POST Online Media Lite Edition



 

Ancient DNA evidence reveals two unknown migrations from North to South America

Staff Writer |
An international research team has used genome-wide ancient DNA data to revise Central and South American history.

Article continues below




Their analysis of DNA from 49 individuals spanning about 10,000 years in Belize, Brazil, the Central Andes, and southern South America has concluded that the majority of Central and South American ancestry arrived from at least three different streams of people entering from North America, all arising from one ancestral lineage of migrants who crossed the Bering Strait some time before 15,000 years ago.

The evidence, presented November 8 in the journal Cell, shows that within this one ancestral lineage, there were two previously undocumented streams of gene flow from North to South America, one of which was later displaced in a major population replacement that began at least 9,000 years ago.

"Our work multiplied the number of ancient genomes available from these areas by about 20, giving us a much more comprehensive picture of indigenous history in the Americas," says co-senior author David Reich, a geneticist at Harvard Medical School and the Howard Hughes Medical Institute. "This broader dataset reveals a common origin of North, Central, and South Americans as well as two previously unknown genetic exchanges between North and South America."

"Nearly all Central and South Americans arose from a star-like radiation of the first lineage into at least three branches," says co-lead author Cosimo Posth, an archaeogeneticist from the Max Planck Institute for the Science of Human History.

"That means that nearly all the ancestry of Central and South Americans came from the same source population, albeit one that had already diversified prior to its spread into South America. With DNA evidence largely based on present-day people, those multiple gene flow events are undetectable, highlighting the power of ancient DNA data."

The genome analysis also yielded new insights on the Clovis culture-related people, who were mainly distributed across North America from about 13,000 years ago.

Archaeological evidence from Clovis sites shows that the spread of Clovis artefacts did not expand throughout South America.

But when the researchers used genome-sequencing technology to generate and compare genomes from a previously published ~13,000-year-old Clovis-related genome in Montana to the earliest genomes analyzed from South and Central America dating to between ~9,000 and ~11,000 years ago, they noticed significant shared ancestry. That suggested that the people who spread the Clovis culture also left a major impact much father south through people producing non-Clovis-specific stone tools.

"We weren't expecting to find a relation to people associated with the Clovis culture in South America," says co-first author Nathan Nakatsuka, a PhD student in Reich's lab at Harvard. "But it seems the expansion of the Clovis-associated lineage extended to parts of Central and South America."

The paper concludes that this Clovis-related lineage contributed substantially to a group of 9,000-10,000-year-old individuals from Lagoa Santa in Brazil, inconsistent with the hypothesis that the people from this site derived from a separate migration from Asia. The authors also detected the Clovis-related genetic affinity in an even older, almost ~11,000-year-old individual from Chile and a slightly younger, more than ~9,000-year-old individual from Belize.

Beginning around ~9,000 years ago with ancient samples in Peru, however, the authors detected an almost complete disappearance of the Clovis culture-associated ancestry in Central and South America, documenting a remarkable population replacement. The large-scale population replacement is a process that was not widely expected by archaeologists, says Reich. "This is an exciting example of how ancient DNA studies can reveal events in the past that were not confirmed and thus can stimulate new work in archaeology."

The researchers also showed that after this major population turnover, there was striking continuity compared to other parts of the world like Eurasia and Africa. "There is remarkable continuity between earlier and later skeletons with South Americans today," says Posth. "For example, modern-day Quechua and Aymara from the Central Andes can trace their ancestry back to the ancient people of the Cuncaicha site from 9,000 years ago onwards. This is a longer-standing continuity than you see in other continents."

The researchers recognize that there is much more work to do to fully flesh out the history of the Americas.

"We're very enthusiastic about the prospects for a much richer understanding of American population history, but this is still a vast region full of geographic and chronological holes," says Reich. "We'd like to collect more genetic material from earlier and later sites and from more countries, such as Colombia, Venezuela, and other parts of Brazil. We also want to examine the evolution of genetic traits over time."


