Modern humans settled in Arabia before spreading around the world

Washington, Jan 27 (ANI): A new study, which uses genetic analysis to study the earliest human migrations, suggests that when modern humans first migrated out of Africa over sixty thousand years ago, they settled in Arabia on their way to the rest of the world.

The new research, which is led by the University of Leeds and the University of Porto in Portugal, provides intriguing insight into the earliest stages of modern human migration.

"A major unanswered question regarding the dispersal of modern humans around the world concerns the geographical site of the first steps out of Africa," Dr Lu¡sa Pereira from the Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP) said.

"One popular model predicts that the early stages of the dispersal took place across the Red Sea to southern Arabia, but direct genetic evidence has been thin on the ground," Dr Pereira added.

The international research team, which included experts from across Europe, Arabia and North Africa, analysed three of the earliest non-African maternal lineages. These early branches are associated with the time period when modern humans first successfully moved out of Africa.

Using mitochondrial DNA analysis, which traces the female line of descent and is useful for comparing relatedness between different populations, the researchers compared complete genomes from Arabia and the Near East with a database of hundreds more samples from Europe. They found evidence for an ancient ancestry within Arabia.

"The timing and pattern of the migration of early modern humans has been a source of much debate and research. Our new results suggest that Arabia, rather than North Africa or the Near East, was the first staging-post in the spread of modern humans around the world," said Professor Martin Richards of the University of Leeds' Faculty of Biological Sciences.

The study was published in the American Journal of Human Genetics. (ANI)