What cats are considered blue? - briefly
Cats with a diluted gene that affects their coat color are often referred to as "blue" cats. The most common breeds known for this trait include the Russian Blue and the Chartreux.
What cats are considered blue? - in detail
The term "blue cat" is often used to describe feline breeds with a distinctive blue-gray coat color, which is the result of dilution of black pigment in the fur. This genetic trait is commonly seen in several cat breeds and is formally recognized by various cat registries worldwide. Here are some details about cats that are considered blue:
Russian Blue
The Russian Blue is perhaps the most well-known blue cat breed. Originating from Russia, these cats have a striking blue-gray coat that is short and dense, with a lustrous sheen. Their eyes are typically green or gold, adding to their overall elegant appearance. The diluted black gene responsible for this coloration is recessive, meaning both parents must carry the gene for the kittens to inherit it.
British Blue (British Shorthair)
The British Blue, also known as the British Shorthair, is another popular breed with a distinct blue-gray coat. This breed originated in England and was developed by crossbreeding domestic shorthairs with foreign breeds such as Russian Blues. Their short, dense fur and muscular build make them robust and sturdy cats. The diluted black gene in British Blues results in a soft, silvery blue color.
Scottish Fold
The Scottish Fold is known for its unique ear structure—the ears fold forward and downward, giving the cat an owl-like appearance. While this breed comes in various colors, including blue. The blue Scottish Folds have the same diluted black gene that gives their coat a distinctive blue-gray hue. They are medium-sized cats with a round body and large, expressive eyes.
American Shorthair
The American Shorthair is another breed that can exhibit the blue coloration. This breed was developed in the United States from domestic shorthairs brought over by European settlers. The diluted black gene in American Shorthairs produces a coat color ranging from light silver-blue to dark slate gray. These cats are known for their sturdy build and adaptability, making them popular pets.
Korat
The Korat is an ancient breed from Thailand, known for its unique coat pattern rather than a uniform blue color. The Korat's coat is silver-tipped blue, giving it a distinctive shimmering appearance. Their large, green eyes and heart-shaped head contribute to their overall charm. The diluted black gene in Korats creates a short, fine coat with a blue-gray base and silver tips.
Other Breeds
Several other cat breeds can also have blue coats due to the dilution of black pigment, including the Maine Coon, Ragdoll, and Sphynx. In these breeds, the blue coloration is less common but still genetically possible. The diluted black gene in these cats results in a similar blue-gray coat color as seen in other blue cat breeds.
Genetics of Blue Coat Color
The genetic basis for the blue coat color is well understood. The dilution of black pigment (eumelanin) is caused by a recessive allele at the B locus, often denoted as b/b. When both parents carry this recessive gene, their offspring can inherit and express the blue coat color. This genetic trait is consistent across various cat breeds, leading to the distinctive blue-gray appearance in cats.
In conclusion, several cat breeds are recognized for their blue coats, including the Russian Blue, British Blue (British Shorthair), Scottish Fold, American Shorthair, and Korat. The genetic basis for this coat color is the dilution of black pigment, governed by a recessive allele at the B locus. Understanding the genetics behind the blue coat color helps in breeding programs and maintaining the distinctive appearance of these cats.