What to read next

Ancient Romans visited North America long before Columbus
Two ancient populations that diverged later 'reconverged' in the Americas
Spear point study offers new explanation of how early humans settled North America

Namibia, Zambia sign deal to develop oil, gas pipeline

 
Namibia and Zambia inked an agreement in Swakopmund, Namibia, to facilitate a private sector-led infrastructure development project.
 
 

Latest

Motorola Edge 30 Ultra, a camera that you can use as a smartphone
Equinor’s first solar plant in Poland ready
Unprecedented year increases port emissions
Ukraine and North Macedonia agree to broaden free trade area

NEWS

Saudi Arabia's Border Guards rescue crew of Panamanian ship as caught on fire in Red Sea

Eight killed in Guinean gold mine landslide
Australia braces for more flooding
Hong Kong Customs seizes suspected cocaine worth about $6.2 million
U.S.: Alaska storm to bring significant coastal impacts, threat of flash flooding continues in southwest
Delaware announces potassium iodide distribution event in Middletown
 

BUSINESS

Norway inspects Europipe II subsea gas link to Germany

11 vessels with foodstuffs leave Ukrainian ports for Turkey, Spain, Greece, Romania, Algeria, Israel
Japan expected to introduce city gas use restrictions
European gas storage facilities over 90% full
Russian gas supplies through Ukraine remain at previous volume
ADB to provide up to $2.5b under flood relief support to Pakistan
 

Trending Now

Commission approves €10 billion Finnish scheme to support electricity producers

Motorola Edge 30 Ultra, a camera that you can use as a smartphone

Saudi Arabia's Border Guards rescue crew of Panamanian ship as caught on fire in Red Sea

BioVaxys executes agreement for U.S. distribution for Papilocare gel and oral Immunocaps


POLITICS

Commission approves €10 billion Finnish scheme to support electricity producers

Azerbaijan planning to increase gas supply to Europe to 18 bcm by 2027
UK government not asking people to use less energy
Ireland eyes mechanisms to protect pay-as-you-go energy customers
North Dakota joins with MN, MT and WI to develop multistate hydrogen hub
Lukashenko: Jail for anyone who raises prices or closes store
 

Today We Recommend

FAO Food Price Index drops for the sixth consecutive month


Highlights 

South Carolina: Hardeegreens establishing operations in Jasper County, will create 58 new jobs

Aldi UK to recruit 3,000 ahead of festive season

New modern aluminum welding line in Alstom’s Wroclaw site will give jobs to 100 more people


COMPANIES

Commission opens in-depth investigation into Hydro's proposed acquisition of Alumetal

Court granted a permit for deeper fairway in Port of Gothenburg
Associated British Ports and Thomas Bell sign new agreement in Immingham
Conti Seafrigo Antwerp realises new frozen food warehouse
Waters to expand its operations in Wexford, Ireland
South Carolina: Hardeegreens establishing operations in Jasper County, will create 58 new jobs
 

CAREERS

Farmers Group appoints Raul Vargas as president and CEO

Ara Partners hires Teresa O'Flynn as partner and co-lead of infrastructure strategy
Kimberly Nelson named president of Kemin Nutrisurance
Discovery Life Sciences appoints Suso J. Platero as chief scientific officer
Sandeep Johri joins LambdaTest board
Skyresponse appoints Mats Berthem as new CEO
 

ECONOMY

Pakistan witnesses over 29% surplus during 2 months in trade with U.S.

Thailand inflation drops in September
Singapore manufacturing and electronics PMIs decrease in September
New Zealand consumer confidence stable in September
New Zealand business confidence gains further ground in September
Canada's international trade drops in August
 

EARNINGS

Conagra Q1 2023 sales increased 9.5%

Helen of Troy Q2 2023 net sales revenue increased 9.7%
PwC announces record global revenues of $50 billion
AllianceBernstein's fund net assets 377,335,035
CarMax Q2 revenues $8.1 billion
Rite Aid Q2 net loss $331.3 million
 

OP-ED

Micromanaging is the worst enemy of efficiency and teamwork

Niger set to monetize massive gas reserves through Saharan natural gas pipeline
Putting the brakes on EV folly that choked the market
Oil discovery in Kavango Basin may mean huge benefits for Namibians
Cape Town and Dubai battle over Africa's energy future
Is America going to lose its superpower status?
 

