News for G2a3b1a2 persons
The announcement of the existence of L497 which defines your subgroup was the focus of the annual newsletter last year. Yours is the largest subgroup in Europe, encompassing about 40% of the population. There have been many new development regarding your group.
Within the 1000 Genomes Project last fall I was able to extract perhaps about 100 SNP mutations found in five L497 men. Some of these are SNPs shared by all L497 men. There were an unusual number of these. suggesting that the L497 group existed as a small group for perhaps a millennium or more before a big expansion began. Within all these SNPs are probably 10 to 20 that represent valid branches of the L497 subgroup. We would like to have all of these available for testing, but Family Tree DNA will only provide tests that meet multiple criteria, and we were only able to get tests for Z725 and Z1901which likely only represent fairly small L497 subgroups. We will continue to try to see that promising SNPs in this resource would be turned into tests. If we can get these new SNPs as tests it will really accelerate progress in defining the movements of your L497 ancestors.
We are still waiting for the researchers to start testing for L497 and include them in studies, but from e-mail correspondence with some researchers we know they are aware of your subgroup.
Within the project, we added quite a number of new men to the L497 section as they joined the project, but L497 samples outside of Europe continue to be almost unheard of. We were particularly interested last year in a sample from the island of Lemnos off the western coast of Turkey. This island has known connections to the Etruscans. This sample did turn out to be L497+ though it has some very eccentric marker values. And a researcher found a sample with similar marker values from the west coast of Turkey that is also L497 -- the only Turkish sample of this category in his collection. The question remains open whether whether these men are from an early branch of L497. If so, this could argue for an early movement from the Turkish coast to Europe in conjunction with the Etruscans.
This year we added a new feature to the G web site that deals with the L497 subgroup.
The purpose was to estimate the number of L497 men as a percentage in the population based on marker values. This is an imperfect way to do this, but many of these sites do not have L497 testing, and this is the best we can do in the meantime.
I do not think we added any new subgroups of L497 in the last year. There are eight currently listed. In fact, I think the number of L497 subgroups likely shrunk a few when we removed subgroups for which coverage so far was found in a single family. They want these removed from the official trees until wider coverage is established for a SNP. The several men from L497 who ordered the Walk through the Y test did not have new SNPs in their samples -- unlike participants from many other G subgroups. Those new SNP mutations are the big promise for the future, and the search for shared marker value oddities has been somewhat sidelined because of this.
We have divided general L497 into three groups.
(1) Those confirmed L497 and tested all subgroups.
(2) Those confirmed L497 and not tested for all subgroups
(3) Those only predicted L497
For those several dozen men who have been tested for L497 and its subgroups, we do not have anything to recommend in the way of additional testing. Thank you for establishing where you fall among these groupings. We will continue to look for ways to subdivide you.
For those confirmed L497 but not tested for all subgroups, this can be resolved either by upgrading to 67 markers (and determining your L43 status if unknown). However, everyone is different. I can rule out the need to test for most L497 subgroups, and in many cases the only thing that needs testing is one or two markers at $7.20 each -- a bargain.
For the very large number of men who have not been confirmed L497, my personal opinion it is not a high priority to be tested for L497 because we are quite sure of your status. However, your status regarding some of the subgroups needs to be confirmed, and these tests may be very inexpensive, starting at $7.20 for a marker test. I would need to evaluate each sample to see what subgroups we can rule out for you. There are a few exceptions here. There are a few of you with eccentric marker values and testing for L497 is mandatory. Thus if you have a 12 value for DYS393, 21 for DYS390 or 16 for DYS19, we would like to see confirmatory tests for L497. The other exception involves men in the same surname group. Check to see if someone with your surname is already listed as confirmed L497. This would mean you will have the same finding unless the shared surname is accidental and the man with shared surname is not one of your close matches.
As mentioned in the general news section, if you are willing to better define your grouping, I will be glad to give individual recommendations and help. firstname.lastname@example.org.