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Tag: Genomic

Genomic analysis details rise, fall of the Scythians

Genomic analysis details rise, fall of the Scythians

Science
March 26 (UPI) -- The Scythians of Eurasia have long been regarded as highly mobile, horse-riding warriors. Their cultural influence on the empires with which they both clashed and traded served as testament to the broad geopolitical range of the Scythians. Despite the prolificacy of the Scythians in the historical records of the Greek, Roman, Persian and Chinese empires, however, the origins, organization and evolution of the Scythians has remained unclear. Advertisement According to a new survey of ancient Scythian genomes, the decline of more sedentary Bronze Age groups and the rise of Scythian cultures during the Iron Age followed an uptick in genetic turnover across Eurasia. Researchers sequenced 111 ancient genomes from both Scythian and non-Scythian archaeological sites across the ...
Genomic researchers detail the peopling of the Caribbean

Genomic researchers detail the peopling of the Caribbean

Science
June 5 (UPI) -- Until now, the peopling of the Caribbean -- one of the last parts of the Americas to be settled by humans -- has remained poorly understood. Thanks to new analysis of the genomes of 93 ancient Caribbean islanders, researchers are gaining new insights into Caribbean's earliest settlers. Advertisement Research into the peopling of the Caribbean has been held back by the region's hot, humid weather. "In tropical climates DNA deteriorates faster, making it more difficult to reconstruct the sequences to a degree that allows us to answer the questions we have," Kathrin Nägele, doctoral student at the Max Planck Institute for the Science of Human History in Jena, Germany, told UPI in an email. Scientists have also struggled to find funding for excavation work on the islands. "Fu...
First genomic survey of oak family reveals tree’s unique evolutionary history

First genomic survey of oak family reveals tree’s unique evolutionary history

Science
Oct. 14 (UPI) -- For the first time, scientists sequenced the genome of the entire oak family -- surveying the DNA of some 260 oak species. The undertaking revealed the unique history and relationships that define the tree's evolution over the course of 56 million years. A combination of genomic mapping and fossil data helped scientists trace the tree's diversification back through time. Their efforts could inform conservation strategies, as well as studies of other diverse tree families. "This paper demonstrates that oaks have repeatedly and globally diversified in response to ecological opportunity," Andrew Hipp, lead study author and senior scientist at the Morton Arboretum in Lisle, Illinois, said in a news release. "The changes in the global landscape have given us the gift of the o...
Genomic analysis details eastern gorilla's declining genetic health

Genomic analysis details eastern gorilla's declining genetic health

Science
Dec. 27 (UPI) -- New analysis of the critically endangered Grauer's gorilla's genome suggests the species' health is suffering from a loss of genetic diversity. Scientists sequenced the genomes of several eastern gorilla specimens collected a century ago and compared the results to the genomes of modern Grauer's gorillas. The results, published Thursday in the journal Current Biology, showed Grauer's gorillas have accumulated harmful mutations as they have lost genetic diversity. "We found that the genetic diversity in Grauer's gorilla has declined significantly in just a few generations," Tom van der Valk, a doctoral student at Uppsala University in Sweden, said in a news release. Over the last several decades, poaching and habitat losses in the Democratic Republic of the Congo have led ...