Haplogroup B (mtDNA)

Haplogroup B
Possible time of origin	50,000 YBP
Possible place of origin	Southeastern Asia
Ancestor	R11'B
Descendants	B4, B5, B7
Defining mutations	8281-8289d

In , haplogroup B is a .

Haplogroup B is believed to have arisen in Asia some 50,000 years before present. Its ancestral haplogroup was haplogroup R.

The greatest variety of haplogroup B is in China. It is therefore likely that it underwent its earliest diversification in mainland East or South East Asia.

Haplogroup B is now most common among populations native to South East Asia, as well as speakers of the Austronesian languages.

A subclade of B4b (which is sometimes labelled B2) is one of five haplogroups found among the indigenous peoples of the Americas, the others being A, C, D, and X.

Because the migration to the Americas by the ancestors of indigenous Americans is generally believed to have been from northeastern Siberia via Beringia, it is surprising that Haplogroup B and Haplogroup X have not been found in Paleo-Siberian tribes of northeastern Siberia. However, Haplogroup B has been found among Turkic, Mongolic, and Tungusic populations of Siberia, such as Tuvans, Altays, Shors, Khakassians, Yakuts, Buryats, Khamnigans, Negidals, and Evenks. This haplogroup is also found among populations in China, Indonesia, Iran,Iraq,Japan, Korea, Laos,Madagascar, Malaysia, Melanesia, Micronesia, Mongolia, the Philippines, Polynesia, Taiwan, Thailand, Tibet, and Vietnam.

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