Revised Mathieson et al paper on 8,000 years of selection in Europe
OOPS!
I've been working on a thread about this since I got the feed, but you guys beat me to it, so I just moved my post over here.
Well, Lazaridis mentioned that the revised Mathieson paper that would contain a lot of information from his paper as well as a lot of new samples would appear in a revised preprint, and it has:
Here it is:
8000 Years of Natural Selection in Europe revised
http://www.biorxiv.org/content/biorxiv/early/2015/10/10/016477.full.pdf
I've skimmed it, but there's a lot in here, so I can't summarize much of it at this late hour.
My major takeaways that weren't already sort of telegraphed:
Anatolian farmers already carried SLC24A5, apparently, so increased frequency in Europe is because of migration.
They were 47% G2a. We'll have to wait for the Lazaridis paper for more info apparently.
They don't think it necessarily means that the migration to Europe started from Anatolia. They also don't know precisely how wide the spread was in the Near East of this particular group. However, whether the migration went by sea (Cardial) or by land (presumably into and out of the Balkans), it all came from this type of farmer.
The EEF picked up 7-11% WHG initially.
The El Mirador Cave Chalcolithic people from Spain are genetically similar to the MN Iberians and thus have more WHG than their EN predecessors, but their WHG is about the same as that of the MN Spanish (23-28%), and they have no steppe ancestry, where as people in Central Europe from this time period did have some.
The mixture of EHG and an Armenian like group began about 5200 BC, "with some individuals resembling EHG and some resembling Yamnaya". The proportion was about 74%/26%.
Yamnaya from Samara, the Afansievo people (3300-3000BC), and the Poltavka people later on (2900-2200 BC) that followed Yamnaya on the steppe are all homogeneous and are predominantly R1b (one Poltavka sample is R1a), and their Armenian like Near Eastern ancestry ranges from 48-58%, but without Anatolian like ancestry.
After Poltavka, Srubnaya became 17% Anatolian Neolithic or EEF, perhaps because mixed steppe/farmer groups from the west moved east.
Previous work (Allentoft presumably) suggested this type of ancestry went east to Sintashta by means of a Corded Ware migration.
However, according to this Lab, the fact that Srubnaya also harbored such ancestry indicates this Anatolian Neolithic or EEF ancestry could have come from a more eastern source. Further evidence that it was not Corded Ware is the fact that Srubnaya exclusively carries 4 R1a Z93 (as did one Poltavka sample).
Also very interesting is the fact that in Khvalynsk III there was R1a, R1b, and Q1a. Also, there is that one R1a in Poltavka. Therefore, the seeming shift from R1b to R1a on the steppe does not necessarily mean that new populations migrated onto the steppe. R1a might have been in Samara but not included in the rich burials associated with Yamnaya and Poltavka.
(Goodness, what a disappointment for those who were positively panting for a R1a/R1b war.
)
Also very interesting is that outside the steppe they found an individual from Karelia who was autosomally EHG but was yDna
J. That was 5500 BC, not too far from the 5200 BC and start of Armenian like appearance.
I'll leave the selection stuff until tomorrow.
Oh, and J2a1 in Barcin Neolithic.