The study collected mtDNA from about 600 Jews and non-Jews from around the world, including 78 Ashkenazic Jews and Georgians, Uzbeks, Germans, Berbers, Ethiopians, Arabs, etc. 17.9% of sampled Iraqi Jews have an mtDNA pattern known as U3, compared to 2.6% of Ashkenazic Jews, 0.9% of Moroccan Jews, 1.7% of ethnic Berbers, 1.1% of ethnic Germans, 0.0% of Iranian Jews, 0.0% of Georgian Jews, 0.0% of Bukharian Jews, 0.0% of Yemenite Jews, 0.0% of Ethiopian Jews, 0.0% of Indian Jews, 0.0% of Syrian Arabs, 0.0% of Georgians, 0.0% of Uzbeks, 0.0% of Yemeni Arabs, 0.0% of Ethiopians, 0.0% of Asian Indians, 0.0% of Israeli Arabs. (According to Vincent Macaulay, U3 is found also among some Turks, Iraqis, Caucasus tribes, Alpine Europeans, North Central Europeans, Kurds, Azerbaijanis, Eastern Mediterranean Europeans, Central Mediterranean Europeans, Western Mediterranean Europeans, and southeastern Europeans.) Another pattern, called Haplotype I, was found among 12.1% of Bukharan Jews, 2.6% of Ashkenazic Jews, 1.8% of Iraqi Jews, 1.3% of Iranian Jews, 1.1% of ethnic Germans, and 2.4% of ethnic Asian Indians, and none of the other groups among individuals tested. (According to Vincent Macaulay, Haplotype I is found also among some Northeastern Europeans, North Central Europeans, Caucasus tribes, Northwestern Europeans, and Scandinavians.) Yet another pattern, called Haplotype J1, was found among 12.5% of Iraqi Jews, 2.7% of Iranian Jews, 9.2% of Yemenite Jews, and 1.7% of Israeli Arabs, and none of the other groups among individuals tested. (According to Vincent Macaulay, Haplotype J1 is found also among some Iraqi Arabs, Bedouins, Palestinian Arabs, and Azerbaijanis.)

http://en.wikipedia.org/wiki/Haplogroup_R1b_(Y-DNA)