| Haplogroup IJ | |
|---|---|
| Possible time of origin | 49,700–44,600 years BP[1] |
| Possible place of origin | South West Asia, Caucasus |
| 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).[2] 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 Caucasus, the Middle East (especially Arabia, 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.
Haplogroup I appears to have arisen in Europe, so far being found in Palaeolithic sites throughout Europe (Fu 2016), but not outside it. It diverged from common ancestor IJ* about 43,000 years B.P. (Karafet 2008). Early evidence for haplogroup J has been found in the Caucasus and Iran (Jones 2015, Fu 2016). In addition, living examples of the precursor Haplogroup IJ* have been found only in ethnicities living in modern day Iran. This may indicate that IJ originated in West Asia.