Haplogroup O-M268

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Haplogroup O-M268
Possible time of origin34,100 or 29,200 ybp [1]

33,181 [95% CI 36,879 <-> 24,461] ybp [2]

30,100 [95% CI 27,800 <-> 32,400] ybp [3]
Coalescence age31,108 [95% CI 34,893 <-> 22,844] ybp [2]
Possible place of origin Southeast Asia or East Asia [3]
Ancestor O1 (O-F265)
Descendants O1b1 (K18), O1b2 (P49/https://en.wikipedia.org/wiki/Draft:Haplogroup_O-M176)
Defining mutationsP31, M268, L690/F167, F256/M1341, Y9038/FGC19644, L463/F330, M1461, F138, Y9317, FGC55566, F292/M1363, CTS4164, CTS6713/M1396, CTS5785/M1377, F435/M1417, F516, M1455
Highest frequencies Austroasiatic-speaking peoples, Tai peoples, Hlai, Balinese, Javanese, Japanese, Ryukyuans, Koreans, Malagasy

In human genetics, Haplogroup O-M268, also known as O1b (formerly Haplogroup O2), is a Y-chromosome DNA haplogroup. Haplogroup O-M268 is a primary subclade of haplogroup O-F265, itself a primary descendant branch of Haplogroup O-M175.

Contents

Origin

In a paper published in 2011 by a group of Chinese researchers affiliated with Fudan University, it has been suggested that China is the origin of the expansion of haplogroup O-P31 (therein called Haplogroup O2-M268). [4]

Distribution

Haplogroup O-P31 is notable for the peculiarities of its geographical distribution. Like all clades of Haplogroup O-M175, Haplogroup O-P31 is found only among the males of modern Eastern Eurasian populations. However, Haplogroup O-P31 is generally found with high frequency only among certain populations, such as the Austroasiatic peoples of India, Bangladesh and Southeast Asia, the Nicobarese of the Nicobar Islands in the Indian Ocean, Koreans, and Japanese. Importantly, haplogroup O-P31 most contributed to Austroasiatic speakers and to Tai-Kadai speakers, but also to non-Austroasiatic rice-farming populations, migrating to Japan (that is, belonging to other lineages, than the lineages, thriving during the Last Glacial Maximum period, such as yDNA O1b2-P49, C1a-M8, D-M64).

Besides its widespread and patchy distribution, Haplogroup O1b-P31 is also notable for the fact that it can be divided into two primary subclades that show almost completely disjunct distribution: O1b1-M1304/K18 and O1b2-M176/P49. One of these subclades, O1b1-M1304/K18 (also known as O-F2320), can be mainly divided into two subclades, O1b1a1-PK4 (formerly O2a) and O1b1a2-CTS4040 (formerly O2*(xM95,M176)). O1b1a1-PK4 is found mainly among populations of Southeast Asia and some tribal populations of India (such as the Remo, Juang, and Nicobarese), but it is also common among minority ethnic groups in southern China, and it is found with low frequency throughout China as well as in Japan. O1b1a2-CTS4040 is relatively rare and mainly distributed in East Asia, especially in China, where it accounts for approximately 3.22% of the national male population. [5] The other primary subclade of Haplogroup O1b-P31, i.e. Haplogroup O1b2-M176 (formerly O2b), is found in approximately one third of present-day Japanese and Korean males and with low frequency (approximately 0.70% [6] ) in Chinese males.

Phylogenetics

Phylogenetic History

Prior to 2002, there were in academic literature at least seven naming systems for the Y-Chromosome Phylogenetic tree. This led to considerable confusion. In 2002, the major research groups came together and formed the Y-Chromosome Consortium (YCC). They published a joint paper that created a single new tree that all agreed to use. Later, a group of citizen scientists with an interest in population genetics and genetic genealogy formed a working group to create an amateur tree aiming at being above all timely. The table below brings together all of these works at the point of the landmark 2002 YCC Tree. This allows a researcher reviewing older published literature to quickly move between nomenclatures.

