Wednesday, July 17, 2013
M26+ L277+ L247+
M26+ (L672- and L277-)
What's new is that several L672+ men and one L247+ man have completed Geno 2.0 tests. We learned that the L247+ man is ancestral for 17 SNPs that previously were thought to be equivalent to M26. Now the M26+ L672- L277- man is doing the Geno 2.0 test, and I expect that he will be on his own branch that split off even earlier, and he will be ancestral for some of the 36 SNPs that currently give results equivalent to M26.
The Mexican-American M26+ L277+ L247+ also had two new SNP results at Geno 2.0: he is F1915+ and YSC0000078+. These occur somewhere in the area of L277 or L247.
Thursday, July 11, 2013
It's starting to look like the second scenario is closer to what happened. The I2a Project at Family Tree DNA (FTDNA) has around 8 I-M26 members who were born in Sardinia, or who have fathers or grandfathers born in Sardinia. From testing at FTDNA we know that they are all likely L160+, the I-L160 group is the most common group of I-M26 but there are several L160- branches known only from continental Europe and Britain and Ireland. The design of the new Genographic 2.0 test involved sequencing several men living in Sardinia, so it includes many new SNPs relevant to these men. So far, one Sardinian-American man and one Maltese ancestry man belong to the PF4190 branch of I-L160. I think probably many or most I-M26 men living in Sardinia will belong to this branch, but we will need more testing to be sure.