Scientists have traced the world’s oldest DNA to mammals, dating to 1.2 million years old, a development that sheds light on how this extinct mammal adapted to the cold climate.
Up to this point, the oldest data available to date is based on a modern horse model 780-560 years ago, a study published in the journal Nature.
According to scientists, including those from the Swedish Museum of Natural History, this is the first time that DNA has been traced and verified from millions of years old.
A senior researcher Love Dalen said that this DNA is incredibly old and that the samples are a thousand times older than the remaining Vikings, and it is too early for humans and Neanderthals.
In the study, scientists analyzed the genome from three ancient mammoths, using DNA found on dental implants that had been buried 0.7-1.2 million years in the Siberian permafrost.
Findings from a new study revealed that the Columbia mammoth that lived in North America during the last snow was a combination between the woolly mammoth species and the previously unknown genealogy.
Scientists say that there were no fur or Colombian carcasses about a million years ago as they had not changed.
This was the time of their predecessor, the ancient steppe mammoth, to add.
According to current research, scientists have suggested that the oldest specimen, about 1.2 million years old, was not a genetic mammoth.
They refer to this as the Krestovka mammoth, based on its location, and added that it differs from other Siberian mammoths more than two million years ago.
Lead author Tom van der Valk said that this is a complete surprise. All previous studies have shown that there was only one species of the mammoth that was in Siberia during that time and that was called steppe mammoth.
He added saying that but their DNA analysis now shows that there were two different generations of genes, which they here call Adycha mammoth and Krestovka mammoth. They can’t say for sure yet, but they think this could represent two different species.
According to scientists, it was the mammoths that were part of the Krestovka genealogy that covered North America some 1.5 million years ago.
They now believe that the Columbian mammoth, which lived in North America during the last snowy season, was a hybrid.
Studies have shown that about half of these genom mammoth hybrids come from the Krestovka genealogy and the other half from the sour furry animal.
Lead author Patricia Pecnerova said that this is an important discovery. Columbian mammoth which is one of the most prominent Ice Age species in North America, appears to have evolved from a mixture that occurred about 420 thousand years ago.
When scientists analyzed another mammoth DNA sample for millions of years, they discovered that genetic variants in Arctic health, such as hair growth, thermoregulation, deposit deposits, cold tolerance and circadian rhythm, were already present before the onset of the hairy lump. .
According to researchers, these results show that most of the major genealogies occur gradually over time.
He also said that the ability to track genetic mutations in a specific speciation event is different. He also said that their analysis shows that most of the cold adaptation already existed in the woolly mammoth ancestor, and we do not find evidence that natural selection was too rapid during the recommendation process.
Scientists believe that the techniques used in research could be used to further the understanding of processes that drive long-term clarification and evolution.