Haplogroup J (mtDNA)
Haplogroup J is a human mitochondrial DNA (mtDNA) haplogroup. The clade derives from the haplogroup JT, which also gave rise to haplogroup T. In his popular book The Seven Daughters of Eve, Bryan Sykes named the originator of this mtDNA haplogroup Jasmine. Within the field of medical genetics, certain polymorphisms specific to haplogroup J have been associated with Leber's hereditary optic neuropathy.
|Possible time of origin||45,000 years before present|
|Possible place of origin||Middle East|
|Defining mutations||295 489 10398 12612 13708 16069|
Around 45,000 years before present, a mutation took place in the DNA of a woman who lived in the Near East or Caucasus. Further mutations occurred in the J line, which can be identified as the subclades J1a1,J1c1 (27,000 yrs ago), J2a (19,000 yrs ago), J2b2 (16,000 years ago), and J2b3 (5,800 yrs ago). Haplogroup J bearers along with persons carrying the T mtDNA clade settled in Europe from the Near East during the late Paleolithic and Mesolithic.
|Subclade||European coalescence time||Near East coalescence time|
|J1a1||27,300 years (± 8,000 years)||17,700 years (± 2,500 years)|
|J1a2||7,700 years (± 3,500 years)||—|
|J1b||5,000 years (± 2,200 years)||23,300 years (± 4,300 years)|
|J2a||19,200 years(± 6,900 years)||—|
|J2b1||—||15,000 years (± 5000 years)|
|J2b2||16,600* years (± 8,100 years)||16,000 years (± 5,700 years)|
|J2b3||5,800 years (± 2,900 years)||—|
*Typographical error, was 161,600 years from original source material as per time table describing the spread of populations given in the same study.
However, any statements concerning the geographic origin of this or any other haplogroup are highly speculative and considered by most population geneticists to be 'story telling' and outside the domain of science. Furthermore, inferring close associations between a haplogroup and a specific archaeological culture can be equally problematic.[by whom?]
|Subclade Alphanumeric assignation||Calculated age via empirical spread and mutational drift rate ratio|
|J2||28,259.7 ± 4,605.0 (Between 23,700 and 32,900 years old)|
|J2a||24,051.5 ± 4,183.2 (Between 19,900 and 28,200 years old)|
|J2a1||21,186.1 ± 4,485.5 (Between 16,700 and 25,700 years old)|
|J2a1a||12,986.1 ± 4,077.7 (Between 8,900 and 17,100 years old)|
|J2a1a1||8,949.8 ± 3,051.3 (Between 5,900 and 12,000 years old)|
|J2a1a1a||7,591.6 ± 2,889.6 (Between 4,700 and 10,500 years old)|
|J2a1a1a2||3,618.9 ± 2,973.9 (Between 600 and 6,600 years old)|
The average frequency of haplogroup J as a whole is today highest in the Near East (12%), followed by Europe (11%), the Caucasus (8%) and Northeast Africa (6%). Of the two main sub-groups, J1 takes up four-fifths of the total and is spread widely on the continent while J2 is more localised around the Mediterranean, Greece, Italy/Sardinia and Spain.
There is also limited evidence that the subclade J1 has long been present in Central Asia. For instance, perhaps the highest incidence of haplogroup J is the 19% of Polish Roma, who belong to J1 (although this has also been ascribed to a "founder effect" of some kind). In Pakistan, where West Eurasian lineages occur at frequencies of up to 50% in some ethno-linguistic groups, the incidence of J1 averages around 5%, while J2 is very rare. However, J2 is found amongst 9% of the Kalash minority of north-west Pakistan.
In the Arabian peninsula, mtDNA haplogroup J is found among Saudis (10.5%-18.8% J1b) and Yemenis (0%-20% J1b). The J1b subclade also occurs in the Near East among Iraqis (7.1%) and Palestinians (4%).
In Africa, haplogroup J is concentrated in the northeast. It is found among Algerians (3.23%-14.52%), as well as Copts (10.3% J1a; 10.3% J2), Sudanese Fulani (10.7% J1b), Meseria (6.7% J1b), Arakien (5.9% J1b), Egyptians (5.9%), Mozabite Berbers (3.53%), Sudanese Hausa (2.9% J1b), Zenata Berbers (2.74%), Beja (2.1% J1b), and Reguibate Sahrawi (0.93%).
Within Europe, >2% frequency distribution of mtDNA J is as follows:
- J* = Ireland — 12%, England-Wales — 11%, Scotland — 9%, Orkney — 8%, Germany — 7%, Russia (European) — 7%, Iceland — 7%, Austria-Switzerland — 5%, Finland-Estonia — 5%, Spain-Portugal — 4%, France-Italy — 3%
- J1a = Austria-Switzerland — 3%
- J1b1 = Scotland — 4%
- J2 = France-Italy — 2%
- J2a = Homogenously spread in Europe; absent in the nations around the Caucasus; not known to be found elsewhere.
- J2b1 = Virtually absent in Europe; found in diverse forms in the Near East.
- J2b1a = Found in Western Europe and Russia.
Haplogroup J has also been found among ancient Egyptian mummies excavated at the Abusir el-Meleq archaeological site in Middle Egypt, which date from the Pre-Ptolemaic/late New Kingdom, Ptolemaic, and Roman periods. Haplogroup J has been observed in ancient Guanche fossils excavated in Gran Canaria and Tenerife on the Canary Islands, which have been dardiocarbon-dated to between the 7th and 11th centuries CE. All of the clade-bearing individuals were inhumed at the Tenerife site, with one specimen found to belong to the J1c3 subclade (1/7; ~14%). The J clade has also been found among Iberomaurusian specimens dating from the Epipaleolithic at the Afalou prehistoric site. Around 22% of the observed haplotypes belonged to various J subclades, including undifferentiated J (1/9; 11%) and J1c3f (1/9; 11%).
