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