Haplogroup K (Y-DNA)

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Haplogroup K
Time of origin 35,000-40,000 years BP
Place of origin Southwest Asia
Ancestor IJK
Descendants L, M, NOP, S and T
Defining mutations M9

In human genetics, Haplogroup K (M9) is a Human Y-chromosome DNA haplogroup. This haplogroup is a descendant of Haplogroup IJK. Its major descendant haplogroups are L (M20), M (P256), NO (M214) (plus NO's descendants N and O), P (M45) (plus P's descendants Q and R), S (M230), and T (M70). Haplogroups K1, K2, K3 and K4 are found only at low frequency in South Asia, the Malay Archipelago, Oceania, and Australia.

Contents

[edit] Origins

Y-DNA haplogroup K is an old lineage established approximately 40,000 thousand years ago whose origins were probably in southwestern Asia. At present this group contains two distinct classes of subgroups: (1) major groups L to T (refer to the main tree at Y-DNA Haplogroup Tree) and (2) minor groups K* and K1 to K4 which do not have any of the SNPs defining the major groups. These groups are found at low frequencies in various parts of Africa, Eurasia, Australia and the South Pacific.[1]

[edit] Subgroups

The subclades of Haplogroup K with their defining mutation, according to Karafet et al. (2008) [2] (abbreviated for clarity to a maximum of five steps away from the root of Haplogroup K):

Note The 2008 paper made a number of changes compared to the previous 2006 ISOGG tree. The former subgroups K2 and K5 were renamed Haplogroups T and S; the old subgroups K1 and K7 were re-assigned as new subgroups M2 and M3 of a redefined Haplogroup M; and the former subgroups K3, K4 and K6 were renamed to new K1, K2 and K3.

[edit] References

  1. ^ Laura Scheinfeldt, Françoise Friedlaender, Jonathan Friedlaender, Krista Latham, George Koki, Tatyana Karafet, Michael Hammer and Joseph Lorenz, "Unexpected NRY Chromosome Variation in Northern Island Melanesia," Molecular Biology and Evolution 2006 23(8):1628-1641
  2. ^ Yali Xue, Tatiana Zerjal, Weidong Bao, Suling Zhu, Qunfang Shu, Jiujin Xu, Ruofu Du, Songbin Fu, Pu Li, Matthew E. Hurles, Huanming Yang, and Chris Tyler-Smith, "Male Demography in East Asia: A North–South Contrast in Human Population Expansion Times," Genetics 2006 April; 172(4): 2431–2439.
  3. ^ Supplementary Table 2: NRY haplogroup distribution in Han populations, from the online supplementary material for the article by Bo Wen et al., "Genetic evidence supports demic diffusion of Han culture," Nature 431, 302-305 (16 September 2004)
  4. ^ Table 1: Y-chromosome haplotype frequencies in 49 Eurasian populations, listed according to geographic region, from the article by R. Spencer Wells et al., "The Eurasian Heartland: A continental perspective on Y-chromosome diversity," Proceedings of the National Academy of Sciences of the United States of America (August 28, 2001)
  5. ^ "Y-Chromosome Evidence for Differing Ancient Demographic Histories in the Americas," Maria-Catira Bortolini et al., American Journal of Human Genetics 73:524-539, 2003

[edit] External links


Human Y-chromosome DNA (Y-DNA) haplogroups (by ethnic groups · famous haplotypes)
most recent common Y-ancestor
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A BT
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B CT
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CF DE
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C F D E
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G H IJK
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IJ K
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I J L M NOP S T
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NO P
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N O Q R
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