This phylogenetic tree of haplogroup J 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 "J" P-tree|
It has been theorized[by whom?] that the uncoupling of oxidative phosphorylation related to SNPs which define mt-haplogroup J consequently produces higher body heat in the phenotype of mtDNA J individuals. This has been linked to selective pressure for the presence of the haplogroup in northern Europe, particularly Norway. Individuals from haplogroups Uk, J1c and J2 were found to be more susceptible to Leber's hereditary optic neuropathy because they have reduced oxidative phosphorylation capacity, which results in part from lower mtDNA levels. J mtDNA has also been associated with HIV infected individuals displaying accelerated progression to AIDS and death. The T150C mutation, which is exclusive to but not definitive of, the J2 subclade of Haplogroup J may be part of a likely nuclearly controlled general machinery regarding the remodeling & replication of mtDNA. Controlling a remodeling which could accelerate mtDNA replication thus compensating for oxidative damage in mtDNA as well as functional deterioration occurring with old age related to it. Haplogroup J was found to be a protective factor against ischemic cardiomyopathy. It was also found that Haplogroup J was a protective factor among osteoarthritis patients from Spain but not from UK, and this was hypothesized to be due to a different genetic composition (polymorphisms) of the Haplogroup J in both populations. A study involving patients of European and West Asian origin or descent 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.
- Mario Batali's mtdna is J1.
- Ximena Navarrete Miss Universe 2010, is haplogroup J. Quo, a pop-science magazine, states her haplogroup survived the Quaternary glaciation, whose individuals were protected from the weather in the Franco-Cantabrian region in northern Spain and southwestern France.
- Richard III of England had J1c2c3 mtDNA haplogroup.
- in Bryan Sykes' book The Seven Daughters of Eve, haplogroup J is referred to as 'Clan Jasmine'.
|Wikimedia Commons has media related to Haplogroup J (mtDNA).|
Phylogenetic tree of human mitochondrial DNA (mtDNA) haplogroups
|Mitochondrial Eve (L)|
- van Oven, Mannis; Manfred Kayser (13 Oct 2008). "Updated comprehensive phylogenetic tree of global human mitochondrial DNA variation". Human Mutation. 30 (2): E386–94. doi:10.1002/humu.20921. PMID 18853457. Archived from the original on 4 December 2012.
- Piia Serk, Human Mitochondrial DNA Haplogroup J in Europe and Near East, Thesis, Tartu 2004 Archived 2008-09-08 at the Wayback Machine
- A “Copernican” reassessment of the human mitochondrial DNA tree from its root Behar, D.M., van Oven, M., Rosset, S., Metspalu, M., Loogväli, E.L., Silva, N.M., Kivisild, T., Torroni, A. and Villems, R., American Journal of Human Genetics, Vol. 90(4), pg. 675-684, 2012
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- Bryan Sykes (2001). The Seven Daughters of Eve. London; New York: Bantam Press. ISBN 978-0393020182.
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- Schuenemann, Verena J.; et al. (2017). "Ancient Egyptian mummy genomes suggest an increase of Sub-Saharan African ancestry in post-Roman periods". Nature Communications. 8: 15694. doi:10.1038/ncomms15694. PMC 5459999. PMID 28556824.
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- Different genetic components in the Norwegian population revealed by the analysis of mtDNA & Y chromosome polymorphisms Archived 2011-09-27 at the Wayback Machine
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- A Comprehensive Analysis of mtDNA Haplogroup J (Jim Logan. September, 2008)
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- Haplogroup J
- Jim Logan's 2009 mt-Haplogroup J tree of subclades and branches by mutation
- A Comprehensive Analysis of mtDNA Haplogroup J (Jim Logan. September, 2008)
- A Refined Phylogeny for mtDNA Haplogroup J
- The Subclades of mtDNA Haplogroup J and Proposed Motifs for Assigning Control-Region Sequences into These Clades
- Map of mtHaplogroup J. (Captions in Russian/Cyrillic)
- J (& subclades) mt-Haplogroup project at FTDNA
- De Benedictis G, Rose G, Carrieri G, et al. (September 1999). "Mitochondrial DNA inherited variants are associated with successful aging and longevity in humans". FASEB J. 13 (12): 1532–6. doi:10.1096/fasebj.13.12.1532. PMID 10463944.
but male centenarians emerged in northern Italy as a particular sample: 1) mtDNA haplogroup frequency distribution was different between centenarians and younger individuals ...; and 2) the frequency of the J haplogroup was notably higher in centenarians than in younger individuals
- Niemi AK, Hervonen A, Hurme M, Karhunen PJ, Jylhä M, Majamaa K (January 2003). "Mitochondrial DNA polymorphisms associated with longevity in a Finnish population". Hum. Genet. 112 (1): 29–33. doi:10.1007/s00439-002-0843-y. PMID 12483296.
- Spread of Haplogroup J, from National Geographic
- Geographic Patterns of mtDNA Diversity in Europe, Lucia Simoni et al., 2000.
- Serk, Piia (2004). Human Mitochondrial Haplogroup J in Europe and Near East (Thesis). Tartu University. hdl:10062/777. Docket b1666485. PDF
- J mtDNA Yahoo Group File Download