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Thread: mt-D1j, the hallmark of Native America, was found in slab grave in Mongolia

  1. #21
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    Interestingly I found a Chueta sample (CHU64) which was assigned to D1j from Majorca (Balearic Islands, Spain) in this article:
    “Middle eastern genetic legacy in the paternal and maternal gene pools of Chuetas” https://www.nature.com/articles/s41598-020-78487-9#Sec1

  2. #22
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    Quote Originally Posted by Shuzam87 View Post
    Interestingly I found a Chueta sample (CHU64) which was assigned to D1j from Majorca (Balearic Islands, Spain) in this article:
    “Middle eastern genetic legacy in the paternal and maternal gene pools of Chuetas” https://www.nature.com/articles/s41598-020-78487-9#Sec1
    CHU64 D1j 16223T 16242T 16311C 16325C 16362C 73G 152C 235G 263G 309.1C 315.1C 489C

    This sample has a 16325C transition, but no C2092T, does it a real D1? @Ebizur @Megalophias

  3. #23
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    Quote Originally Posted by Howard23 View Post
    CHU64 D1j 16223T 16242T 16311C 16325C 16362C 73G 152C 235G 263G 309.1C 315.1C 489C

    This sample has a 16325C transition, but no C2092T, does it a real D1? @Ebizur @Megalophias
    Those data should be from Supplementary Table 3 ("Mitochondrial D-loop haplotypes and haplogroups of the 104 Chueta samples (EMPOP*: EMP00672), classified according to HaploGrep2 (Build 17, PhyloTree)") of J. F. Ferragut, C. Ramon, J. A. Castro, et al. (2020), "Middle eastern genetic legacy in the paternal and maternal gene pools of Chuetas," Scientific Reports (2020) 10:21428.

    In that study, only the D-loop of the mtDNA has been sequenced: "The mitochondrial DNA control region, or D-loop (16024-576), was amplified with two overlapping fragments using mtDNA-specific primers (L15997, H016 and L16555, H639)38. The amplified product was purified with the MBS Spin PCRapace kit (Invitek, Berlin, Germany), and subsequent sequencing reactions were carried out using the BigDye Terminator v3.1 Cycle Sequencing kit (Applied Biosystems), following the manufacturers’ procedures. Finally, products were run in an ABI prism 3130 analyser." (There is an exception for the mtDNA of six Chuetas whose mtDNA belonged to haplogroup R0a+60.1T: "Moreover, the entire mtDNA molecule was sequenced for six Chueta samples belonging to the modal haplogroup R0a + 60.1 T. Amplification of the whole molecule was carried out by 19 overlapping fragments, and the sequencing strategy used 31 smaller fragments, primers, and specifications as described in Ramos et al. [41,42]. When Chueta specific mutations were identified in the complete mtDNA molecule, the status of such nucleotide positions was interrogated in the rest of the samples belonging to the haplogroup.")

    The C2092T transition that marks haplogroup D1 is located outside the hypervariable regions of the D-loop of mtDNA, so that locus should not have been sequenced by the authors of the present study.

    CHU64 does exhibit 16325C (the only marker of haplogroup D1 located within the sequenced regions of mtDNA) as well as 152C, 16242T, and 16311C (every one of which is a marker of haplogroup D1j), so this individual most likely does belong to mtDNA haplogroup D1j. I suppose that this individual most likely should be a matrilineal descendant of a migrant from South America subsequent to the Iberian colonization of that continent; the sporadic occurrence of mtDNA haplogroups of American or East/Southeast Asian (e.g. Filipino) origin among present-day people in Spain and Portugal has been noted previously, and mtDNA haplogroups of African origin also have been found regularly (although with quite low frequency overall) among present-day people in those countries.

  4. The Following 3 Users Say Thank You to Ebizur For This Useful Post:

     Howard23 (05-17-2021),  Megalophias (05-17-2021),  Shuzam87 (05-17-2021)

  5. #24
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    The oldest D1j sample has now been found in sample LLP.S2.E1 at the Laguna de los Pampas site in the Argentinian Pampas during the Initial Early Holocene (calibrated date is in between 10,223–9,764) period according to the new journal “Ancient mitochondrial genomes from the Argentinian Pampas inform the early peopling of the Southern Cone of South America

    https://doi.org/10.1016/j.isci.2021.102553

  6. The Following User Says Thank You to Shuzam87 For This Useful Post:

     Howard23 (06-08-2021)

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