Scientists have learned that the ancient Indians brought dogs from Siberia

09 Julio, 2018, 15:26 | Author: Earnest Bishop
  • Study: Ancient North American dogs were nearly wiped out after arrival of European breeds

Using genetic information from 71 archaeological dog remains from North America and Siberia, an worldwide team led by researchers at the University of Oxford, University of Cambridge, Queen Mary University of London, and Durham University showed that "native" (or "pre-contact") American dogs, which arrived alongside people over 10,000 years ago and dispersed throughout North and South America, possessed genetic signatures unlike dogs found anywhere else in the world.

As well as studying the mitochondrial DNA, researchers also sequenced the nuclear genome of seven of the ancient dogs, as reported by Gizmodo, leading them to conclude that ancient dogs which lived in huge populations all over the Americas did not survive the onslaught of the European colonizers from the 15th century onward.

According to researchers, this form of cancer is found in dogs today inhabiting the Americas, and this is the only feature which connects them with ancient American dogs who migrated from Siberia and other parts of Asia. However, after analyzing the DNA of the dogs that lived with the Indians 10 thousand years ago, experts came to the conclusion that their genetic structure mostly coincides with the individuals who lived in ancient Siberia. "We suspect that a lot of the reasons [ancient] dogs were wiped out, were similar reasons that Native American populations were destroyed", Perri said.

But one close relative of these native dogs lives on in an unexpected place - as a transmissible cancer whose genome is that of the original dog in which it appeared, but which has since spread throughout the world. They likely came over in a wave of migration only about 1,000 years ago-roughly 500 years before the Europeans arrived-meaning that they are a little more closely related.

Preserved in every single CTVT tumour is ancient DNA from the long-dead founder.

The new study dispelled a previous theory about the origin of dogs in the Americas, which posited that they evolved from domesticated wolves.

More news: Spain coach Fernando Hierro steps down following World Cup elimination
More news: Viral: Arruina gato la entrevista en vivo de un historiador
More news: Dos muertos en violenta incursión de fuerzas de Ortega en Nicaragua

To trace the story of these pre-contact dogs, researchers studied DNA found in the mitochondria of 71 North American and Siberian dog bones. Genetic traces of these dogs have largely vanished, even when we look at breeds still considered to be "native American" like Chihuahuas, Mexican hairless dogs, and South American village dogs.

"It is known how Indigenous peoples of the Americas suffered from the genocidal practices of European colonists after contact", author Ripan Malhi, an anthropology professor at the University of IL, explains. The tumor cells spread through mating and carry a copy of that original DNA, allowing researchers to paint a clear picture of the "founding dog", or patient zero.

Despite their annihilation, the displaced exacted what Perri said she and her colleagues darkly joke is "the revenge of these native American dogs".

An extremely good boy undergoing treatment for CTVT.

The oldest dog remains in the Americas date to about 9,000 years ago, many thousands of years after people began migrating over a land bridge connecting present-day Siberia and Alaska. Some ancient remains excavated decades ago and labeled wolves or coyotes might actually be from dogs or hybrids, but it will take DNA analysis to find out, she said.

"But the cancer genome we found was a real surprise", Linderholm said. Their relationship can be traced back from the earliest of times.

Recomendado:



Popular

Brasil: un juez ordenó liberar al expresidente Luiz Inácio Lula da Silva
Aún hay una petición para liberar a Lula pendiente en el máximo tribunal del país, el cual se encuentra en receso . Cientos de seguidores de Lula están reuniéndose en esa ciudad, exigiendo su libertad.

Fumar será más caro: aumentan 5% los cigarrillos
La tabacalera Massalin Particulares informó que desde mañana los precios de sus distintos marcas subirán en promedio 5%. Según este acuerdo, los cigarrillos volverían a aumentar su valor en octubre , en lo que sería la última suba del año.

Rumor: Justin Bieber y Hailey Baldwin están comprometidos?
Parece que Justin ha encontrado su amor más maduro en Hailey con quien ha vuelto a encontrar la felicidad y recuperar la sonrisa. Tú ve preparando la pamela, porque según TMZ habríamos tenido hincamiento de rodilla .

Brock Lesnar Calls Out UFC Heavyweight Champion
He finished Miocic (18-3) on the ground with 27 seconds left in the round by landing several shots before the referee stepped in. Instead, Cormier's striking made the difference and ultimately earned him the distinction of being a two-division champion.

Economy adds 31800 jobs in June, unemployment rate rises to 6.0%
According to Gallup, some 65 percent of Americans believe now is a good time to find a "quality job". Wage growth is barely keeping ahead of inflation, which is firming up as the economy strengthens.

Brexit Secretary David Davis resigns
Britons voted 52 to 48 percent to leave the E.U.in a June 2016 referendum, and the plan is to exit on March 29, 2019. Labour Party chairman Ian Lavery said: "This is absolute chaos and Theresa May has no authority left".

Pippa Middleton, pregnant, smiling, the sister of Kate shows her round belly
Kensington Palace has yet to release the guest list, but royal christenings are usually a small, family affair. According to tradition, water from the River Jordan is set to be used for Louis's christening.

Mohammad Kaif Trolled For Heaping Praise On Pakistan Team And Fakhar Zaman
But when the pair were dismissed, Australia's momentum nosedived as they managed just 6-46 from their last five overs. Aaron Finch has named Pakistan's biggest threat ahead of Australia's T20 final matchup with the World No 1 side.

Hales leads England to dramatic win over India
England lost four wickets for 46 runs before Ben Stokes (14) and Jonny Bairstow (25 off 14 balls) had a 37-run partnership. Meanwhile, MS Dhoni bagged five catches and became the only wicket-keeper in the world to as many scalps in a T20I match.

Tiger Woods and Phil Mickelson planning $10 million winner-takes-all clash
One thing is certain: If and when negotiations get completed, this will be a fun and unique experience for golf fans everywhere. And, with any luck, they'll be needling each other for decades to come.