sparkey
Great Adventurer
- Messages
- 2,250
- Reaction score
- 357
- Points
- 0
- Location
- California
- Ethnic group
- 3/4 Colonial American, 1/8 Cornish, 1/8 Welsh
- Y-DNA haplogroup
- I2c1 PF3892+ (Swiss)
- mtDNA haplogroup
- U4a (Cornish)
The original paper is here, although it is probably easier to refer to Dienekes' analysis here. The biggest takeaway is this phylogenetic tree (also available at Dieneke's analysis):
When discussing Sardinian settlement during the Neolithic, it's easy to conclude that they were I2a1a dominant, considering that I2a1a is derived from a Paleolithic lineage, it has an earlier TMRCA than most European lineages, and it is found in multiple Neolithic European samples. But this phylogeny does not support that at all, with an obvious founder effect having a more recent expansion than even the Sardinian R1b. Rather, it looks like early Sardinians would have been mainly J2b, J2a, and G2a, with E1b a possibly important minority.
Something less important to most people but exciting to me is that we've finally got a peer reviewed study that tested for I2c! They are well fewer than 1% of the total samples, but it's an indication that I2c frequency extends in trace levels down to Sardinia, which we haven't seen before, and for once we can conclude that this is indeed I2c, and not its cousin, I2b-ADR. Its early splitting point in Sardinia could be an indication that I2c is relatively ancient to the Mediterranean, as opposed to more being more ancient to modern Germany, as I've proposed before.
When discussing Sardinian settlement during the Neolithic, it's easy to conclude that they were I2a1a dominant, considering that I2a1a is derived from a Paleolithic lineage, it has an earlier TMRCA than most European lineages, and it is found in multiple Neolithic European samples. But this phylogeny does not support that at all, with an obvious founder effect having a more recent expansion than even the Sardinian R1b. Rather, it looks like early Sardinians would have been mainly J2b, J2a, and G2a, with E1b a possibly important minority.
Something less important to most people but exciting to me is that we've finally got a peer reviewed study that tested for I2c! They are well fewer than 1% of the total samples, but it's an indication that I2c frequency extends in trace levels down to Sardinia, which we haven't seen before, and for once we can conclude that this is indeed I2c, and not its cousin, I2b-ADR. Its early splitting point in Sardinia could be an indication that I2c is relatively ancient to the Mediterranean, as opposed to more being more ancient to modern Germany, as I've proposed before.