DNA研究揭示了世界之巔一個被遺忘的人群
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1.媒體來源:
外媒 phys.org
2.記者署名:
Paul Arnold
3.完整新聞標題:
DNA studies uncover a forgotten population at the top of the world
DNA研究揭示了世界之巔一個被遺忘的人群
4.完整新聞內文:
DNA studies uncover a forgotten population at the top of the world
by Paul Arnold, Phys.org
edited by Lisa Lock, reviewed by Robert Egan
Scientists have uncovered an ancient population previously unknown to science in Ladakh, a high-altitude region in northern India. Their studies revealed individuals with a nearly perfect 50–50 mix of South Asian-related and
Tibetan-related ancestry who lived approximately 1,500 years ago.
Ancient DNA from South Asia is scarce, leaving significant gaps in our
understanding of how the region's populations formed over time. This new discovery is based on an analysis of the remains of 10 individuals excavated from Old Lady Spider Cave, an archaeological site 4,000 meters (13,100 feet) above sea level, in 2021. It lies in a region that has long connected South Asia, Tibet and Central Asia through ancient trade routes.
DNA研究揭示了世界之巔一個被遺忘的人群
作者：Paul Arnold，Phys.org
由麗莎·洛克 編輯 ，羅伯特·伊根審閱
科學家在印度北部高海拔地區拉達克發現了一個先前科學界未知的古代人群。他們的研究表明，這些人擁有近乎完美的南亞和西藏血統，比例約為50:50，生活在大約1500年前。
南亞古代DNA資料稀少，導致我們對該地區人口隨時間推移的形成過程知之甚少。這項新發現是基於對2021年從海拔4000公尺（13100英尺）的「老婦蜘蛛洞」考古遺址中挖掘出的10具遺骸的分析。該遺址位於一個長期以來透過古代貿易路線連接南亞、西藏和中亞的地區。
Decoding the bones
One of the first things the research team did was date the remains using radiocarbon dating. Then they extracted DNA from the bones and tissue and compared it with genome-wide genetic data from thousands of modern and
ancient individuals to see which populations they most closely resembled. The findings are published in the journal Science Advances.
The researchers discovered that the cave individuals shared a similar genetic profile that is extremely rare today. About half their ancestry was
genetically similar to present-day North Indians, while the other half was closely linked to ancient Tibetans.
Next, the scientists used mathematical models to probe deeper into the data, analyzing the size of the DNA fragments inherited from each population.
解讀骨骼
研究團隊首先利用放射性碳定年法測定了遺骸的年代。然後，他們從骨骼和組織中提取了DNA，並將其與數千名現代人和古代人的全基因組遺傳數據進行比較，以確定這些遺骸與哪些人群最相似。這項研究結果發表在《科學進展》（Science Advances）雜誌上。
研究人員發現，這些洞穴居民擁有如今極為罕見的相似基因組成。他們大約一半的祖先基因與現代北印度人相似，而另一半則與古代藏族人密切相關。
接下來，科學家利用數學模型對數據進行更深入的探究，分析了從每個群體繼承的 DNA片段的大小。
When different groups mix, their chunks of DNA get chopped up into smaller pieces with every new generation. By measuring the sizes of these South Asian and Tibetan DNA fragments, the models could estimate when the two populations first mixed.
The results showed that this blending process began around 2,800 years ago, roughly 1,300 years before the cave individuals lived. "Our results do not imply that the detected admixture took place in Ladakh," the study authors commented in their paper.
當不同人群混合時，他們的DNA片段會隨著每一代的更迭而被切割成更小的片段。透過測量這些南亞和西藏DNA片段的大小，模型可以估算出這兩個族群首次混合的時間。
研究結果表明，這種混血過程大約始於2800年前，比洞穴居民的居住年代早約1300年。「我們的研究結果並不意味著檢測到的混血發生在拉達克地區，」研究作者在論文中評論道。
A lost population leaves a legacy
While the findings suggest a previously unknown population, little is known about them beyond what can be gleaned from their DNA. But the DNA also shows that this ancient group didn't vanish. The researchers found evidence that they contributed ancestry to present-day Himalayan populations, including the Minero and Balti people of Ladakh.
"The Old Ladakh population did not completely disappear and instead left a legacy in present-day people."
人口的消失會留下遺產
雖然研究結果揭示了一個此前未知的族群，但除了從他們的DNA中獲得的資訊外，人們對他們知之甚少。不過，DNA也表明，這個古老的族群並沒有消失。研究人員發現，他們的祖先構成了當今喜馬拉雅山脈居民的血統，其中包括拉達克的米內羅人和巴爾蒂人。
“古拉達克人口並沒有完全消失，而是給現代人留下了遺產。”
5.完整新聞連結 (或短網址)不可用YAHOO、LINE、MSN等轉載媒體:
https://phys.org/news/2026-07-dna-uncover-forg…
6.備註:
納粹當年一直在找的純種亞特蘭提斯遺族終於挖出來了
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