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From: Ann Turner <>
Subject: [DNA] PubMed abstract: mtDNA H1 in Africa
Date: Fri, 26 Nov 2010 07:06:23 -0800


Side note: H1 is defined by a hotspot, 3010A. It is entirely possible that
this subclade actually contains multiple independent lines of descent that
are IBS (Identical by State) for 3010A. I haven't read the article yet, so I
don't know whether that's relevant for their conclusions.

=====

PLoS One. 2010 Oct 21;5(10):e13378.

Mitochondrial haplogroup H1 in north Africa: an early holocene arrival from
Iberia.

Ottoni C, Primativo G, Hooshiar Kashani B, Achilli A, Martínez-Labarga C,
Biondi G, Torroni A, Rickards O.

Department of Biology, University of Rome Tor Vergata, Rome, Italy.

The Tuareg of the Fezzan region (Libya) are characterized by an extremely
high frequency (61%) of haplogroup H1, a mitochondrial DNA (mtDNA)
haplogroup that is common in all Western European populations. To define how
and when H1 spread from Europe to North Africa up to the Central Sahara, in
Fezzan, we investigated the complete mitochondrial genomes of eleven Libyan
Tuareg belonging to H1. Coalescence time estimates suggest an arrival of the
European H1 mtDNAs at about 8,000-9,000 years ago, while phylogenetic
analyses reveal three novel H1 branches, termed H1v, H1w and H1x, which
appear to be specific for North African populations, but whose frequencies
can be extremely different even in relatively close Tuareg villages.
Overall, these findings support the scenario of an arrival of haplogroup H1
in North Africa from Iberia at the beginning of the Holocene, as a
consequence of the improvement in climate conditions after the Younger Dryas
cold snap, followed by in situ formation of local H1 sub-haplogroups. This
process of autochthonous differentiation continues in the Libyan Tuareg who,
probably due to isolation and recent founder events, are characterized by
village-specific maternal mtDNA lineages.

PMCID: PMC2958834

PMID: 20975840 [PubMed - in process]



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