Origin of the domestic dog - Wikipedia
In a wolf pack, only the alpha male and female are sexually active even though According to Groves: "The human-dog relationship amounts to a very long. Dogs today evolved from wolves who first developed a relationship with Man's best friend has provided protection, companionship and hunting together at a certain point in history and have been together ever since.". The origin of the domestic dog is not clear. The domestic dog is a member of the genus Canis, . The early domestication theory argues that the relationship commenced once humans moved into the colder .. A genetic analysis of the Newgrange dog showed that it was male, did not possess genetic variants associated with.
Dog has been man's best friend for 33,000 years, DNA study finds
Forest and woodland were almost non-existent except for isolated pockets in the mountain ranges of southern Europe. There is no evidence of megafaunal extinctions at the height of the Last Glacial Maximumindicating that increasing cold and glaciation were not factors.
Multiple events appear to have caused the rapid replacement of one species by another one within the same genusor one population by another within the same species, across a broad area. As some species became extinct, so too did the predators that depended on them.
Researcher explores close prehistoric relationship between humans and dogs
Paleoecology at this time Probable ancestor Watercolor tracing made by archaeologist Henri Breuil from a cave painting of a wolf-like canid, Font-de-GaumeFrance dated 19, years ago. During the Last Glacial Maximum there were two types of wolf. The cold north of the Holarctic was spanned by a large, robust, wolf ecomorph that specialised in preying on megafauna.
Another more slender form lived in the warmer south in refuges from the glaciation.
- Researcher explores close prehistoric relationship between humans and dogs
- Human–canine bond
- Origin of the domestic dog
When the planet warmed and the Late Glacial Maximum came to a close, whole species of megafauna became extinct along with their predators, leaving the more gracile wolf to dominate the Holarctic. The more gracile wolf was the ancestor of the modern gray wolf, which is the dog's sister but not its ancestor as the dog shows a closer genetic relationship to the now-extinct megafaunal wolf.
Two wolf haplogroups Evolutionary divergence DNA evidence indicates that the dog, the modern gray wolf above and the now-extinct Taimyr wolf diverged from a now extinct wolf that once lived in Europe.
The date estimated for the evolutionary divergence of a domestic lineage from a wild one does not necessarily indicate the start of the domestication process but it does provide an upper boundary. The divergence of the domestic horse from the lineage that led to the modern Przewalski's horse is estimated at 45, YBP but the archaeological record indicates 5, YBP.
The variance could be due to the modern wild population not being the direct ancestor of the domestic one, or the impact of a split due to climate, topography, or other environmental changes. The divergence time does not imply domestication during this specific period.
The sample provided the first draft genome from the cell nucleus of a Pleistocene carnivore and the sequence was identified as belonging to Canis lupus. The sequence indicated that the Taimyr-1 lineage was separate to modern wolves and dogs. Using the Taimyr-1 specimen's radiocarbon date in addition to its genome sequence compared to that of a modern wolf, a direct estimate of the mutation rate in dogs and wolves could be made to calculate the time of divergence.
The study calculated a mutation rate for the 7, YBP Neolithic dog and found that it matched the mutation rate of the Taimyr-1 specimen, and noted that this also matched the mutation rate for the Newgrange dog that had been calculated in an earlier study. Using the 7, YBP specimen and this mutation rate, the dog-wolf divergence time is estimated to have occurred 36, YBP and this is consistent with the timing found with the Taimyr-1 specimen in an earlier study.
The study identified six major dog yDNA haplogroups, of which two of these include the majority of modern dogs. The Newgrange dog fell into the most commonly occurring of these haplogroups. The two ancient German dogs fell into a haplogroup commonly found among dogs from the Middle East and Asia, with the Kirschbaum dog sharing a common male lineage with the extant Indian wolf.
The study concluded that at least 2 different male haplogroups existed in ancient Europe, and that the dog male lineage diverged from its nearest common ancestor shared with the gray wolf sometime between 68, YBP.
Studies of modern grey wolves have identified distinct sub-populations that live in close proximity to each other. However, the geographic origin of this radiation is not known. Where the genetic divergence of dog and wolf took place remains controversial, with the most plausible proposals spanning Western Europe,   Central Asia,   and East Asia. Ina study of the maternal mitochondrial genome indicated the origin in south-eastern Asia south of the Yangtze River as more dog haplogroups had been found there.
A history of the dog and human relationship - article on rhein-main-verzeichnis.info | rhein-main-verzeichnis.info
Ina study using single nucleotide polymorphisms indicated that dogs originated in the Middle East due to the greater sharing of haplotypes between dogs and Middle Eastern gray wolves, else there may have been significant admixture between some regional breeds and regional wolves.
Ina study of maternal mDNA indicated that the dog diverged from its ancestor in East Asia because there were more dog mDNA haplotypes found there than in other parts of the world,  but this was rebutted because village dogs in Africa also show a similar haplotype diversity. Then, one of these lineages migrated back to northern China and admixed with endemic Asian lineages before migrating to the Americas.
As soon as we see skeletal remains that look like the modern dog—say 14, years ago—we see dogs being buried. Clearly, people long ago began breeding dogs for specific purposes.
The wolves likely foraged around human campsites, gradually growing less inhibited. Once their potential as companions and workmates became apparent, they were domesticated and selectively bred. Somewhere between 10, and 15, years ago, the wolf had evolved into an animal genetically indistinguishable from the modern dog.
Though today's dog is closer genetically to its ancient ancestor than to the modern wolf, most specific dog breeds have roots that go back only about years.
How Dogs Evolved Into 'Our Best Friends'
Losey is now investigating a bountiful site of dog burials in the Siberian Arctic. With more than dog specimens, it's the largest archeological collection of dogs in the whole of the Arctic region. Here he's finding early evidence of sled dogs, wearing what appear to be harnesses, along with signs that reindeer were also harnessed. The story of humans and dogs is by no means complete, and sometimes the pieces of the puzzle don't easily fit.
But Losey hopes the archeological record will ultimately help us better understand what lies at the heart of perhaps our most enduring interspecies relationship.Mankind The Story of All of Us: Domesticating the Dog - History
The history of our working relationships with animals, and our emotional relationships, is what interests me.