Haplogroup IJK

Haplogroup IJK is a human Y-chromosome DNA haplogroup. IJK is a primary branch of the macrohaplogroup HIJK. Its direct descendants are haplogroup IJ and haplogroup K.

Distribution and structure
IJK has not been reported in modern populations or in ancient human remains. Previously basal paragroup HIJK* was reported in a Mesolithic European (Magdalenian), GoyetQ-2, and Upper Paleolithic European (Gravettian), Vestonice16. Later study in 2023 with high quality sequencing of Magdalenian, GoyetQ-2, Gravettian, Vestonice16 were assigned with Haplogroup I.

Populations with high proportions of males who belong to descendant major haplogroups of Haplogroup HIJK live across widely dispersed areas and populations. Subclades of IJK are now concentrated in males native to:
 * Europe (e. g. haplogroups I, J, R and N);
 * the Caucasus, Near East and North East Africa (e.g. haplogroups J and T);
 * South Asia (e.g. haplogroups J, L and R);
 * East Asia，Southeast Asia, Oceania, and the Pacific (e. g. haplogroups K, M, O, P, S)
 * Northern Eurasia, (e.g. haplogroups N and Q) and;
 * Native American peoples (e. g. haplogroup Q and R).

Basic phylogeny

 * IJK
 * IJK (L15/S137, L16/S138, L69.1(=G)/S163.1)
 * IJ (M429/P125, P123, P124, P126, P127, P129, P130, S2, S22)
 * K (M9, P128, P131, P132)

Phylogenetic tree
† = A basal haplogroup that has not been documented among living individuals.

(Based on the YCC 2008 tree and subsequent published research. )

L15
The defining SNP L15 is located at Y chromosomal location rs9786139 with the ancestral value being A and the derived value being G.

L16
The defining SNP L16 is at location rs9786714 with the ancestral value being G and the derived value being A.