in the case of Western Europe, we have: highest absolute %s of Y-R1b around Basque Country -(and Western Ireland, Brittany), highest % of whole-S116 in the same places - highest relative % of S116*/whole-S116 (derived) in Western Europe, the most in Ireland and around Basque Country –highest absolute % of DF27 in Basque Country decreasing by distance, but faster in West than in East – Discussion: a higher % of S116*/whole-S116 could be the signal of population being remained in little number for a while, so possibly having received its Y-R1b from other sources: but the huge and higher absolute % of DF27 and whole-R1b compared to other excludes for me that Basque Country was in debt to an other population for it – the relative % DF27/S116 of Basque Country is strong but not very higher than in Portugal, Andalusia and Madrid, and it is lower among “true” Basques than among “false Basques”! could it signify DF27 came from the periphery or immigrants in Basque Country? It could at the contrary signify that Basques or a population akin to Basques (because the unity overspanning the Pyrenees is evident, and corresponding in some part to Historic links), remained in a small enough number for a while at a S116* level, underwent a “baby boom” (at least concerning male chromosomes) producing after mutations a DF27 dynamic source; the surroundings populations, with less absolute % of DF27 but more relative DF27/S116, are rather the tributary ones to Basque nucleus because transmission(S) of high DF 27-plus low S116* explains the loss of the few S116* - there is a relative continuity in Iberia concerning DF27 and Y-R1b as a whole, spite local variations – at first sight, Galicia, Asturias (0% S116*/whole-S116 and low enough % of DF27/whole-S116) seem having received more variated ligneages of Y-R1b and some of them (U152, U106? …) from other places not around Basque Country, perhaps later? Later and smaller groups without territorial mating continuity: better chances to loose the older SNP, S116*
Madrid sample (if valuable) shows the higher absolute % of DF27 after Basque Country, the second higher relative % DF27/whole-S116 after “false Basques” and a reasonable (middle) loss of relative % S116*/whole-S116: it could check an origin in the surroundings of Basque Country, what would correspond to History: Reconquista, people from peri-Basque places (see castellan phonetics). Places like Catalona, Alicante and Andalusia show some links to Basque genetic Y-DNA evolution but evidently with a more complicated story…Asturias, Galicia and Portugal could have had a globally same story, with a layer of DF27 from Western Pyrenees/Aquitaine areas at first, more in Portugal which shows more DF27/S116 and more S116*/whole-S116(Duro and Tajo rivers?), and different and more recently arrived Y-R1b SNPs in Galicia and Asturias in smaller spotty groups and not by global “contamination” (other Celts, Germanics).
The (possible) explanation of basque Y-DNA situation by the colonization of an almost empty land by a small group is not too evident; Atlantic shores were densely inhabited since a long enough time. So S116*, scarce at first in Western Europe, had already got strength in around France (East at first) and seemingly gave birth to L21/L527 rather in Northwest and to DF27 in Southwest (Aquitaine?). So DF27 is “basque” compared to other Iberian places but was born in a slightly more northern place. The today presence of downstream SNPs of DF27 in far places as Ireland, Britain, North Sea shores, Scandinavia, Baltic shores, Poland and Ukraina does not lead me to search an eastern place of birth to it. If Y-R1b was already present somewhere West during the last Atlantic megalithic times or the plain Atlantic Bronze, these curious geographic distribution could be easily explained, principally by maritime moves. Only an hypothesis at this stage of my picked up knowledge… A try. All the way I have some difficulties to swallow the dates of coalescence given in this survey, according to my other readings.