The earliest interbreeding event among an ancient human population, For three years, anthropologist Alan Rogers tried to solve the puzzle of evolution. His research reveals millions of years of human evolution by analyzing DNA strands from ancient human species known as hominins.
Like many evolutionary geneticists, Rogers compared hominin genomes and looked for genetic models such as mutations and general genes.
He developed a statistical method that tells the story of ancient human populations.
A new study solves this puzzle, documenting the earliest known events between ancient human population lines, a group known in Eurasia as “extra-ancient” that interacted with Neanderthal-Denisovian ancestors about 700,000 years ago. The incident occurred between two population groups far from the other population. The earliest interbreeding event among an ancient human population.
The authors also propose a revised migration plan for people outside Africa and Eurasia.
The method of analyzing old DNA offers new opportunities to look deeper into human lines than ever before.
We never knew about this crossover episode and could never estimate the size of the superarchaic population, said the study’s lead author. We only describe intervals in the history of human evolution that were previously completely dark.
Rogers examines the way mutations are shared between contemporary Africans and Europeans, as well as old Neanderthals and citizens. The release pattern consists of five crossover episodes, including one that is still unknown. The earliest interbreeding event among an ancient human population.
Newly discovered episodes include the transition of more than 700,000 years ago between a highly connected “superarchaic” population separated from others about two million years ago and the ancestors of Neanderthals and Denisans.
The population of superarchaic and Neanderthal Denisovan ancestors is further than any other pair of human populations known to have crossed.
For example, modern humans and Neanderthals were separated for about 750,000 years when they intervened.
These results about the time at which crossing occurs in the human line shows how long it takes for reproductive isolation to develop, the researchers said.
The authors used other clues in the genome to measure when the old human population was divided and how effective their population was.
They estimate that superarkism separated in its own form some two million years ago. This is in line with human fossils in Eurasia, which are 1.85 million years old.
The researchers also suggest that there are three waves of human migration in Eurasia. The first was two million years ago when Superarchaic emigrated to Eurasia and developed into a large population. Then, 700,000 years ago, the ancestors of the Neanderthals and Denisovians emigrated to Eurasia and were quickly associated with descendants of the superarchists. The earliest interbreeding event among an ancient human population.
However, modern people developed into Eurasia 50,000 years ago, where we know that they interacted with other parents, including Neanderthals.
Researchers say: It’s great that you find different views of the data and finally find things that can’t be seen by other methods.