The previous post showed the potential use of TreeToM to visualize ancient DNA samples in maps together with their Y-DNA phylogenetic trees. I have written Newick trees for Y-chromosome haplogroups R1b-L388 (encompassing R-V1636 and R-P297, which in turn split into R-M73 and R-M269), R1a, and N.
I have reviewed some of the BAM files from my previous bulk analyses with YLeaf v.2, to add information that I had not previously included in the All Ancient DNA Dataset, and which might be relevant to the proper depiction of phylogenetic trees; in particular, positive and negative SNPs potentially distinguishing archaic… Read the rest “Ancient phylogeography: spread of haplogroups R1b, R1a and N”
This is the fourth of four posts on the Corded Ware—Uralic identification:
Let me begin this final post on the Corded Ware—Uralic connection with an assertion that should be obvious to everyone involved in ethnolinguistic identification of prehistoric populations but, for one reason or another, is usually forgotten. In the words of David Reich, in Who We Are and How We Got … Read the rest “Corded Ware—Uralic (IV): Hg R1a and N in Finno-Ugric and Samoyedic expansions”
This is the third of four posts on the Corded Ware—Uralic identification. See
An Eastern Uralic group?
Even though proposals of an Eastern Uralic (or Ugro-Samoyedic) group are in the minority – and those who support it tend to search for an origin of Uralic in Central Asia – , there is nothing wrong in supporting this from the point of view … Read the rest “Corded Ware—Uralic (III): “Siberian ancestry” and Ugric-Samoyedic expansions”
Wang et al. (2018) is obviously a game changer in many aspects. I have already written about the upcoming Yamna Hungary samples, about the new Steppe_Eneolithic and Caucasus Eneolithic keystones, and about the upcoming Greece Neolithic samples with steppe ancestry.
An interesting aspect of the paper, hidden among so many relevant details, is a clearer picture of how the so-called Yamnaya or steppe ancestry evolved from Samara hunter-gatherers to Yamna nomadic pastoralists, and how this ancestry appeared among Proto-Corded Ware populations.
Please note: arrows of “ancestry movement” in the following PCAs do not necessarily represent physical … Read the rest ““Steppe ancestry” step by step: Khvalynsk, Sredni Stog, Repin, Yamna, Corded Ware”
Interesting new paper (behind paywall) Megalakes in the Sahara? A Review, by Quade et al. (2018).
Abstract (emphasis mine):
The Sahara was wetter and greener during multiple interglacial periods of the Quaternary, when some have suggested it featured very large (mega) lakes, ranging in surface area from 30,000 to 350,000 km2. In this paper, we review the physical and biological evidence for these large lakes, especially during the African Humid Period (AHP) 11–5 ka. Megalake systems from around the world provide a checklist of diagnostic features, such as multiple well-defined shoreline benches, wave-rounded beach gravels where coarse material is
… Read the rest “Sahara’s rather pale-green and discontinuous Sahelo-Sudanian steppe corridor, and the R1b – Afroasiatic connection”