Geographical barriers, environmental challenges, and complex migration events during the peopling of Eurasia

Together with evidence from the western Asian fossil record 11, and admixture between AMHs and Neanderthals predating the main Eurasian expansion 12, our results contribute to the mounting evidence for the presence of AMHs out of Africa earlier than 75,000 years ago.

2018-05-07T15:33:07+00:00 May 6th, 2018|

Tracing the peopling of the world through genomics

Advances in the sequencing and the analysis of the genomes of both modern and ancient peoples have facilitated a number of breakthroughs in our understanding of human evolutionary history... Our interpretation of the evolutionary history and adaptation of humans is being transformed by analyses of these new genomic data.

2017-01-26T03:52:10+00:00 January 26th, 2017|

Indigenous Arabs are descendants of the earliest split from ancient Eurasian populations

The indigenous Arab genomes defined a cluster distinct from other ancestral groups, and these genomes showed clear hallmarks of an ancient out-of-Africa bottleneck.

2017-01-01T10:42:24+00:00 January 1st, 2017|

Carriers of human mitochondrial DNA macrohaplogroup M colonized India from southeastern Asia

Based also on mtDNA phylogenetic and phylogeographic grounds, some authors have proposed the coeval existence of a northern route across the Levant that brought mtDNA macrohaplogroup N to Australia. To contrast both hypothesis, here we reanalyzed the phylogeography and respective ages of mtDNA haplogroups belonging to macrohaplogroup M in different regions of Eurasia and Australasia.

2016-11-15T09:24:59+00:00 November 15th, 2016|

Estimating time to the most recent common ancestor (TMRCA): comparison and application of eight methods

Here, we chose eight popular methods for estimating TMRCA and evaluated their robustness and accuracy in correctly identifying the true TMRCA through a series of simulations that mimicked different evolutionary scenarios. We subsequently applied all eight methods to estimate the population divergence time between Southeast Asian Malays and South Asian Indians using deep whole-genome sequencing data.

2016-06-16T08:08:11+00:00 June 16th, 2016|

Ancient mtDNA sequences from the First Australians revisited

The publication in 2001 by Adcock et al., [Adcock GJ, et al., (2001) Proc Natl Acad Sci USA 98(2):537–542] in PNAS reported the recovery of short mtDNA sequences from ancient Australians, including the 42,000-y-old Mungo Man [Willandra Lakes Hominid (WLH3)]. This landmark study in human ancient DNA suggested...

2016-06-11T05:08:24+00:00 June 11th, 2016|

The Arabian Cradle: Mitochondrial Relicts of the First Steps along the Southern Route out of Africa

A major unanswered question regarding the dispersal of modern humans around the world concerns the geographical site of the first human steps outside of Africa. The southern coastal route model predicts that the early stages of the dispersal took place when people crossed the Red Sea to southern Arabia, but genetic evidence has hitherto been tenuous. We have addressed this question by analyzing

2016-07-02T14:09:56+00:00 December 31st, 2012|

Human evolution out of Africa: the role of refugia and climate change

Although an African origin of the modern human species is generally accepted, the evolutionary processes involved in the speciation, geographical spread, and eventual extinction of archaic humans outside of Africa are much debated. An additional complexity has been the recent evidence of limited interbreeding between modern humans and the Neandertals and Denisovans. Modern human migrations and int

2016-06-09T13:37:02+00:00 December 31st, 2012|

The Expansion of mtDNA Haplogroup L3 within and out of Africa

Although fossil remains show that anatomically modern humans dispersed out of Africa into the Near East ?100 to 130 ka, genetic evidence from extant populations has suggested that non-Africans descend primarily from a single successful later migration. Within the human mitochondrial DNA (mtDNA) tree, haplogroup L3 encompasses not only many sub-Saharan Africans but also all ancient non-African line

2016-07-03T16:45:47+00:00 December 31st, 2012|

Out-of-Africa, the peopling of continents and islands: tracing uniparental gene trees across the map

Genetic relationships between human groups were first studied by comparisons of relative allele frequency at multiple loci. Geographical study of detailed, highly resolved trees of single, non-recombining uniparental loci (mitochondrial DNA: mtDNA and Y chromosome/non-recombining Y: NRY), following specific lineages rather than populations, then revolutionized knowledge of the peopling of the worl

2016-06-10T08:19:40+00:00 December 31st, 2012|