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Western Eurasian ancestry in modern Siberians based on mitogenomic data.

Derenko M, Malyarchuk B, Denisova G, Perkova M, Litvinov A, Grzybowski T, Dambueva I, Skonieczna K, Rogalla U, Tsybovsky I, Zakharov I - BMC Evol. Biol. (2014)

Bottom Line: From a survey of 158 western Eurasian mtDNA genomes found in Siberia we estimate that nearly 40% of them most likely have western Asian and another 29% European ancestry.It is striking that 65 of northern Asian mitogenomes, i.e. ~41%, fall into 19 branches and subclades which can be considered as Siberian-specific being found so far only in Siberian populations.We have not found the modern northern Asians to have western Eurasian genetic components of sufficient antiquity to indicate traces of pre-LGM expansions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Biological Problems of the North, Russian Academy of Sciences, Magadan, Russia. mderenko@mail.ru.

ABSTRACT

Background: Although the genetic heritage of aboriginal Siberians is mostly of eastern Asian ancestry, a substantial western Eurasian component is observed in the majority of northern Asian populations. Traces of at least two migrations into southern Siberia, one from eastern Europe and the other from western Asia/the Caucasus have been detected previously in mitochondrial gene pools of modern Siberians.

Results: We report here 166 new complete mitochondrial DNA (mtDNA) sequences that allow us to expand and re-analyze the available data sets of western Eurasian lineages found in northern Asian populations, define the phylogenetic status of Siberian-specific subclades and search for links between mtDNA haplotypes/subclades and events of human migrations. From a survey of 158 western Eurasian mtDNA genomes found in Siberia we estimate that nearly 40% of them most likely have western Asian and another 29% European ancestry. It is striking that 65 of northern Asian mitogenomes, i.e. ~41%, fall into 19 branches and subclades which can be considered as Siberian-specific being found so far only in Siberian populations. From the coalescence analysis it is evident that the sequence divergence of Siberian-specific subclades was relatively small, corresponding to only 0.6-9.5 kya (using the complete mtDNA rate) and 1-6 kya (coding region rate).

Conclusions: The phylogeographic analysis implies that the western Eurasian founders, giving rise to Siberian specific subclades, may trace their ancestry only to the early and mid-Holocene, though some of genetic lineages may trace their ancestry back to the end of Last Glacial Maximum (LGM). We have not found the modern northern Asians to have western Eurasian genetic components of sufficient antiquity to indicate traces of pre-LGM expansions.

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Phylogenetic tree of haplogroup HV1a1. Designations are as in Figure 2.
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Fig3: Phylogenetic tree of haplogroup HV1a1. Designations are as in Figure 2.

Mentions: The haplogroup HV lineages comprise a number of diverse mtDNAs with overall frequency ~0.6% in the northern Asian control region data base, and eleven of them are completely sequenced to date (Additional file 5). The lineages with a potentially Near Eastern source include HV1, HV12b1 and HV13a. The Siberian-specific HV1a1a1 and HV1a1a2 mitogenomes date to 1.5-2.6 kya and nest within a cluster of Near Eastern/Caucasus HV1a1a lineages dating to 6–6.7 kya (Figure 3, Additional file 5). There are also single haplogroup HV6 and HV9 lineages with a probable European origin.Figure 3


Western Eurasian ancestry in modern Siberians based on mitogenomic data.

Derenko M, Malyarchuk B, Denisova G, Perkova M, Litvinov A, Grzybowski T, Dambueva I, Skonieczna K, Rogalla U, Tsybovsky I, Zakharov I - BMC Evol. Biol. (2014)

Phylogenetic tree of haplogroup HV1a1. Designations are as in Figure 2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4195960&req=5

Fig3: Phylogenetic tree of haplogroup HV1a1. Designations are as in Figure 2.
Mentions: The haplogroup HV lineages comprise a number of diverse mtDNAs with overall frequency ~0.6% in the northern Asian control region data base, and eleven of them are completely sequenced to date (Additional file 5). The lineages with a potentially Near Eastern source include HV1, HV12b1 and HV13a. The Siberian-specific HV1a1a1 and HV1a1a2 mitogenomes date to 1.5-2.6 kya and nest within a cluster of Near Eastern/Caucasus HV1a1a lineages dating to 6–6.7 kya (Figure 3, Additional file 5). There are also single haplogroup HV6 and HV9 lineages with a probable European origin.Figure 3

Bottom Line: From a survey of 158 western Eurasian mtDNA genomes found in Siberia we estimate that nearly 40% of them most likely have western Asian and another 29% European ancestry.It is striking that 65 of northern Asian mitogenomes, i.e. ~41%, fall into 19 branches and subclades which can be considered as Siberian-specific being found so far only in Siberian populations.We have not found the modern northern Asians to have western Eurasian genetic components of sufficient antiquity to indicate traces of pre-LGM expansions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Biological Problems of the North, Russian Academy of Sciences, Magadan, Russia. mderenko@mail.ru.

ABSTRACT

Background: Although the genetic heritage of aboriginal Siberians is mostly of eastern Asian ancestry, a substantial western Eurasian component is observed in the majority of northern Asian populations. Traces of at least two migrations into southern Siberia, one from eastern Europe and the other from western Asia/the Caucasus have been detected previously in mitochondrial gene pools of modern Siberians.

Results: We report here 166 new complete mitochondrial DNA (mtDNA) sequences that allow us to expand and re-analyze the available data sets of western Eurasian lineages found in northern Asian populations, define the phylogenetic status of Siberian-specific subclades and search for links between mtDNA haplotypes/subclades and events of human migrations. From a survey of 158 western Eurasian mtDNA genomes found in Siberia we estimate that nearly 40% of them most likely have western Asian and another 29% European ancestry. It is striking that 65 of northern Asian mitogenomes, i.e. ~41%, fall into 19 branches and subclades which can be considered as Siberian-specific being found so far only in Siberian populations. From the coalescence analysis it is evident that the sequence divergence of Siberian-specific subclades was relatively small, corresponding to only 0.6-9.5 kya (using the complete mtDNA rate) and 1-6 kya (coding region rate).

Conclusions: The phylogeographic analysis implies that the western Eurasian founders, giving rise to Siberian specific subclades, may trace their ancestry only to the early and mid-Holocene, though some of genetic lineages may trace their ancestry back to the end of Last Glacial Maximum (LGM). We have not found the modern northern Asians to have western Eurasian genetic components of sufficient antiquity to indicate traces of pre-LGM expansions.

Show MeSH
Related in: MedlinePlus