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little about expansion, exepct perhaps whether it started softly or briskly."And that is the problem with the paper - it glosses over the fact that some haplogroups expanded extremely briskly, while other seem to have expand very slowly, or perhaps experienced contraction or bottleneck. If you break down the results by subclades, you can see precisely when certain sublades began to expand briskly. Using U5a2a as an example, its age estimate is about 13000 ybp, and there are three lineages of U5a2a, of which two are represented by a single FMS sample. The third lineage, U5a2a1 has 61 FMS samples with a very strong star pattern and an age estimate of 6000 ybp. This suggests to me that U5a2a was part of a Mesolithic hunter-gather population (confirmed by an ancient DNA sample in Germany at 8700 ybp) and that U5a2a1 adopted agriculture or herding around 6000 years ago and then began its rapid population growth. So it's really not just about the nomenclature - ignoring the extremely different expansion patterns in the data raises concerns about the accuracy of the analysis.
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(VISITOR) AUTHOR'S NAME
Flickr
MESSAGE TIMESTAMP
19 december 2014, 02:13:18
AUTHOR'S IP LOGGED
117.169.1.189
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