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New statistical method reveals surprises about our ancestry
May 23, 2008A statistical approach to studying genetic variation promises to shed new light on the history of human migration.
Scientists from the University of Oxford and University College Cork have developed a technique that analyses shared parts of chromosomes across the entire human genome. It can give much finer detail than other methods and makes it possible to delve further back in time and identify smaller genetic contributions. Application of the method has already turned up such surprising findings as a strong Mongolian contribution to the genes of the Native American Pima people and gene flow from the north of Europe to Eastern Siberia. Details are published May 23rd in the open-access journal PLoS Genetics.
Previous methods of genome analysis have either concentrated on one part of the human genome - for example, just the Y-chromosome -- or are based on "beanbag genetics" - an oversimplified model of heredity that does not fully consider chromosomal structure. The new technique described by Hellenthal and colleagues was used to analyse 2000 genetic markers using Single Nucleotide Polymorphism data from the 2006 Human Diversity Project. The researchers believe their method can cope with much larger datasets with over 500,000 genetic markers.
Further developments of the technique should allow more finely detailed reconstruction of human ancestry and give a perspective independent of anthropological theory and interpretation.
http://www.plosgenetics.org/doi/pgen.1000078
Public Library of Science
Further developments of the technique should allow more finely detailed reconstruction of human ancestry and give a perspective independent of anthropological theory and interpretation.
http://www.plosgenetics.org/doi/pgen.1000078
Public Library of Science
Human Migration Current Events and Human Migration News RSSAncestors of African Pygmies and neighboring farmers separated around 60,000 years ago
All African Pygmies, inhabiting a large territory extending west-to-east along Central Africa, descend from a unique population who lived around 20,000 years ago, according to an international study led by researchers at the Institut Pasteur in Paris.
6,000km trip to reveal clues to ancient migration
wo Durham University scientists are to play a key part in a 6000km trip following the migration route of ancient Pacific cultures.
Small islands given short shrift in assembling archaeological record
Small islands dwarf large ones in archaeological importance, says a University of Florida researcher, who found that people who settled the Caribbean before Christopher Columbus preferred more minute pieces of land because they relied heavily on the sea.
Stanford study uses genetic evidence to trace ancient African migration
Stanford University researchers peering at history's footprints on human DNA have found new evidence for how prehistoric people shared knowledge that advanced civilization.
Ancient Beachcombers May Have Travelled Slowly
New evidence, more questions. That's the thumbnail of the first new data reported in 10 years from Monte Verde, the earliest known human settlement in the Americas.
Ancient 'Out of Africa' migration left stamp on European genetic diversity, Cornell-led study finds
Human migration from Africa to Europe more than 30,000 years ago appears to have left a mark on the genes of Europeans today.
Mummy lice found in Peru may give new clues about human migration
Lice from 1,000-year-old mummies in Peru may unravel important clues about a different sort of passage: the migration patterns of America's earliest humans, a new University of Florida study suggests.
Researchers posit new ideas about human migration from Asia to Americas
Questions about human migration from Asia to the Americas have perplexed anthropologists for decades, but as scenarios about the peopling of the New World come and go, the big questions have remained.
Extraterrestrial Impact Likely Source of Sudden Ice Age Extinctions
At the end of the Pleistocene era, wooly mammoths roamed North America along with a cast of fantastic creatures - giant sloths, saber-toothed cats, camels, lions, tapirs and the incredible teratorn, a condor with a 16-foot wingspan.
Flu virus trots globe during off season
The influenza A virus does not lie dormant during summer but migrates globally and mixes with other viral strains before returning to the Northern Hemisphere as a genetically different virus, according to biologists who say the finding settles a key debate on what the virus does during the summer off season when it is not infecting people.
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Atlas of Human Migration by Russell King (Author) How the migration of people through the ages has shaped the course of history. The Atlas of Human Migration explains how humans have constantly overcome environmental and physical barriers and adapted to new social, political and environmental realities. From an estimated original 10,000 to 20,000 individuals, the world population has expanded to more than six billion. This book describes how it has spread over the world. The compelling stories of the world's peoples and their migrations through time are enhanced by informative annotated maps and informative timelines. Photographs, paintings and artifacts bring to life the history of human migration. In easy-to-understand language, a team of academic experts examines mass migrations -the motivations behind them,... |
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