Another “Pre-Yamnaya” sample from the Northern Caucasus?

I have updated the Ancient DNA Dataset, including a lot of new information from – among other sources – the latest version of Reich Lab curated Dataset, now renamed Allen Ancient DNA Resource (AADR). This includes new columns:

Object-ID: I am now using whenever possible the Master-ID; Version-ID for a quick identification of the ‘best’ sample to include in SmartPCA or ADMIXTURE runs; and Index as a key with a unique reference number for each sample. That should make for enough stable references for any external tool to use the data.
mtDNA: Added mtDNA coverage

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IBD sharing between Corded Ware and Yamnaya-related populations

Oral communication Ancient DNA and the New Science of the Human Past by David Reich (March 3, 2021).

I noticed this interesting slide called “Caught red-handed”, at approximately 45m 17s, where David Reich asserts that sampled Corded Ware populations had many “close cousins” with Yamnaya-related populations “within generations”. The method could also be used, always according to Reich, to identify “who the Yamnaya mixed with to form groups like Corded Ware”.

NOTE. Notice also the the number of new sampled individuals from Khvalynsk, Ekaterinovka, and new Yamnaya groups from Chelyabinsk, Urals, Volga, Don, Moldova, and Romania.

This represents the … Read the rest “IBD sharing between Corded Ware and Yamnaya-related populations”

Proto-Indo-Europeans: A family business

I have been updating the Ancient DNA Dataset with date estimates published in the recent preprint by Sedig, Olalde, Patterson & Reich bioRxiv (2020), and it had a reference to some interesting new samples from Khvalynsk, showing tight family connections.

Information below is taken from the preprint and from the latest version of the Reich Lab’s Allen Ancient DNA Resource (AADR). Information about the three published Khvalynsk samples is taken from Mathieson et al. Nature (2015) supplementary materials, and each ID features a different font color in the text below for clarity’s sake.

Khvalynsk Family A

I0434, … Read the rest “Proto-Indo-Europeans: A family business”

Proto-Uralic Homeland (VII): Kinship & Numerals

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This post is part of a draft on palaeolinguistics and the Proto-Uralic homeland. See below for the color code of protoforms.

12. Kinship Terminology

12.1. Immediate Family

PU? (Saa.?, Fi.?, Md.?, Ma.?, Kh.?, Ms.?, Hu.?, Smy.?) *äććä?/*eć(ć)ä/*ić(ć)ä/*äjćä ‘father’ (UEW Nº 35). PSmy. was was borrowed into Yukaghir ečē ‘father’. Samoyedic form borrowed into Yukaghir ečē ‘father’ (Aikio 2014: 57)

NOTE. Pre-PSmy. *äjćä? could reflect an earlier Pre-PIIr. *eićo- or PIIr. *aića- ‘to control, to own’. An underlying Pre-PFi., Pre-PSaa. (based on PSaa. *e̮ćē from Skolt and Kildin Saami) and PMa. *ićä could reflect PIIr. … Read the rest “Proto-Uralic Homeland (VII): Kinship & Numerals”

Proto-Indo-European kinship system and patrilineality

Within months, it will be finally confirmed that both Late Repin offshoots – Early Yamnaya and Afanasievo – spread with clans that were dominated by R1b-L23 patrilineages. Succeeding migration events, likely coupled with internal founder effects under the most successful clans, left Indo-Tocharian-speaking clans as an almost uniform community in terms of Y-chromosome haplogroups, with their most recent common ancestor traceable to the 5^th millennium BC.

Before that, it seems that the Indo-Anatolian-speaking Early Khvalynsk community was slightly more diverse. In particular, the success of R1b-V1636 lineages is apparent in the Khvalynsk-Novodanilovka expansion, since it is … Read the rest “Proto-Indo-European kinship system and patrilineality”

Close inbreeding and low genetic diversity in Inner Asian human populations despite geographical exogamy

Open access Close inbreeding and low genetic diversity in Inner Asian human populations despite geographical exogamy, by Marchi et al. Scientific Reports (2018) 8:9397.

Abstract (emphasis mine):

When closely related individuals mate, they produce inbred offspring, which often have lower fitness than outbred ones. Geographical exogamy, by favouring matings between distant individuals, is thought to be an inbreeding avoidance mechanism; however, no data has clearly tested this prediction. Here, we took advantage of the diversity of matrimonial systems in humans to explore the impact of geographical exogamy on genetic diversity and inbreeding. We collected ethno-demographic data for 1,344 individuals

… Read the rest