Haplogroup O (Y-DNA)

Haplogroup O-M175
Possible time of origin	28,000-39,000 years BP (Scheinfeldt 2006)
Possible place of origin	Southeast or East Asia
Coalescence age	{{{TMRCA}}}
Ancestor	NO
Descendants	O-MSY2.2, O-M268, O-M122
Defining mutations	M175, P186, P191, P196

Haplogroup O-M175 is a human Y-chromosome DNA haplogroup. It is primarily found among populations in Southeast Asia and East Asia. It also is found among some populations of South Asia, Central Asia, Oceania, Madagascar, and the Comoros. The clade descends from the haplogroup NO.

Haplogroup O-M175 is a descendant haplogroup of Haplogroup NO-M214, and first appeared according to different theories, either in Southeast Asia (see Rootsi 2006, TMC & ?, Shi 2005, and Bradshaw & ?) or East Asia (see ISOGG 2012) between 28,000 and 41,000 years before present according to Scheinfeldt 2006 or between 23,000 and 32,000 years before present according to Yan et al. 2013.

Haplogroup O-M175 is one of NO-M214's two branches. The other is Haplogroup N, which is common throughout North Eurasia.

This haplogroup appears in 80-90% of most of populations in East Asia and Southeast Asia, and it is almost exclusive to that region: M175 is almost nonexistent in Western Siberia, Western Asia, Europe, most of Africa, and the Americas, where its presence may be the result of recent migrations. Certain subclades of Haplogroup O-M175 do achieve significant frequencies among some populations of South Asia, Central Asia, and Oceania. Significant presence of Haplogroup O-M50 have been found in Bantu-speaking populations of the Comoros along with a single instance of O-MSY2.2(xM50) while both O-M50 and O-M95(xM88) occur commonly among the Malagasy people of Madagascar.

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