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Haplogroup JT is a human mitochondrial DNA (mtDNA) haplogroup.

Origin

Haplogroup JT is descended from the macro-haplogroup R. It is the ancestral clade to the mitochondrial haplogroups J and T.

Distribution

JT (predominantly J) was found among the ancient Etruscans. The root level haplogroup JT* has been assigned to an ancient person found at the Colfiorito necropolis in Umbria in central Italy.

The haplogroup has also been found among Iberomaurusian specimens dating from the Epipaleolithic at the Taforalt prehistoric site. One ancient individual carried a haplotype, which correlates with either the JT clade or the haplogroup H subclade H14b1 (1/9; 11%).

Subclades

Tree

This phylogenetic tree of haplogroup JT 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.

• R2'JT
  • JT
    • J
    • T

Health

Maternally inherited ancient mtDNA variants have clear impact on the presentation of disease in a modern society. Superhaplogroup JT is an example of reduced risk of Parkinson's disease And mitochondrial and mtDNa alterations continue to be promising disease biomarkers.

See also

• Genealogical DNA test
• Genetic genealogy
• Human mitochondrial genetics
• Population genetics

References

1. ^ van Oven, Mannis; Manfred Kayser (13 Oct 2008). "Updated comprehensive phylogenetic tree of global human mitochondrial DNA variation". Human Mutation. 30 (2): E386–E394. doi:10.1002/humu.20921. PMID 18853457.
2. "We Are Not Our Ancestors". Archived from the original on 2009-04-08. Retrieved 2012-02-10.
3. GenBank Accession number: MN687309.1
4. Bernard Secher; Rosa Fregel; José M Larruga; Vicente M Cabrera; Phillip Endicott; José J Pestano; Ana M González (2014). "The history of the North African mitochondrial DNA haplogroup U6 gene flow into the African, Eurasian and American continents". BMC Evolutionary Biology. 14 (1): 109. Bibcode:2014BMCEE..14..109S. doi:10.1186/1471-2148-14-109. PMC 4062890. PMID 24885141.
5. Kefi, Rym; et al. (2016). "On the origin of Iberomaurusians: new data based on ancient mitochondrial DNA and phylogenetic analysis of Afalou and Taforalt populations". Mitochondrial DNA Part A. 29 (1): 147–157. doi:10.1080/24701394.2016.1258406. PMID 28034339. S2CID 4490910.
6. Marom S, Friger M, Mishmar D (February 2017). "MtDNA meta-analysis reveals both phenotype specificity and allele heterogeneity: a model for differential association". Sci Rep. 7: 43449. doi:10.1038/srep43449. PMC 5322532. PMID 28230165.
7. Martín-Jiménez R, Lurette O, Hebert-Chatelain E (August 2020). "Damage in Mitochondrial DNA Associated with Parkinson's Disease". DNA Cell Biol. 39 (8): 1421–1430. doi:10.1089/dna.2020.5398. PMID 32397749.
8. Lowes H, Pyle A, Duddy M, Hudson G (May 2019). "Cell-free mitochondrial DNA in progressive multiple sclerosis". Mitochondrion. 46: 307–312. doi:10.1016/j.mito.2018.07.008. PMC 6509276. PMID 30098422.

External links

• General
  • Ian Logan's Mitochondrial DNA Site
  • Mannis van Oven's Phylotree

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