I obtain f3(French; Sardinian, Burusho) = -0.002652 (Z=-13.541)
on the basis of 446,917 SNPs. This is the strongest signal of
admixture in the French that involves a population that is high
on the "West_Asian" component whose influence I have been
investigating. I thus carried out rolloff analysis using the
French as a target population and the Sardinians and Burusho as
reference populations. The exponential fit can be seen below:
The jackknife gives 239.556 +/- 50.553 generations for this
admixture, which corresponds (assuming a generation length of 29
years) to 6,950 +/- 1,470 years. Analysis of autosomal DNA from
the Tyrolean Iceman and a Neolithic TRB farmer from Sweden have
revealed an absence of the West Asian ancestral component and a
Sardinian-like Neolithic population c. 5ka in Europe. This
population may have extended to at least to the Balkans in space
and down to the Iron Age in time. In my opinion, the simplest
explanaton for the evidence is that the admixture picked up by
rolloff took place in W