|Time of origin||35,000-40,000 years BP|
|Place of origin||Southwest Asia|
|Descendants||L, KMNOPS, and T|
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), KMNOPS (M525), and T (M70). Haplogroups K1, K2, K3 and K4 are found only at low frequency in South Asia, the Malay Archipelago, Oceania, and Australia.
Y-DNA haplogroup K is an old lineage established approximately 40,000 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.
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.
|most recent common Y-ancestor|
It first appeared approximately 40,000 years ago in Iran or southern Central Asia. Today, haplogroup K and its descendant haplogroups are the patrilineal ancestors of most of the people living in the Northern Hemisphere, including most Europeans, Asians, and Native Americans. Other lineages derived from Haplogroup K are found among Melanesian populations, indicating an ancient link between most Eurasians and some populations of Oceania.
This haplogroup is a descendant of Haplogroup F (M89).
Its major descendant haplogroups are K2 (M70), L (M20), M (M4), NO (M214) (plus NO's descendants N and O), and P (M45) (plus P's descendants Q and R}. Haplogroups K1, K3, K4, K5, K6, and K7 are found only at low frequency among various populations of Eurasia, Oceania, and northern Africa.
Its subgroup K2 (M70) is present at a low level throughout Africa, Southwest Asia, and Southern Europe, and at a much lower level in Britain. A famous member of the K2 haplogroup is Thomas Jefferson; his Y-chromosomal complement received prominence through the Sally Hemings controversy. Haplogroup K2-M70 has been detected in 7.2% of men (10 of 139 individuals) in a sample of modern Iraqis and 10.4% (21/201) of Somalis, which is much higher than its frequency in other populations.
According to an article by N. Al-Zahery et al., the potentially paraphyletic haplogroup K*-M9(xK2, O, P) occurs at a fairly high frequency among the modern population of Turkey. However, the loci of the downstream mutations that define Haplogroup L and Haplogroup N were not tested in that study, and other studies have suggested that these two haplogroups might comprise a substantial minority of the Y-chromosome diversity among modern Anatolian populations, so it is possible that most or all of the reported K*-M9 Y-chromosomes might actually belong to Haplogroup L or Haplogroup N.
|Y-most recent common ancestor|
|This page uses content from the English language Wikipedia. The original content was at Haplogroup K (Y-DNA). The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.|