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First over the years, researchers arranged the entire genome of ancient Egyptians and revealed unprecedented insights into the male ancestry who lived while the first pyramids were built.
The man whose body was found buried in a sealed clay pot of Nuweyrat, a village south of Cairo, lived between 4,500 and 4,800 years ago, making his DNA the oldest ancient Egyptian sample ever extracted. Researchers concluded that 80% of his genetic material came from ancient peoples in North Africa, and 20% dated back to people in Western Asia and the Mesopotamian region.
Their findings were published in a natural magazine on Wednesday and provide new clues to suggest that ancient cultural ties were found in an ancient Egyptian cultural ties within a fertile crescent moon, and that there were ancient cultural ties to regions that include modern Iraq (formerly known as Mesopotamia), Iran and Jordan. Scientists doubt these connections, but to date the only evidence of them was archaeological rather than genetic.
Scientists also studied the male skeleton to determine more about his identity, finding extensive evidence of hard work while living a long life.
“By stitching together all the cues of this individual’s DNA, bones and teeth, we were able to build a comprehensive photograph,” Dr. Adeline Mores Jacobs, the lead research author, said in a statement on a visit to a researcher at John Moore University, England. “We hope that future DNA samples from ancient Egypt can be expanded when this movement from West Asia begins precisely.”
Pottery and other artifacts suggest that Egyptians may trade goods and knowledge across neighbouring areas, but the research authors say that genetic evidence of how closely different differences in ancient civilizations are mixed together, as conditions such as heat and humidity quickly degrade DNA. However, the man’s body was so well preserved in the burial container that scientists were able to extract DNA from one of the skeleton teeth.
Although the findings only capture one genetic background, experts said additional research would help answer lasting questions about the ancestors of the first Egyptians who lived at the beginning of the longest-lasting civilization.
Swedish geneticist Svante Pääbo, who won the Nobel Prize in Physiology or Medicine in 2022 for his adherence to the first Neanderthal genome, made a pioneering attempt to extract and study DNA from ancient Egyptian ruins 40 years ago, but he was unable to arrange the genome. Insufficient DNA conservation has consistently resulted in impairment.
Since then, the genomes of the three ancient Egyptians have only been partially arranged by researchers. Use “target enrichment sequences” to focus on specific markers of interest in the DNA of the specimen. The bodies used in that work date back to recent times in Egyptian history, from 787 BC to AD 23.
It was the final improvements to technology over the past decade that paved the way for the authors of the new study to sequence the entire genome of ancient Egypt.
“The technique used in this study is commonly referred to as “shotgun sequences.” This means that we sequence all DNA molecules isolated from the teeth and provide coverage across the whole genome.” “Our approach means that future researchers have access to the whole genome that they have published to find additional information. This also means that there is no need to go back to this individual for additional sampling of bone and tooth material.”
The man who died during the transition between the early dynasty and the former kingdom periods of Egypt was not yet a standard practice and was not mummified prior to his burial.
“It could have been a lucky situation. Maybe they found a needle in the haystack,” Girdland-Flink said. “But I think additional genomes will be issued from ancient Egypt over the next few years, probably from individuals buried in ceramic pots.”
Although Egypt’s overall climate is hot, the area has relatively stable temperatures. This is a key factor in long-term genetic preservation, Girdland-Flink said. The climate, the clay pot used for the burial, and the rock grave it was placed on, served to prevent the man’s DNA from getting worse, he said.
For their analysis, the researchers took a small sample of the tip of one root of the man’s teeth. Girdland-Flink said that it was an excellent tool for DNA conservation, and that it analyzed cementum, a dental tissue that locks teeth into the jaw.
Of the seven DNA extracts taken from teeth, two were conserved sufficiently to sequence. Scientists then compared the ancient Egyptian genomes to those of over 3,000 modern people and 805 ancient individuals.
A chemical signal called male dental isotopes recorded information about the environment in which he grew up and the environment he consumed as a child as a child as his teeth grew. The results were consistent with childhood spending in the hot, arid climate of the Nile Valley, consuming wheat, barley, animal proteins and plants associated with Egypt.
However, 20% of male ancestors are most consistent with the old Mesopotamian genome, suggesting that at some point the movement of people to Egypt could be quite substantial flocks.
Dental anthropologist and research co-author Joel Eilish also took forensic measurements of male teeth and calaum, which best suited Western Asian individuals. Ireland is a professor in the Faculty of Bioenvironmental Sciences at John Moore University of Liverpool.
According to iOSIF Lazaridis, a researcher at the Department of Human Evolutionary Biology at Harvard University, the study offers a glimpse into important times and places where there were no samples previously. Although Lazaridis was not involved in the new research, he is conducting research on ancient DNA samples from the Eastern Mediterranean region, including Mesopotamia and the Levant, modern Syria, Lebanon, Israel, Palestinian territory, Jordan and parts of Turkey.
Researchers have long questioned whether Egyptians were indigenous or Levanting in North Africa since the beginning of dynasty civilization, Lazaridis said.
“What this sample tells us is that at such an early age, Egypt was mostly ancestral North Africans, but there was a contribution from ancestors from Mesopotamia,” Lazaridis said. “This makes perfect sense geographically.”
Lazaridis hopes it will be the beginning of more research into Egypt, saying that while mummification has helped preserve the soft tissues of mummies, he acknowledged that the chemical treatments used in the mummy process are not ideal for ancient DNA preservation.
“I think it’s now shown that extracting DNA from people from the beginning of Egyptian civilization is feasible and that Egypt’s genetic history can begin to be written,” he said.
By studying the male skeletal structure, the team was able to determine that they were just over five feet tall, between 44 and 64 years old, and were probably close to the end of that range.
Genetic analysis suggests that he has brown eyes, hair and dark skin. And his bones told another story: how much he struggled in life.
Signs of arthritis and osteoporosis were evident in his bones, but the features within the back of his skull and vertebrae indicate that he is moving forward looking down at most of his life, Ireland said. Muscle markings indicate that he had been holding his arms in front of him for a long time, carrying heavy material. His pelvic bones were also incredibly bulging. This happens when someone is sitting on a hard surface for decades. He also had quite a few signs of arthritis on his right leg.
The Irish people saw images of ancient Egypt in various professions, including pottery making, masonry, soldering, agriculture, weaving, and grasped how men spent their time.
“These cues are circumstanced, but refer to pottery, including the use of ceramic wheels that have arrived in Egypt,” Ireland said. “That being said, his higher class of burials are not usually expected of ceramicists who do not receive such treatment. Perhaps he was very skilled or successful in advancing his social status.”
Before the pottery and writing systems were shared among cultures, there were spreads of fertile crescent moons and plants and animals raised in Egypt in the 6th millennium BC. Now, the research team wonders whether human migration is part of that shift. Additional ancient genomes from Egypt, Africa, and the fertile crescent moon can provide answers about who lived where.
“This is just one part of a puzzle that is a genetic variation in humans. Each person who has lived in the past and their genome represents a unique piece of the puzzle,” Girdland-Flink said in an email. “We can never sequence everyone’s genomes, but my hope is that we can gather enough diverse samples from around the world to accurately reconstruct the important events in human history that have shaped us today.”
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