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Modern breeding reduced horse diversity within centuries: study

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The horses that galloped the earth just a thousand years ago probably looked very different from their modern descendants, researchers said Thursday after compiling the most complete genetic history of any non-human species.

But the biggest surprise of the vast study, which involved an international team of 121 scientists and was published Thursday in the journal Cell, was the staggering loss of genetic diversity in the past 200 to 300 years that accompanied modern breeding practices.

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The horse was one of the last animals that was domesticated by humans, long after dogs, cattle and pigs.

But around 5,500 years ago, people began to ride, milk and lock horses in pens — and things would never be the same between the two species.

“The horse has had a profound effect on human history,” said Ludovic Orlando, a research director with CNRS and the University of Toulouse, who coordinated the study.

Thanks to the horse, “we were able to go faster, further, and to conquer new territories. We went to war differently. We were able to plough fields and do agriculture,” he said.

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     AFP/File / Jan FLEMR Two Przewalski horses released in southwestern Mongolia

“The horse of Alexander the Great was so remarkable that we know his name, Bucephalus.”

But scientists still don’t know the answer to a key question: what was the ancestor of the current domestic horse?

To this end, the team analyzed the genomes of 278 specimens (mostly horses but also donkeys and mules discovered inadvertently), mostly from the past 5,000 years, across Europe and Asia.

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“This is the largest register of ancient genomes ever collected for a non-human species,” said Orlando.

– Two extinct lineages –

Ancient genetics research saw a major technological leap in 2010 that allowed the team, working in a Toulouse laboratory, to extract and analyze DNA from bones that was not accessible before.

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This led to a number of surprising discoveries: for one, an ancient line of horses were present in Iberia until at least 4,000 years ago — before mysteriously disappearing completely.

On the other end of the Eurasian landmass, another lineage of horses roaming Siberia also completely disappeared around the third millennium BCE.

“They are a sort of horse equivalent of what Neanderthals are to modern humans,” Orlando said.

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Today there remain but two lineages: the domestic horse and Przewalski’s horse, also called the Mongolian wild horse.

                                                                      AFP/File / ELVIS BARUKCIC Wild horses graze scarce dried grass and hydrate by eating snow on a pasture atop Krug Mountain, near Western Bosnian town of Livno

They most likely originated in Central Asia, but this is only a hypothesis: to date, no genetic ancestor has been found.

Scientists say they are struck by the speed with which the genetic diversity of horses collapsed in the last two to three centuries, after remaining constant for the previous 4,000 years of domestication.

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The 16th and 17th centuries saw the emergence of the concept of “pure” breeds.

“All the current breeds, from the Shetland pony to the Thoroughbred, were made then,” said Orlando, with traits such as speed over short distances probably favored.

Another major shift occurred between the 7th and 9th centuries, during the Arab-Muslim expansion. The invaders brought with them an oriental horse, descended from the Persian empire of the Sassanids.

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A more elegant animal with a finer silhouette, this horse mixed with those that were predominant in Europe at the time, while their ancestors, those mounted by the Romans and Gauls, are today confined to two regions: Iceland and the British Isles, where they were taken by the Vikings.

“What we picture as a horse today and what we picture as a horse from a thousand years ago or two thousand years ago was likely actually very different,” said Orlando — who says his next goal, with the more than 30 other universities involved in the project, is to find out which human culture first domesticated our equine friends.

“Horse domestication is central to human history, and in 2019, we still don’t understand where it started. That’s mind-blowing.”

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Enjoy this piece?

… then let us make a small request. Like you, we here at Raw Story believe in the power of progressive journalism — and we’re investing in investigative reporting as other publications give it the ax. Raw Story readers power David Cay Johnston’s DCReport, which we've expanded to keep watch in Washington. We’ve exposed billionaire tax evasion and uncovered White House efforts to poison our water. We’ve revealed financial scams that prey on veterans, and efforts to harm workers exploited by abusive bosses. We’ve launched a weekly podcast, “We’ve Got Issues,” focused on issues, not tweets. Unlike other news sites, we’ve decided to make our original content free. But we need your support to do what we do.

Raw Story is independent. You won’t find mainstream media bias here. We’re not part of a conglomerate, or a project of venture capital bros. From unflinching coverage of racism, to revealing efforts to erode our rights, Raw Story will continue to expose hypocrisy and harm. Unhinged from corporate overlords, we fight to ensure no one is forgotten.

We need your support to keep producing quality journalism and deepen our investigative reporting. Every reader contribution, whatever the amount, makes a tremendous difference. Invest with us in the future. Make a one-time contribution to Raw Story Investigates, or click here to become a subscriber. Thank you.



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Prince Andrew’s fate in potential Epstein lawsuit entirely in the hands of Donald Trump

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MSNBC legal analyst Danny Cevallos said President Donald Trump has a unique ability to tip the scales in one possible legal case related to sex trafficker Jeffrey Epstein.

The "Morning Joe" contributor was discussing the latest developments in the case, after Epstein's death earlier this month in jail -- two days after signing a new will.

"You can't hold the attorneys liable because someone wants to prepare a will," Cevallos said, "but remember, they fought to take him off suicide watch and they had to say he's not a suicide risk. otherwise, they would have kept him on suicide watch."

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Internet cheers ‘real president’ Hillary Clinton for ‘eviscerating’ Trump over lie Google ‘manipulated’ millions of votes

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Hillary Clinton has been pretty quiet lately, perhaps sitting in her Chappaqua home with Bill and doing whatever it is former Secretaries of State and former Presidents do.

But a tweet President Donald Trump posted Monday move her to enter the spotlight once again, if only for a moment.

Trump posted a huge lie, a claim that somehow search and advertising behemoth Google "manipulated" up to 16 million more votes for Hillary Clinton. It's so preposterous that it's already been debunked, but don't expect a Trump retraction.

"Wow, Report Just Out! Google manipulated from 2.6 million to 16 million votes for Hillary Clinton in 2016 Election! This was put out by a Clinton supporter, not a Trump Supporter! Google should be sued. My victory was even bigger than thought!" Trump tweeted.

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Trump’s outrageous claims of voter fraud have a clear goal: Refusing to accept defeat in 2020

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A brand new Fox News poll shows Donald Trump well behind the top four Democratic candidates for president, with Joe Biden topping the list at 12 points ahead of Trump. Don’t get happy, though, or else we “tempt the wrath of whatever from high atop the thing,” to quote "The West Wing." We’re still a long way from the 2020 election and roughly a gazillion things could dramatically alter the landscape of the campaign.

Trump, on the other hand, is totally losing his shpadoinkle over the poll results.

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