AGRIFISH

FAO Food Price Index drops for the sixth consecutive month

Tennessee State Veterinarian lifts poultry restrictions
Vietnams' forestry waste products likely to rake in billions of dollars
Increase in gypsy moth activity detected in Delaware for 2022
Hong Kong suspends import of poultry meat and products from areas in Portugal, Canada and U.S.
Hong Kong suspends import of poultry meat and products from areas in UK, U.S. and Belgium
 

LEADERSHIP

Forget everything you know about hiring people

Cybervetting can have pronounced impact on workforce by broadening discrimination
Female managers pay fairer
Pitch quality of CEO voices rests entirely on gender
Employee turnover costs more than you think
51% of supply chain leaders increased number of network locations
 

CRIME

FINRA fines UBS Securities $2.5 million for regulation SHO violations and supervisory failures

Kim Kardashian to pay $1.26 million for unlawfully touting crypto security after SEC charges
SEC charges two Canadian programmers for GlobeNewswire with insider trading
Barclays agrees to $361 million settlement to resolve SEC charges relating to over-issuances of securities
Justice department announces total distribution of over $4 billion to victims of Madoff Ponzi Scheme
Bank of Ireland fined EUR100.5 million over tracker mortgage dispute
 

Magazine

TRAVEL

SureStay Hotel by Best Western Mt. Pleasant opens in Texas

Come to the astronomy capital of the world and meet the stars
All New Zealand fans of all things home and garden are welcome to Hamilton
Sanctuary Cap Cana opens in Dominican Republic
Skate with Olympic star Patrick Chan at Vancouver rinks
Annual Peanut Festival in Aubrey, Tx. is celebration of past and joy of present
 

SEA, LAND, AIR

Ford 2022 GT LM, 20 special supercars for collectors

2023 Ford F-Series Super Duty, built like never before
Caterham Super Sevens, true joy of ride
New Ford Mustang brings digital cockpit, new engines and style
Ram 1500 Limited Elite Edition joins lineup for 2023
2023 GMC Canyon AT4X, new midsize truck
 

DESIGN

Noritake tableware, to pass down to the new generation as an heirloom

Tecnografica wallcoverings from the land of ceramic
Poliform, kitchens for extraordinary homes
Luxury vinyl tiles, ideal combination of everything
LED lamps, long-lasting light for every space in your home
Clean and luxurious men's watches
 

GADGETS

Technics SL-1200, the legend keeps spinning

Leica S3, made in Germany for great pictures
Sennheiser HD 300 PROtect, pro headphones that protect your ears
HP Dragonfly Folio G3, very very good laptop for business users
Nokia PureBook Fold and PureBook Lite, flexibility and stylish design
Tascam 202MKVII, professional dual cassette deck
 

HEALTH

Mozambique reports first case of monkeypox

Decreased proteins, not amyloid plaques, tied to Alzheimer's disease
WHO probing Indian cough syrup after 66 children die in Gambia
COVID-19: New clinical study realized with Belgian supplement shows promising results against COVID-19
Lupin gets USFDA nod for HIV drug Darunavir
Roche launches its next-generation SARS-CoV-2 Rapid Antibody Test
 

MEANTIME

Nobel Peace Prize goes to human rights activists in Ukraine, Russia and Belarus

Australian researchers aim to grow plants on Moon by 2025
Wildfire causes irreparable damage to sacred Easter Island statues
Russian launches to space from U.S., first time in 20 years
Angola announces Angosat-2 satellite launch schedule
Chile announces proposal to create Desierto Florido National Park