More Basal E* lineages found in Africa 2009 study

[beyoku]

mbe.oxfordjournals.org/cgi/content/full/26/7/1581?view=long&pmid=19369595

Genetic and Demographic Implications of the Bantu Expansion: Insights from Human Paternal Lineages

Abstract

he expansion of Bantu languages, which started around 5,000 years before present in west/central Africa and spread all throughout sub-Saharan Africa, may represent one of the major and most rapid demographic movements in the history of the human species. Although the genetic footprints of this expansion have been unmasked through the analyses of the maternally inherited mitochondrial DNA lineages, information on the genetic impact of this massive movement and on the genetic composition of pre-Bantu populations is still scarce.

Here, we analyze an extensive collection of Y-chromosome markers—41 single nucleotide polymorphisms and 18 short tandem repeats—in 883 individuals from 22 Bantu-speaking agriculturalist populations and 3 Pygmy hunter-gatherer populations from Gabon and Cameroon. Our data reveal a recent origin for most paternal lineages in west Central African populations most likely resulting from the expansion of Bantu-speaking farmers that erased the more ancient Y-chromosome diversity found in this area. However, some traces of ancient paternal lineages are observed in these populations, mainly among hunter-gatherers. These results are at odds with those obtained from mtDNA analyses, where high frequencies of ancient maternal lineages are observed, and substantial maternal gene flow from hunter-gatherers to Bantu farmers has been suggested. These differences are most likely explained by sociocultural factors such as patrilocality. We also find the intriguing presence of paternal lineages belonging to Eurasian haplogroup R1b1*, which might represent footprints of demographic expansions in central Africa not directly related to the Bantu expansion.

This study came up on a different site. Interestingly they have expansion dates for E1b1a. I would like to see expansion dates for the E1b1a found in West Africa.

Free Full Text on the Right. Supplementals too..

[djoser-xyyman]

Reading the study now. But a quick note.

I proposed about 1 year ago that E3a, E3b were probably phenotypically very similar. They are siblings. E3a originated in the East Central Sahara plains.

Although they are primarily found in West Africa it is NOT of West African origin.

The incoming E3a people met an older African population adapted to live in the forest.

This study suggest a similar premise.

This is not rocket science.

Cameroonians, carry E3a, and the so called R1b Eurasian marker, yet to the untrained eye they all look "sub-saharan".

What does that tell you?? Simply. Humans adapt to their environment. Doesn't matter the lineage.

Want more proof. Andaman Islanders. They carry the East Asian markers yet look stereotypical "negro". What does that tell you??

This is not rocket science. Three different markers (East Asian, R1b and E3a). All phenotypically similar. All seem to live in a similar environment. Conclusion?

[beyoku]

I kind if understand but you are going to need to add some detail to it.
Andaman people are YAP positive but so are some other populations that live further East.

Also regarding R1b how can we assume what that person looked like if we are under the assumption that R1 is NOT native to Africa.