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Thread: Sardinian mtDNA

  1. #1
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    Sardinian mtDNA

    Sardinian mtDNA

    Along with several thousand mito-genomes I've collected from Ian Logan are 90 Sardinian mito-genomes. I think it's important to know Sardinian mtDNA is very differnt from Neolithic Central Europeans and Anatolian, and the implications this has on European mtDNA in general.

    Implications for all of Europe

    Sardinian mtDNA is dominated by H1 and H3, with nearly 50% of Sardinians having either one. If you don't count non-H1/H3 mega-lineages about 60% of Sardinians have H1/H3. Sardinians have very little K, T2b, and N1a1a, which combine took up over 50% of Early Neolithic Central European/Anatolian mtDNA.

    The high amount of H1/H3 in Sardinia and overall difference in haplogroup frequencies to EEF has implications to the rest of Europe, because it leaves room for difference in haplogroup frequency between modern/Neolithic Europeans and there still being a big chunk of EEF in all of Europe. The best way at determining whether an ancient population's mtDNA is ancestral to moderns, is subclades of haplogroups not haplogroup frequency. In this regard modern and Neolithic Europeans share a lot to the expense of all other humans.

    My opinon is that H1 and H3 derive from EEF, and ultimately Neolithic Anatolia. Of the EEFs tested for H1/H3 a pretty high frequency do have H1/H3. From Neolithic France all samples were tested, and 17% had H1 and 9% had H3. Most H samples recently coming from Neolithic North Spain have been H3 with a few being H1. Swedish Funnel Beaker individual Gok2 had H1c, a H1 clade typical of my Danish and NorthWest European(American, British) samples.

    Lack of Steppe mtDNA, some Middle Eastern mtDNA

    All of the non-H1/H3 Sardinian mtDNA falls under typical Neolithic and modern European; J1c, T2b, J2a1a1, J2b1a, U5b, and HV0, except for a few exceptions. There's two U1a1c3s with Sardinian-specfic mutations and a U6d1a. The U1a1c3 is probably from West Asia and U6d1a from NorthWest Africa.

    There is no typical Steppe mtDNA as far as I can see in Sardinia. They lack U5a, U4, T1a1, J1b1a1, H6a1a, H2a1, W6, and I. The only T1a sample from Sardinia is T1a*, while all Steppe and 90% of modern European T1a is T1a1.

    Very Different H1/H3 from other Europeans

    Sardinians share a high frequency of H1 with other Europeans and H3 with West Europeans, but the similarity ends there. The majority of Sardinian H1/H3 is H1*/H3*. They belong to undiscovered subclades. I've already had a detailed look at Danish and Basque H1/H3, and both mostly fall under discovered subclades. Furthermore Basque and Danish H1/H3 are mostly apart of differnt basal subclades. So, there's lots of diversity of H1/H3 in Europe, suggesting an old origin.
    Last edited by Krefter; 02-20-2016 at 09:46 PM.

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  3. #2
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    H1 ans H3 are also the main mtDNA lineages in Berber population of North Africa. Pretty good question is when and how did those two haplogroup spread and how did they become so dominant. Studiying those H1*H3* might be a good starter.

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