单倍群O-M122

单倍群O-M122（英語：Haplogroup O-M122）是人类Y染色体DNA单倍群之一，现称O2（旧称O3）， 是单倍群O-M175的下游单倍群之一。 单倍群O-M122于2万5千年至3万年前首次出现于東亞南部。该单倍群目前主要分佈於东亚、玻里尼西亞、东南亞、中亚、南亚等。O-M122的主要下游单倍群包括（以下均采用ISOGG 2017版命名）:O2a2a-M188、O2a1b-IMS-JST002611、O2a2b1a1-M117、O2a2b1a2-F114、O2a2b2-AM01822、O2b-F742等。O2a2a-M188主要分布在中國偏南部、東南亞等，O2a2a1a1b2b2-MF114497主要分佈在在朝鲜半岛、日本列島等地，O2a2a1a2-M7主要分佈在苗瑶语族人群，O2a1b-IMS-JST002611、O2a2b1a1-M117、O2a2b1a2-F114是汉族主要的单倍群之一，也常见于如朝鮮族、滿族、赫哲族、锡伯族、漠南蒙古、土族等东亚民族，M117也常见于藏缅语族人群，例如緬族、彝族與藏族等，F114下游的O2a2b1a2a1a3b2a1b-Y22297在哈萨克族乃蛮部中高频分布，O2a2b2-AM01822主要分佈在中國華北偏東部、波利尼西亚、菲律賓等地，O2b-F742主要分佈於中國東部沿海省份等地。 (Shi 2009) harv error: no target: CITEREFShi2009 (help) (GenographicProject 2005) harv error: no target: CITEREFGenographicProject2005 (help) (Krahn and FTDNA 2013) Karafet, T. M.; Zegura, S. L.; Posukh, O.; Osipova, L.; Bergen, A.; Long, J.; Goldman, D.; Klitz, W.; Harihara, S.; de Knijff, P.; Wiebe, V.; Griffiths, R. C.; Templeton, A. R.; Hammer, M. F. 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Bibcode:2000PNAS...97.8225S. doi:10.1073/pnas.97.15.8225. *H6 (=O-M122(xO-M7, O-M134)) in 18/73=24.7% *H8 (=O-M134) in 2/73=2.7% for a total of 20/73=27.4% O-M122 in a pool of seven samples from Micronesia. *13/40=32.5% O-M122(xM7,M134) in a pool of three samples from Polynesia. *9/27=33.3% H6 (=O-M122(xM7,M134)) *6/27=22.2% H8 (=O-M134) for a total of 15/27=55.6% O-M122 in "Malay" sample *2/19=10.5% H6 (=O-M122(xM7,M134)) in "Kota Kinabalu" sample.  Su, Bing; Xiao, Junhua; Underhill, Peter; Deka, Ranjan; Zhang, Weiling; Akey, Joshua; Huang, Wei; Shen, Di; et al. Y-Chromosome Evidence for a Northward Migration of Modern Humans into Eastern Asia during the Last Ice Age. The American Journal of Human Genetics. 1999, 65 (6): 1718–24. PMC 1288383 . PMID 10577926. doi:10.1086/302680.  Tajima, Atsushi; Hayami, Masanori; Tokunaga, Katsushi; Juji, Takeo; Matsuo, Masafumi; Marzuki, Sangkot; Omoto, Keiichi; Horai, Satoshi. 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