The blurb seems to be about the "new" Olalde paper, which I mentioned in the thread I started about the ISBA Conference. Here is the abstract:
"O–PSM–01The genetic history of the Iberian Peninsula over the last 8000 yearsI. Olalde1, N. Rohland1, S. Mallick1,2,3, N. Patterson2, M. Allentoft4, K. Kristiansen5, K. G. Sjögren5, R. Pinhasi6, C. Lalueza-Fox7D. Reich1,2,31Harvard Medical School, Genetics, Boston, MA/United States2Broad Institute of MIT and Harvard, Cambridge, MA/United States3Howard Hughes Medical Institute, Harvard Medical School, Boston, MA/United States4University of Copenhagen, Centre for GeoGenetics, Natural History Museum, Copenhagen, Denmark5University of Gothenburg, Gothenburg, Sweden6University of Vienna, Department of Evolutionary Anthropology, Vienna, Austria7CSIC-Universitat Pompeu Fabra, Institute of Evolutionary Biology, Barcelona, SpainThe Iberian Peninsula, lying on the southwestern corner of Europe, provides an excellent opportunity to assess the final impactof population movements entering the continent from the east and to study prehistoric and historic connections with NorthAfrica. Previous studies have addressed the population history of Iberia using ancient genomes, but the final steps leading tothe formation of the modern Iberian gene pool during the last 4000 years remain largely unexplored. Here we report genomewidedata from 153 ancient individuals from Iberia, more than doubling the number of available genomes from this region andproviding the most comprehensive genetic transect of any region in the world during the last 8000 years. We find thatMesolithic hunter-gatherers dated to the last centuries before the arrival of farmers showed an increased genetic affinity tocentral European hunter-gatherers, as compared to earlier individuals. During the third millennium BCE, Iberia receivednewcomers from south and north. The presence of one individual with a North African origin in central Iberia demonstratesearly sporadic contacts across the strait of Gibraltar. Beginning ~2500 BCE, the arrival of individuals with steppe-relatedancestry had a rapid and widespread genetic impact, with Bronze Age populations deriving ~40% of their autosomal ancestryand 100% of their Y-chromosomes from these migrants. During the later Iron Age, the first genome-wide data from ancientnon-Indo-European speakers showed that they were similar to contemporaneous Indo-European speakers and derived most oftheir ancestry from the earlier Bronze Age substratum. With the exception of Basques, who remain broadly similar to Iron Agepopulations, during the last 2500 years Iberian populations were affected by additional gene-flow from the Central/EasternMediterranean region, probably associated to the Roman conquest, and from North Africa during the Moorish conquest butalso in earlier periods, probably related to the Phoenician-Punic colonization of Southern Iberia."
This isn't much different from what Reich said in his book if I remember correctly.
A 100% y line replacement seems a bit of an exaggeration given that I2a and G2a of the appropriate clades still exist in Iberia, unless they mean non-Basque Iberians perhaps?
I don't think we can really conclude how reasonable this is until we see the location and quality of the samples.
Just in general terms, the burials you're likely to find might be disproportionately those of more elite groups, so I always think it would be better to say something along the lines of....in the samples we've found to date...
If they're correct, Iberian speakers were no different from the Indo-European speakers. So, maybe in some areas they were small in number and adopted the language of the "natives"? Seems odd if there was a near wipe out of the ylines, but the Basques are odd too; it's not "that" isolated an area.
Under this scenario, the other y lines, especially a lot of the "E" and all of the "J" would have arrived later, with Carthaginians, North Africans proper, perhaps Romans?