单倍群O-M122

单倍群O-M122
单倍群O-M122的等频率分布图
起源时间	约3万年前
共祖年代	{{{TMRCA}}}
起源地	中国或东南亚
上游单倍群	单倍群O-M175
对应突变	M122, CTS10736, CTS10753, F36, F400, F433, F471, F633, P198

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）。主要分布于东亚与东南亚， 是单倍群O-M175的下游单倍群之一。

起源与分布

单倍群O-M122于2万5千年至3万年前首次出现于东南亚。该单倍群目前遍布东亚、东南亚与中亚，也是现今东亚和东南亚最为普遍的单倍群。中国汉族中该单倍群占有超过50%的比例。O-M122的主要下游单倍群包括（以下均采用ISOGG 2019版命名）O2a1b-IMS-JST002611、O2a2b1-M134（主要包括下游的O2a2b1a-M117、O2a2b1a2a-F444等支系）、O2a2a1a2-M7等，其中汉族主要由IMS-JST002611、F444、M117三个支系组成，三者比例相仿。此外，M117也常见于藏缅语族，而M7则在苗瑶语族与南亚语系中高频分布，F444还在哈萨克族乃蛮部中高频分布。O2a2b2-AM01822是波利尼西亚人的主要单倍群。

人类Y染色体DNA单倍型类群进化树

Y染色体最近共同祖先

A

A1b

A1a-T

A1a

A2-T

A2

A3

BT

B

CT

DE

CF

D

E

C

F

G

H

IJK

IJ

K

I

J

LT

K(xLT)

L

T

M

NO

P

S

O

N

Q

R

各族群Y染色体单倍型类群 · 著名的Y染色體單倍型類群人

参考文献

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