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Thread: Origin and spread of mtDNA haplogroup U7

  1. #1
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    Origin and spread of mtDNA haplogroup U7

    http://www.nature.com/articles/srep46044
    Hovhannes Sahakyan et al., Origin and spread of human mitochondrial DNA haplogroup U7, Scientific Reports 7, Article number: 46044 (2017)

    Abstract

    Human mitochondrial DNA haplogroup U is among the initial maternal founders in Southwest Asia and Europe and one that best indicates matrilineal genetic continuity between late Pleistocene hunter-gatherer groups and present-day populations of Europe. While most haplogroup U subclades are older than 30 thousand years, the comparatively recent coalescence time of the extant variation of haplogroup U7 (~1619 thousand years ago) suggests that its current distribution is the consequence of more recent dispersal events, despite its wide geographical range across Europe, the Near East and South Asia. Here we report 267 new U7 mitogenomes that analysed alongside 100 published ones enable us to discern at least two distinct temporal phases of dispersal, both of which most likely emanated from the Near East. The earlier one began prior to the Holocene (~11.5 thousand years ago) towards South Asia, while the later dispersal took place more recently towards Mediterranean Europe during the Neolithic (~8 thousand years ago). These findings imply that the carriers of haplogroup U7 spread to South Asia and Europe before the suggested Bronze Age expansion of Indo-European languages from the Pontic-Caspian Steppe region.

    MtDNAU7Sahakyan2017.jpg

    Thanks to Davidski for noting this paper on his blog.
    Last edited by Jean M; 04-08-2017 at 05:23 PM.

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     Observer (04-09-2017),  parasar (04-09-2017)

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    Re U7:

    "the oldest skeletal remains of anatomically modern man (Homo sapiens) reported from the South Asian region, and dated tentatively to 37 000 YBP, were discovered from the cave site, Fahien-lena,8 on the island, with their association with the present-day Vedda people proposed on a comparative anatomical ground ... The Vedda population has the lowest proportion of shared haplotypes among their subgroups (63%) indicating their greater genetic diversity among subgroups ....
    Vedda people ...showed relatively high frequencies of haplogroup R (45.33 ... Haplogroup U was mostly found in Vedda (29.33%) and Up-country Sinhalese (23.33%), with highest contribution from sub-haplogroups U1a’c (12 and 5%,
    respectively) and U7a (13.33 and 11.67%, respectively) ... Low frequency of M haplogroup and high frequencies of R and U haplogroups were found to be the unique characteristics of Vedda ...
    There are several West Eurasian haplogroups, belonging to the HV, W, T, U1, U5 and U7 lineages, found in Sri Lankan ethnic populations ...
    The Vedda subgroups shared haplogroup R30b/R8a1a3 at relatively high frequencies ..."
    https://www.ncbi.nlm.nih.gov/pubmed/24196378


    https://www.academia.edu/12070269/HU...CIFIC_LINEAGES

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     homosapien (04-09-2017)

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    Quote Originally Posted by parasar View Post
    Re U7:

    "the oldest skeletal remains of anatomically modern man (Homo sapiens) reported from the South Asian region, and dated tentatively to 37 000 YBP, were discovered from the cave site, Fahien-lena,8 on the island[/url]
    Any information about his y-dna, mtdna or auDNA?

  6. #4
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    Quote Originally Posted by Observer View Post
    Any information about his y-dna, mtdna or auDNA?
    No.
    Also:
    "the Orsang man can be seen as the oldest Homo sapiens of the subcontinent."
    https://halshs.archives-ouvertes.fr/...73939/document

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     Observer (04-13-2017)

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