Haplogroup K (mtDNA)
|Possible time of origin||26,700 ± 4,300 years ago|
|Possible place of origin||Possibly West Asia|
|Defining mutations||3480 10550 11299 14798 16224 16311|
Haplogroup K appears in Central Europe, Southern Europe, Northern Europe, North Africa, the Horn of Africa, South Asia and West Asia and in populations with such an ancestry. Overall the mtDNA haplogroup K is found in about 6% of the population of Europe and the Near East, but it is more common in certain populations.
Approximately 32% of people with Ashkenazi Jewish ancestry are in haplogroup K, with about 21% in K1a1b1a alone. This high percentage points to a genetic bottleneck occurring around the years 800-1000 under which K1a1b1a was particularly affected since K1a1b1a carriers' proportions of founder alleles and pathogenic variants were higher than in carriers of other haplogroups and the K1a1b1a carriers had longer total lengths for runs of homozygosity compared to carriers of other haplogroups. Ashkenazi mtDNA K clusters into six subclades: K1a1b1*, K1a1b1a, K1a4a, K1a9, K2a*, and K2a2a1. Several of these have Middle Eastern origins. A 2013 study had suggested that K1a1b1a, K1a9, and K2a2a1 could have originated from Western Europe. However, K1a9 is shared with non-Jews in Syria and Iran and K2a2a is shared with Mizrahi Jews from the Caucasus and Muslims on the Arabian Peninsula although K2a2a1 is also in Italy and the Iberian Peninsula. K1a4a is found in Syria and Turkey but also found in non-Jewish Europeans, including Greeks and Italians. Some of these kinds of matches to K haplogroups could support the contention that some of these individual female ancestors came from a Hebrew/Levantine mtDNA pool, whose descendants lived in Europe.
In Europe, K appears to be most common in the Morbihan (17.5%) and Périgord-Limousin (15.3%) regions of France, and in Norway and Bulgaria (13.3%). The level is 12.5% in Belgium, 11% in Georgia and 10% in Austria and Great Britain. Some specific subclades of K among Europeans are K1a1b2b in Finland, K1a3a1 in Sardinia, K1a19 in Hungary, K1b1b1a in Greeks, K1b1c in Serbia, Slovakia, and Poland, K1c2 in Irish and Germans and in Hungary, and K2a9a in Sardinia.
Approximately 16% of the Druze of Syria, Lebanon, Israel, and Jordan, belong to haplogroup K. Examples of Druze branches of K are K1a5a and K1a17a. It is also found among 8% of Palestinians. Additionally, K reaches a level of 17% in Kurdistan.
Haplogroup K is also found among Gurage (10%), Syrians (9.1%), Afar (6.3%), Zenata Berbers (4.11%), Reguibate Sahrawi (3.70%), Oromo (3.3%), Iraqis (2.4%), Saudis (0%-10.5%), Yemenis (0%-9.8%), and Algerians (0%-4.3%).
Derenko et al. (2007) found haplogroup K in many samples of Iranic, Turkic, Mongolic, and Tungusic peoples of central Eurasia, including 6.8% (3/44) of a sample of Tajiks, 6.7% (6/90) of a sample of Altai Kizhi, 3.7% (3/82) of a sample of Persians, 2.7% (2/73) of a sample of West Evenks from the Krasnoyarsk region, 2.7% (3/110) of a sample of Kalmyks, 2.1% (1/47) of a sample of Mongolians, 2.0% (2/99) of a sample of Khamnigans, 1.9% (1/53) of a sample of Teleuts, 1.4% (4/295) of a sample of Buryats, and 1.2% (1/82) of a sample of Shors. Min-Sheng Peng et al. found haplogroup K1 in 10.3% (7/68) of a sample of Kyrgyz from Taxkorgan, 7.6% (5/66) of a sample of Wakhi from Taxkorgan, 5.8% (5/86) of a sample of Sarikoli from Taxkorgan, 3.7% (1/27) of a sample of Uyghur from Artux, and 2.0% (1/50) of a sample of Pamiri from Gorno-Badakhshan. In eastern China, mtDNA haplogroup K has been found in 1.3% (1/149 K1a13, 1/149 K2a5) of a sample of Barga Mongols in Hulunbuir and in 0.9% of a sample of Beijing Han.
The more ancient evidence of Haplogroup K has been found in the remains of three individuals from Upper Palaeolithic Magdalenian of Spain with 11950 years and in the Pre-Pottery Neolithic B site of Tell Ramad, Syria, dating from c. 6000 BC. The clade was also discovered in skeletons of early farmers in Central Europe dated to around 5500-5300 BC, at percentages that were nearly double the percentage present in modern Europe. Some techniques of farming, together with associated plant and animal breeds, spread into Europe from the Near East. The evidence from ancient DNA suggests that the Neolithic culture spread by human migration.
Analysis of the mtDNA of Ötzi, the frozen mummy from 3300 BC found on the Austrian-Italian border, has shown that Ötzi belongs to the K1 subclade. It cannot be categorized into any of the three modern branches of that subclade (K1a, K1b or K1c). The new subclade has provisionally been named K1ö for Ötzi. Multiplex assay study was able to confirm that the Iceman's mtDNA belongs to a new European mtDNA clade with a very limited distribution amongst modern data sets.
A lock of hair kept at a reliquary at Saint-Maximin-la-Sainte Baume basilica, France, which local tradition holds belonged to the biblical figure Mary Magdalene, was also assigned to haplogroup K. Ancient DNA sequencing of a capillary bulb bore the K1a1b1a subclade and according to the highly controversial researcher Gérard Lucotte, who claims to have discovered the DNA of Jesus Christ, it would indicate that she would have been of Pharisian maternal origin.
In 2016, researchers extracted the DNA from the tibia of two individuals separately dated to 7288-6771 BCE and 7605-7529 BCE buried in Theopetra cave, Greece, the oldest known human-made structure, and both individuals were found to belong to mtDNA Haplogroup K1c.
Thuya, the great-grandmother of Tutankhamun passed haplogroup K to her descendants, including that king. Haplogroup K has also been observed among ancient Egyptian mummies excavated at the Abusir el-Meleq archaeological site in Middle Egypt, which date from the Pre-Ptolemaic/late New Kingdom and Roman periods. Fossils excavated at the Late Neolithic site of Kelif el Boroud in Morocco, which have been dated to around 3,000 BCE, have likewise been observed to carry the K1 subclade.
This phylogenetic tree of haplogroup K subclades is based on the paper by Mannis van Oven and Manfred Kayser Updated comprehensive phylogenetic tree of global human mitochondrial DNA variation and subsequent published research.
|mtDNA HG "K" p-tree|
A study involving Caucasian patients showed that individuals classified as haplogroup J or K demonstrated a significant decrease in risk of Parkinson's disease versus individuals carrying the most common haplogroup, H.
In popular culture
On an 18 November 2005 broadcast of the Today Show, during an interview with Dr. Spencer Wells of The National Geographic Genographic Project, host Katie Couric was revealed to belong to haplogroup K.
- Genealogical DNA test
- Genetic genealogy
- Haplogroup K1a1b1a (mtDNA)
- Human mitochondrial genetics
- Population genetics
- Human mitochondrial DNA haplogroup
Phylogenetic tree of human mitochondrial DNA (mtDNA) haplogroups
|Mitochondrial Eve (L)|
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