There was an earlier thread about this research. There seemed to be some confusion about what it said.
First Australasian doesn’t mean this DNA is from Australia. It means there’s a group of related people who lived during the Pleistocene in an area from China to Southeast Asia and Australia. They are a different group of people than Polynesians.
Also this paper argues against a cross Pacific migration event -
“The contribution of an unsampled population to the autochthonous gene pool is thought to have led to the origin of the Australasian shared ancestry (2). In this sense, the Y population would be part of the first colonizing groups of the American continent. However, data from ancient South American samples indicated a weak Y signal around 10,000 yBP (3). This evidence indicates that, rather than a second wave entering South America from southeast Asia, the Y ancestry might be traced back to common ancestors of Native Americans, who lived in northeast Asia. “
https://www.pnas.org/content/pnas/118/14/e2025739118.full.pdf
Thanks. Posts like that are appreciated.
from the PDF:
[snip] Our results showed that the Australasian genetic signal, previously described as exclusive to Amazonian groups, was also identified in the Pacific coastal population, pointing to a more widespread signal distribution within South America, and possibly implicating an ancient contact between Pacific and Amazonian dwellers... This genetic evidence for the presence of Y ancestry on the South American Pacific coast indicates that this ancestry likely reached this region through the Pacific coastal route, and therefore could explain absence of this genetic component in the populations of North and Central America studied so far. [/snip]
Earlier threads:
The new face of South American people [Luzia not African or Australasian]
https://www.freerepublic.com/focus/chat/3761442/posts
LUZIA - Second Oldest Human Skeleton Ever Found In The Americas
https://www.freerepublic.com/focus/news/1283339/posts
If people could travel east and land on Easter Island, why couldn’t they travel east from EI and land in South America? Also has the genetics of Easter Islanders been compared with these South Americans?