單倍群 O-M122（英語：Haplogroup O-M122）是人類 Y 染色體 DNA 單倍群之一，現稱 O2（舊稱 O3）， 是單倍群 O-M175 的下游單倍群之一。



起源與分布

單倍群 O-M122 於 2 萬 5 千年至 3 萬年前首次出現於東亞南部。該單倍群目前主要分佈於東亞、玻里尼西亞、東南亞、中亞、南亞等。O-M122 的主要下游單倍群包括（以下均採用 ISOGG 2017 版命名）:O2a2a-M188、O2a1b-IMS-JST002611、O2a2b1a1-M117、O2a2b1a2-F114、O2a2b2-AM01822、O2b-F742 等。其中 O2a2a-M188 主要分佈在中國南方等地，其下游的 O2a2a1a2-M7 主要分佈在苗瑤語族各族。漢族主要由 O2a1b-IMS-JST002611、O2a2b1a1-M117、O2a2b1a2-F114 三個支系組成，三者比例相仿，也常見於蒙古族科爾沁部、滿族、朝鮮族等中，M117 也常見於藏緬語族各族中，F114 還在哈薩克族乃蠻部中高頻分布。O2a2b2-AM01822 主要分佈在中國華北偏東部地區等地，其下游的 O2a2b2a2b-AM01847 是玻里尼西亞人的主要單倍群。O2b-F742 主要分佈於中國東部沿海省份等地。



注釋



參考文獻


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