BIMSA >
生物信息讨论班
The discussion on the Out of Africa hypothesis, OOAH and PPA (Progressive Phylogenetic Analysis), that identified the African human populations as paraphyletic
The discussion on the Out of Africa hypothesis, OOAH and PPA (Progressive Phylogenetic Analysis), that identified the African human populations as paraphyletic
组织者
演讲者
关梦岑
时间
2022年09月06日 15:00 至 15:30
地点
Online
线上
Tencent 801 3489 7723
()
摘要
The Out of Africa hypothesis, OOAH, was challenged recently in an extended mtDNA analysis, PPA (Progressive Phylogenetic Analysis), that identified the African human populations as paraphyletic, a finding that contradicted the common OOAH understanding that Hss had originated in Africa and invaded Eurasia from there. The results were consistent with the molecular Out of Eurasia hypothesis, OOEH, and Eurasian palaeontology, a subject that has been largely disregarded in the discussion of OOAH.
In the present study the mtDNA tree, a phylogeny based on maternal inheritance, was compared to the nuclear DNA tree of the paternally transmitted Y-chromosome haplotypes, Y-DNAs. The comparison showed full phylogenetic coherence between these two separate sets of data. The results were consistent with potentially four translocations of modern humans from Eurasia into Africa, the earliest taking place ≈ 250,000 years before present, YBP. The results were in accordance with the postulates behind OOEH at the same time as they lent no support to the OOAH.