Fourteen ancient breeds of dog have been identified through advances in DNA analysis. These breeds

Dog breed

Dog breeds are groups of closely related and visibly similar domestic dogs, which are all of the subspecies Canis lupus familiaris, having characteristic traits that are selected and maintained by humans, bred from a known foundation stock....

 of domesticated dog

Dog

The domestic dog is a domesticated form of the gray wolf, a member of the Canidae family of the order Carnivora. The term is used for both feral and pet varieties. The dog may have been the first animal to be domesticated, and has been the most widely kept working, hunting, and companion animal in...

 show the fewest genetic differences from wolves. The breeds are geographically diverse, including dogs from Siberia

Siberia

Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...

, Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

, China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

, Tibet

Tibet

Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people...

, and Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

.

Research

DNA from dogs of 85 (mostly) AKC

American Kennel Club

The American Kennel Club is a registry of purebred dog pedigrees in the United States. Beyond maintaining its pedigree registry, this kennel club also promotes and sanctions events for purebred dogs, including the Westminster Kennel Club Dog Show, an annual event which predates the official...

-registered breeds (5 individuals per breed in most cases) were tested by Parker et al. This study had some surprises, especially the suggestion that three breeds – the Norwegian Elkhound

Norwegian Elkhound

The Norwegian Elkhound is one of the ancient Northern Spitz-type breed of dog and is the National Dog of Norway. The Elkhound has served as a hunter, guardian, herder, and defender. In a land of subzero temperatures, deep snow, thick forests, and rugged mountains, only the hardiest of the breeds...

, Pharaoh Hound

Pharaoh Hound

The Pharaoh Hound is a breed of dog and the national hound of the Mediterranean nation of Malta. Its native name is Kelb tal-Fenek in Maltese, which means "rabbit hound". The dog is the traditional hunting companion of Maltese outdoorsmen. The breed has no conclusive links with Ancient Egypt and...

 and Ibizan Hound

Ibizan Hound

The Ibizan Hound , pronounced "I-bee-zan" or "I-beeth-an", is a lean, agile dog of the hound family. There are two hair types of the breed: smooth and wire. The more commonly seen type is the smooth...

 – are not as old as typically stated, but rather are more recent recreations of old types. Also, five pairs of breeds are closely related: Alaskan Malamute

Alaskan Malamute

The Alaskan Malamute is a generally large breed of domestic dog originally bred for use as a utilitarian dog and later an Alaskan sled dog. They are sometimes mistaken for a Siberian Husky, but in fact are quite different in many ways...

 and Siberian Husky

Siberian Husky

The Siberian Husky is a medium-size, dense-coat working dog breed that originated in north-eastern Siberia. The breed belongs to the Spitz genetic family...

, Collie

Collie

The collie is a distinctive type of herding dog, including many related landraces and formal breeds. It originates in Scotland and Northern England. It is a medium-sized, fairly lightly built dog with a pointed snout, and many types have a distinctive white pattern over the shoulders. Collies...

 and Shetland Sheepdog

Shetland Sheepdog

The Shetland Sheepdog, often known as the Sheltie, is a breed of herding dog.They are small to medium dogs, and come in a variety of colors, such as sable/white, tri-color, and blue merle. They are vocal, excitable, energetic dogs who are always willing to please and work hard...

, Greyhound

Greyhound

The Greyhound is a breed of sighthound that has been primarily bred for coursing game and racing, and the breed has also recently seen a resurgence in its popularity as a pedigree show dog and family pet. It is a gentle and intelligent breed...

 and Whippet

Whippet

The Whippet is a breed of dog in the sighthound family. They are active and playful and are physically similar to a small Greyhound.- Description :...

, Bernese Mountain Dog

Bernese Mountain Dog

The Bernese Mountain Dog, called in German the Berner Sennenhund, is a large breed of dog, one of the four breeds of Sennenhund-type dogs from the Swiss Alps. The name Sennenhund is derived from the German "Senne" and "hund" , as they accompanied the alpine herders and dairymen called Senn...

 and Greater Swiss Mountain Dog

Greater Swiss Mountain Dog

The Greater Swiss Mountain Dog is a dog breed which was developed in the Swiss Alps. The name Sennenhund refers to people called Senn or Senner, dairymen and herders in the Swiss Alps. Greater Swiss Mountain Dogs are almost certainly the result of indigenous dogs mating with large Mastiff types...

, and finally the Bull Mastiff and English Mastiff

English Mastiff

The English Mastiff, referred to by virtually all Kennel Clubs simply as the Mastiff, is a breed of large dog perhaps descended from the ancient Alaunt through the Pugnaces Britanniae. Distinguishable by enormous size, massive head, and a limited range of colors, but always displaying a black mask,...

.

However, the assumption that a small sample from a single dog breed can be representative for the entire breed, is argued to be invalid by long-time repeated incidental or intentional interbreeding with local dogs, thereby gradually replacing original wolf clade

Clade

A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...

elements but maintaining the original phenotype by ongoing selection for the original use and conformation. This evolution can be seen also in the high proportion of European clade in Asian breeds close to Europe, like Saluki and Samoyed, while a geographically remote Nordic spitz, the Siberian Husky, does not show such a replacement of the original wolfdog structure. Also, as there are some 400 known dog breeds (of which the AKC recognizes 167), it is possible that an extended study would reveal additional "ancient" breeds.