Revised timeline and distribution of the earliest diverged human maternal lineages in southern Africa

 

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dc.contributor.author Chan, Eva K F en_ZA
dc.contributor.author Hardie, Rae-Anne en_ZA
dc.contributor.author Petersen, Desiree C en_ZA
dc.contributor.author Beeson, Karen en_ZA
dc.contributor.author Bornman, Riana M S en_ZA
dc.contributor.author Smith, Andrew B en_ZA
dc.contributor.author Hayes, Vanessa M en_ZA
dc.date.accessioned 2015-11-18T07:07:51Z
dc.date.available 2015-11-18T07:07:51Z
dc.date.issued 2015 en_ZA
dc.identifier.citation Chan, E. K., Hardie, R. A., Petersen, D. C., Beeson, K., Bornman, R. M., Smith, A. B., & Hayes, V. M. (2015). Revised timeline and distribution of the earliest diverged human maternal lineages in southern Africa. PloS one, 10(3). doi:10.1371/journal.pone.0121223 en_ZA
dc.identifier.uri http://hdl.handle.net/11427/15129
dc.identifier.uri http://dx.doi.org/10.1371/journal.pone.0121223
dc.description.abstract The oldest extant human maternal lineages include mitochondrial haplogroups L0d and L0k found in the southern African click-speaking forager peoples broadly classified as Khoesan. Profiling these early mitochondrial lineages allows for better understanding of modern human evolution. In this study, we profile 77 new early-diverged complete mitochondrial genomes and sub-classify another 105 L0d/L0k individuals from southern Africa. We use this data to refine basal phylogenetic divergence, coalescence times and Khoesan prehistory. Our results confirm L0d as the earliest diverged lineage (∼172 kya, 95%CI: 149-199 kya), followed by L0k (∼159 kya, 95%CI: 136-183 kya) and a new lineage we name L0g (∼94 kya, 95%CI: 72-116 kya). We identify two new L0d1 subclades we name L0d1d and L0d1c4/L0d1e, and estimate L0d2 and L0d1 divergence at ∼93 kya (95%CI:76-112 kya). We concur the earliest emerging L0d1’2 sublineage L0d1b (∼49 kya, 95%CI:37-58 kya) is widely distributed across southern Africa. Concomitantly, we find the most recent sublineage L0d2a (∼17 kya, 95%CI:10-27 kya) to be equally common. While we agree that lineages L0d1c and L0k1a are restricted to contemporary inland Khoesan populations, our observed predominance of L0d2a and L0d1a in non-Khoesan populations suggests a once independent coastal Khoesan prehistory. The distribution of early-diverged human maternal lineages within contemporary southern Africans suggests a rich history of human existence prior to any archaeological evidence of migration into the region. For the first time, we provide a genetic-based evidence for significant modern human evolution in southern Africa at the time of the Last Glacial Maximum at between ∼21-17 kya, coinciding with the emergence of major lineages L0d1a, L0d2b, L0d2d and L0d2a. en_ZA
dc.language.iso eng en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_ZA
dc.rights.uri http://creativecommons.org/licenses/by/4.0 en_ZA
dc.source PLoS One en_ZA
dc.source.uri http://journals.plos.org/plosone en_ZA
dc.subject.other Haplogroups en_ZA
dc.subject.other Mitochondrial DNA en_ZA
dc.subject.other Phylogenetics en_ZA
dc.subject.other Mitochondria en_ZA
dc.subject.other Africa en_ZA
dc.subject.other Namibia en_ZA
dc.subject.other Phylogenetic analysis en_ZA
dc.subject.other Language en_ZA
dc.title Revised timeline and distribution of the earliest diverged human maternal lineages in southern Africa en_ZA
dc.type Journal Article en_ZA
dc.rights.holder © 2015 Chan et al en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Archaeology en_ZA
uct.type.filetype Text
uct.type.filetype Image


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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.