On Saturday, December 19, 2015 at 11:26:51 AM UTC-8, Michael OHearn via wrote:
> As to the Alan signature Y-DNA, the few tests done on skeletal remains do
> indeed point to G2 and I types, which makes perfectly good sense as
> migrating hordes tend to be made up of an amalgam of different peoples.
OK, I found the research to which you probably refer, a 2014 paper which, as far as I can tell, appeared in a collection of invited papers in tribute to a Caucasus archaeologist. I can't tell if it was peer reviewed or not, but we can give them the benefit of the doubt for the time being (anyone out there read Russian?).
> Again, the Alan / Ossetian G2 derivation is just one plausible explanation
> for Plantagenet Y-DNA.
And yet, as just one of innumerable possible explanations, you continue to focus on it as if it had the slightest evidence to support it. It has no such evidence.
There was a time when this was a noteworthy hypotheses, but that time has long since passed. Recent progress on several fronts has removed any reason to look upon it favorably.
First, in the very early days of haplotype analysis, a critical assumption was made - that by cataloguing the frequencies in existing populations, one could extrapolate the area where a haplogroup originated. G was highest in the Caucasus, so it must have come from there. Since he Alans were known to have gone from there to Europe, it represented a plausible mechanisms for its introduction into Europe. In retrospect, this entire assumption was deeply flawed, and we already knew of multiple cases where this assumption failed (these at the time were viewed as exceptions). However, over the past five years it has become increasingly apparent that current distributions give no indication of the case 3000 years ago, that European prehistory consisted of repeated waves of migration and population displacement, such that modern distributions can in no way be taken as representing ancient distributions - just because G2 is highest in the Caucuses doesn't mean it came from there.
Second, we now know from more precise analysis that it didn't come from the Caucuses, it went to there. The diversity of the G2 haplogroup in the Caucuses is significantly less than that of other places. This demonstrates that G2 originated elsewhere, and that just one branch of G2 took it to the Caucuses, so there is no longer any reason to favor its introduction into Europe by looking for a group from the Caucuses.
Third, we now know that the 'second wave' of humans who moved into Europe and displaced (and to a lesser extent subsumed) the hunter-gatherers were G2. The place with the highest G2 in Europe is also the place where the genetics of these earliest farmers persist, most uninfluenced by later migrations that brought R and E (along with the Indo-European language) into Europe - Sardinia. G2 is found in the agriculturalists in Northern Turkey, right before they moved into Europe, and it is found among the members of this migration after they settled in Europe (one from Germany, one from the Alps). This tilts the scales even further. Not only is it now entirely unnecessary to attribute a G2 in Europe to the Alans, it a violation of Occam's Razor, introducing an additional entity than is necessary to explain the phenomenon (to put it plainly, if G2 is already in Europe, then it is entirely unnecessary to invoke an invading population as its source).
While an Alan derivation is a formal possibility, its relative likelihood hardly merits giving it special mention, let alone making it the featured explanation.
taf