Haplogroup K2

Haplogroup K2
Possible time of origin	47,000-55,000 years BP
Possible place of origin	Southeast Asia
Ancestor	K
Descendants	K2a (M2308); K2b (MPS); K2c; K2d; K2e.
Defining mutations	rs2033003 (M526)

Haplogroup K2, also known as K-M526 and formerly known as K(xLT) and MNOPS, is a human Y-DNA Haplogroup.

Relative to its age, the internal structure of K2 is extremely complex, and subclades of it are carried by males native to regions including Oceania, South East Asia, East Asia, Central Asia, the Americas, Europe, the Horn of Africa and South Asia.

The only living males reported as carrying the basal paragroup K2* (K-M526) are indigenous Australian males. Up to 27% of them may carry K2* and approximately 29% of Aboriginal Australian males belong to subclades of K2b1.

While Ust'-Ishim man, an individual who lived approximately 45,000 BP, in Siberia, was believed at one time to belong to K2*, in 2016 this was revised to NO* which is defined by the SNPs F549, M2335 and S22380.

A direct descendant of Haplogroup K, K2 is a sibling of basal/paragroup K* and Haplogroup LT (also known as K1).

Haplogroup K2 is the direct ancestral haplogroup to five primary clades (as of 2016) and many notable subclades:

At the level of highly-derived subclades, K2 is almost universal in some modern Eurasian and Native American populations. However, the only living males reported to carry the basal paragroup K2* are indigenous Australians. Major studies published in 2014 and 2015 suggest that up to 27% of Aboriginal Australian males carry K-M526* and others carry a subclade of K2: another 27% probably have K2b1a1 (P60, P304, P308; also known as "S-P308") and perhaps 2.0% have Haplogroup M1 – also known as M-M4 (or "M-M186") and K2b1d1.

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