Sunday , March 7 2021

Height Most likely helped Andean people to cope with Europeans

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Andes Macchu Picchu

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Andes Macchu Picchu

"data-medium-file =" "data-large- file = "" class = "aligncenter wp-image-446100 size "src =" "alt =" "width =" 1000 "height =" 661 "srcset =" 1000w, https: / / 300w, com / wp-content / uploads / 2018/11 / Andes.jpg? resize = 768% 2C508 & ssl = 1 768w, /Andes.jpg?resize=24%2C16&ssl=1 24w, 1 36w, / wp-content / upl (max-width: 1000px) 100vw, 1000px "data-recalc-Dims =" 1 "/>(CN) – Adaptation to higher levels gave people an advantage to the Andean Mountain, as most residents of the "New World" did not have the opportunity to avoid the complete removal of European colonies from a new area of ​​human genetic research.

On the ground, full of severe climates, the Andes are among the fastest freezing temperatures, ultraviolet rays and low oxygen levels. However, people fit the area thousands of years ago.

When exploring the complete genomes of ancient people in the Andes and comparing them with modern South American genetics, the research team investigated how people in the gastrointestinal tract and cardiovascular systems could adapt.

The high cardiovascular systems of high humans may have adapted to the way that blood flow to the lungs, the team ended in a study published in Science Advances.

"This is a tough, cold, natural and environmentally friendly environment with low oxygen levels," said Anna Di Rienzo of the University of Chicago, who led the research. "But the people there accommodated this habitat and agricultural lifestyle."

The group compared seven genes from the ancient Andean people and infused them into 64 genomes at high altitudes of existing populations as well as the indigenous population of Bolivia and the coast of Chile.

They hoped to analyze the impact of European migrants on indigenous populations, many of whom were almost wiped out with outsiders in the 16th century.

The team found that people living in higher climatic conditions had a much smaller population than the lower heights and had some possible explanations.

Demographic models and records show that up to 90% of downturns have been wiped out of European contact. The population living in higher regions fell by only 27 per cent.

One explanation may be genetic modifications that improve the ability to breathe oxygen-degraded air at high altitudes.

The team found evidence that the DST gene associated with myocardial tissue formation had been altered. This could have given people oxygen more efficiently.

The transition to a plant-based diet based on potatoes may also have played a role in surviving Andean.

The presence of a gene called MGAM that helps people to digest starch foods convinced the group that "a significant transition from a diet that is likely to increase meat based on one plant-based".

"The timing of the variant's appearance is completely consistent with what we know about the Paleo ethno-botanical record in the mountains," said anthropologist Mark Aldenderfer.

Potatoes from the region may have been brought home 5000 years ago, according to a recent study.

The team also noticed that modern people living in mountains have a great genetic affinity with the ancient Andes who lived in the area before European contact.

Probably, they concluded that modern humans are human-born people who survived the epidemics of smallpox and other diseases.

"The connection with Europeans had a devastating impact on the population of South America, such as the introduction of disease, war and social disorder," said John Lindo of the University of Chicago.

"By focusing on our earlier seasons, we were able to differentiate the environment from adapting to the adjustments resulting from historical events."

The research was also carried out by Ricardo Verdugo from the University of Chile.

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