Haplogroup IJ

Haplogroup IJ
Possible time of origin	approximately 44,400 years BP
Possible place of origin	South West Asia
Ancestor	IJK
Descendants	I, J
Defining mutations	M429/P125, P123, P124, P126, P127, P129, P130, S2, S22

Haplogroup IJ (M429/P125) is a human Y-chromosome DNA haplogroup, an immediate descendant of Haplogroup IJK (formerly known as Haplogroup F-L15). IJK is a branch of Haplogroup HIJK.

The immediate descendants of IJ are Haplogroup I and Haplogroup J. Its sole sibling is K (which includes most of the world's male population).

Haplogroup IJ derived populations account for a significant proportion of the pre-modern populations of Europe (especially Scandinavia and the Balkans), Anatolia, the Middle East (especially Arabia, The Caucasus, Levant and Mesopotamia) and coastal North Africa. As a result of mass migrations during the modern era, they are now also significant in The Americas and Australasia.

While early estimates suggested that the most recent common ancestor of haplogroup IJ could have lived 30,500 years ago, the latest estimates suggest that he lived 42,400–46,400 years before present.

Both of the primary branches of haplogroup IJ – I-M170 and J-M304 – are found among modern populations of the Caucasus, Anatolia, and Southwest Asia. This tends to suggest that Haplogroup IJ branched from IJK in West Asia and/or the Middle East.

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