One study found that
Haplogroup J-M172 originated in northern Iraq. In spite of the importance of this region, genetic studies on the Iraqi people are limited and generally restricted to analysis of classical markers due to Iraq's modern political instability, No significant differences in Y-DNA variation were observed among Iraqi Mesopotamian Arabs, Assyrians, or Kurds. For both mtDNA and Y-DNA variation, the large majority of the
haplogroups observed in the Iraqi population (
H,
J,
T, and
U for the mtDNA,
J-M172 and
J-M267 for the Y-DNA) are those considered to have originated in
Western Asia and to have later spread mainly in West Asia.—the oldest human civilization in the world and most ancient inhabitants of central-southern Iraq. The Iraqi-Assyrian population was found to be significantly related to other Iraqis, especially Mesopotamian Arabs, According to Dogan et al. (2017), the most prevalent lineages among north Iraqis are J1 (17.98%), R1b (12.81%), R1a (12.40%) and J2a1b (12.19%) but distributions vary according to ethnicity. 14 different haplogroups were observed in Iraqi Arabs, with the three most common being J1 (38.61%), R1a (12.87%) and T (8.91%). The high prevalence of J1 is indicative of the indigeneity of Iraqi Arabs, which is similarly observed in Marsh Arabs. Prevalence of R and J macrohaplogroups is also attributed to pre-
Last Glacial Maximum events in the Near East. Meanwhile, 15 different haplogroups were observed in Kurds, with the three most common being J2a1b (20.20%), J1 / R1a (17.17%) and E1b1b (13.13%). 10 different haplogroups were observed in Syriacs, with the three most common being R1b (30.23%), T (17.44%) and J2a1b (15.12%). 16 different haplogroups were observed in Turkmens, with the three most common being E1b1b (17.53%), J1 / J2a1b / R1a (12.37%) and G2a (10.31%). 11 different haplogroups were observed in Yazidis, with the three most common being R1b (20.79%), L (11.88%) and G2a / J2a1x J2a1b/h (10.89%). ==Languages==