To use all functions of this page, please activate cookies in your browser.
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
Haplogroup O (Y-DNA)
In human genetics, Haplogroup O (M175) is a Y-chromosome DNA haplogroup.
Additional recommended knowledge
This haplogroup appears in 80-90% of all men in East and Southeast Asia, and it is almost exclusive to that region: M175 is almost nonexistent in Western Siberia, Western Asia, and Europe and is completely absent from Africa and the Americas, although certain clades of Haplogroup O do achieve significant frequencies among some tribal populations of South Asia, Altaic-speaking populations of Central Asia, and Austronesian-speaking populations of Oceania.
Haplogroup O is a descendant haplogroup of Haplogroup NO (M214), and is believed to have first appeared in Siberia or eastern Central Asia approximately 35,000 years ago. Haplogroup O shares a node in the phylogenetic tree of human Y-chromosomes with Haplogroup N, which is common throughout North Eurasia.
Among the subbranches of Haplogroup O are Haplogroup O1, Haplogroup O2, and Haplogroup O3. Haplogroup O* lineages, which belong to Haplogroup O but do not display any of the later mutations that define the major subclades O1, O2, and O3, can still be detected at a low frequency among most modern populations of Central Asia and East Asia. For example, a broad survey of Y-chromosome variation among populations of central Eurasia found haplogroup O-M175*(xO1a-M119,O2a-M95,O3-M122) in 2.5% (one out of 40 individuals) of a sample of Tajiks in Samarkand, 4.5% (1/22) of Crimean Tatars in Uzbekistan, 1.5% (1/68) of Uzbeks in Surkhandarya, 1.4% (1/70) of Uzbeks in Khorezm, 6.3% (1/16) of Tajiks in Dushanbe, 1.9% (1/54) of Kazakhs in Kazakhstan, 4.9% (2/41) of Uyghurs in Kazakhstan, and 31.1% (14/45) of Koreans. However, approximately 30% of all Korean O*(xO1a,O2a,O3) Y-chromosomes probably belong to Haplogroup O2b, which has been found to be very common among Koreans. There is also a possibility that the so-called Haplogroup O* Y-chromosomes that have been found among these populations might belong to Haplogroup O1*(xO1a-M119), Haplogroup O2*(xO2a-M95,O2b-M176), or Haplogroup O2b-M176.
The subclades of Haplogroup O with their defining mutation, according to the 2006 ISOGG tree:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Haplogroup_O_(Y-DNA)". A list of authors is available in Wikipedia.|