YCC 2002/2008 (Shorthand)(α)(β)(γ)(δ)(ε)(ζ)(η)YCC 2002 (Longhand)YCC 2005 (Longhand)YCC 2008 (Longhand)YCC 2010r (Longhand)ISOGG 2006ISOGG 2007ISOGG 2008ISOGG 2009ISOGG 2010ISOGG 2011ISOGG 2012
O-M175 26VII1U28Eu16H9IO*OOOOOOOOOO
O-M119 26VII1U32Eu16H9HO1*O1aO1aO1aO1aO1aO1aO1aO1aO1aO1a
O-M101 26VII1U32Eu16H9HO1aO1a1O1a1aO1a1aO1a1O1a1O1a1aO1a1aO1a1aO1a1aO1a1a
O-M50 26VII1U32Eu16H10HO1bO1a2O1a2O1a2O1a2O1a2O1a2O1a2O1a2O1a2O1a2
O-P3126VII1U33Eu16H5IO2*O2O2O2O2O2O2O2O2O2O2
O-M95 26VII1U34Eu16H11GO2a*O2aO2aO2aO2aO2aO2aO2aO2aO2a1O2a1
O-M88 26VII1U34Eu16H12GO2a1O2a1O2a1O2a1O2a1O2a1O2a1O2a1O2a1O2a1aO2a1a
O-SRY465 20VII1U35Eu16H5IO2b*O2bO2bO2bO2bO2bO2bO2bO2bO2bO2b
O-47z 5VII1U26Eu16H5IO2b1O2b1aO2b1O2b1O2b1aO2b1aO2b1O2b1O2b1O2b1O2b1
O-M122 26VII1U29Eu16H6LO3*O3O3O3O3O3O3O3O3O3O3
O-M121 26VII1U29Eu16H6LO3aO3aO3a1O3a1O3a1O3a1O3a1O3a1O3a1O3a1aO3a1a
O-M164 26VII1U29Eu16H6LO3bO3bO3a2O3a2O3a2O3a2O3a2O3a2O3a2O3a1bO3a1b
O-M159 13VII1U31Eu16H6LO3cO3cO3a3aO3a3aO3a3O3a3O3a3aO3a3aO3a3aO3a3aO3a3a
O-M7 26VII1U29Eu16H7LO3d*O3cO3a3bO3a3bO3a4O3a4O3a3bO3a3bO3a3bO3a2bO3a2b
O-M113 26VII1U29Eu16H7LO3d1O3c1O3a3b1O3a3b1-O3a4aO3a3b1O3a3b1O3a3b1O3a2b1O3a2b1
O-M134 26VII1U30Eu16H8LO3e*O3dO3a3cO3a3cO3a5O3a5O3a3cO3a3cO3a3cO3a2c1O3a2c1
O-M117 26VII1U30Eu16H8LO3e1*O3d1O3a3c1O3a3c1O3a5aO3a5aO3a3c1O3a3c1O3a3c1O3a2c1aO3a2c1a
O-M162 26VII1U30Eu16H8LO3e1aO3d1aO3a3c1aO3a3c1aO3a5a1O3a5a1O3a3c1aO3a3c1aO3a3c1aO3a2c1a1O3a2c1a1

Original Research Publications

The following research teams per their publications were represented in the creation of the YCC Tree.

Phylogenetic Trees

This phylogenetic tree of haplogroup O subclades is based on the YCC 2008 tree ( Karafet 2008 ) and subsequent published research.

See also

Genetics

Y-DNA O Subclades

Y-DNA Backbone Tree

Related Research Articles

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References

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  6. [/ancestry/ytree/O-P49/detail "O-P49单倍群详情"].{{cite web}}: Check |url= value (help)
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Footnotes

Works cited

Journals

Websites

Sources for conversion tables

Further reading