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No mtDNA-population bottleneck

Mark Stoneking (1993, "Age of Human mtDNA ancestor" in "The Origin of Modern Humans and the Impact of Chronometric Dating": 100) : "There is no requirement for the human mtDNA ancestor to be a member of our species..."

Additionally, subsequent research has proven there has been no populational bottleneck in the past 2 million years:
"The patterns of mtDNA variation have previously been interpreted as evidence of rapid population growth that followed a period of small population size about 200,000 years ago (Cann, Stoneking, and Wilson 1987; Vigilant et al. 1991), and the analysis of Rogers and Harpending (1992) suggested a date of between 60,000 and 120,000 years. This historical portrait is consistent with the estimated dates of the earliest modern human fossils and has provided support for the hypothesis of a recent African origin for modern humans (Stringer and Andrews 1988). The PDHA1 polymorphisms are consistent with the African-origin portion of this hypothesis as they were found among the sequences of African origin, suggesting that African populations are more variable at this locus. However, the site frequency distributions of the nuclear genes are in conflict with the population expansion scenario. The positive D values from nuclear genes suggest that human populations were relatively large and not subject to population bottlenecks during the time that human ancestors evolved into modern form."
(Jody Hey. 1997. Mitochondrial and Nuclear Genes Present Conflicting Portraits of Human Origins. Mol. Biol. Evol. 14(2): 166-172


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