慧遠(EON) 2010/02/23 23:12
John Lounsbury “Ancient Greenland Man was from Eastern Siberia”というblog記事*2を経由して、NYTのNICHOLAS WADE “Ancient Man in Greenland Has Genome Decoded”*3という記事を読む。これによれば、

The Greenlander belonged to a Paleo-Eskimo culture called the Saqqaq by archaeologists. Using his genome as a basis, a team of researchers from the University of Copenhagen determined that the Saqqaq man’s closest living relatives were the Chukchis, people who live at the easternmost tip of Siberia. His ancestors split apart from Chukchis some 5,500 years ago, according to genetic calculations, implying that the Saqqaq people’s ancestors must have traveled across the northern edges of North America until they reached Greenland.

The majority of Chukchi reside within Chukotka Autonomous Okrug, but some also reside in the neighboring Sakha Republic to the west, Magadan Oblast to the southwest, and Koryak Autonomous Okrug to the south. Some Chukchi also reside in other parts of Russia, as well as in Europe and North America. The total number of Chukchi in the world slightly exceeds 15,000.

The Saqqaq man’s genome is so complete that the Danish researchers have been able to reconstruct his probable appearance and susceptibility to disease from the genetic information in his genome. They conclude that he would have had brown eyes because of variations, at four positions along his DNA, that are associated with brown eye color in East Asians.

He has the East Asian version of a gene known as EDAR, which endows people with hair that is thicker than that of most Europeans and Africans. Another gene suggests that he would have had dry earwax, as do Asians and Native Americans, not the wet earwax of other ethnic groups.