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Originally Posted by
Fire Haired
Why slavs the Slavic marker is R1a1a1b1 not I2a1b.
No population has only one marker. I agree, in fact, that the pre-proto-Slavs, i.e. the Balto-Slavs, would have probably been R1a dominant. Their shared R1a testifies to this. After that, the most likely scenario I see is the two populations splitting and absorbing and/or expanding local N1c (in the case of the Balts) and I2a-Din (in the case of the Slavs) markers.

Originally Posted by
Fire Haired
The slavic language spread to Yugoslavia in the middle ages. I2a1b had already been there it is much more rare in the place Slavic languages spread from to Yugoslavia in my opinion there is no way that is the source.
You're making an argument from modern frequency again. Haven't you read yet about why this is a poor line of reasoning?

Originally Posted by
Fire Haired
Frm what Maciamo says I2a1 started 20,000ybp in a ice age refuge somewhere ins outhern Europe then I2a1a(western meditreaen) and I2a1b split almost immeditaly. That is what he said in his Genetic history of Italy that makes alot more sense to me.
All of that is basically correct, and not incompatible with I2a1b3a L147.2+ ("I2a-Din") being spread by the Slavs. Notice that I2a-Din is even further downstream than I2a1b. It's a young haplogroup (younger than I1!). So it can both have ancestors as you describe, and be spread by the Slavs coming down from the Ukraine area.