initial deposit. This advantage helps you bet with more ambition and confidence.