DNA evidence suggests five different dog lines 11,000 years ago

DNA evidence suggests five different dog lines 11,000 years ago
DNA evidence suggests five different dog lines 11,000 years ago

Scientists have found that around 11,000 years ago, when humans were hunter-gatherers in Europe, there were at least five different types of dogs with different genetic ancestors.

The analysis is based on DNA sequenced from 27 old dog samples from across Europe, the Middle East and Siberia.

Researchers say the results, published in the journal Science, may shed light on the “inseparable bond between dogs and humans.”

Lead author Anders Bergstrom, a postdoctoral fellow in the Ancient Genomics Laboratory at the Francis Crick Institute, said, “The dog is the oldest domesticated animal and has a very long relationship with humans.

“Therefore, understanding the history of dogs teaches us not only about their history, but also about our history.”DNA analysis shows early dog ​​lines were mixed and moved to produce the dogs we know today, the researchers said.

They said early European dogs were initially diverse and appeared to come from two very different populations, one related to dogs from the Middle East and one related to Siberian dogs.

But at some point that diversity was lost as it is no longer present in European dogs today, they added.

Mr Bergstrom said, “If we look back more than four or five thousand years ago, we can see that Europe was a very diverse place when it came to dogs.

“Although the European dogs we see today come in such an extraordinary variety of shapes and forms, genetically they only come from a very narrow subset of the diversity that existed earlier.”Pontus Skoglund, group leader of the Ancient Genomics Laboratory who was also the author of the study, said, “Some of the differences you see between dogs walking down the street today come from the Ice Age.

“At the end of this time, dogs were already common in the northern hemisphere.”

The researchers also compared the changes in the history of dogs and humans.

They found that changes in human lifestyle and migrations were primarily reflected in some dog populations, but there have also been cases where the history of humans and dogs was not reflected.

For example, the researchers said that a single canine ancestor may have caused the loss of diversity that existed in dogs in early Europe, but this “dramatic event” is not reflected in the human population.

Study author Greger Larson, Director of the Research Network for Paleogenomics and Bioarchaeology at Oxford University, said: “Dogs are our oldest and closest animal partner.

“Using old dog DNA shows us how far back our history goes and will ultimately help us understand when and where this deep relationship began.”

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