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Mark,

Food for thought.

Just so you're aware, you didn't "leapfrog" BigY. SNP Panels have limited use and only can identify?based on previous BIgY testers to the point where you don't share a common ancestor. They will never replace?BigY nor are they better. R-A6507 branches off over 1,300 years ago (which is well before the advent of surnames). You will never be able to come down your line on the backs of other testers..you will always need BigY or equivalent Discovery Test to actually identify?YOUR?line of SNP mutations and build new branches. Testing individual downstream SNPs is not generally useful or productive, and just?takes time and extra money. It isn't a recommended way to understand your own place on the tree. The best way is to do a BIgY, see how far down the tree you get, recruit Y STR matches?to upgrade as well, until you've got a fairly recent branch on the tree (within the last few hundred years).

Autosomal DNA is only useful overall within the last several generations, and sometimes not even then when endogamy is involved. Most Y DNA matches don't share ANY autosomal DNA so it is not in the realm of haplotree creation. They are two very different?things. Autosomal DNA use for this endeavour is biologically limited since it isn't connected to SNP data nor can you ascertain patrilines from it.

As for STRs, James doesn't?use them in isolation. The STR values (including the extended panels of STRs from BIgY testing) are examined?and applied to an already mapped of haplotree using BIgY SNPs. Panel SNPs can't really be used that well because it leaves ambiguity since you've stopped short of where you should?be and you don't have any extended?BigY STRs to add to the project/tree. STR patterns can be noticed when dealing with large numbers of men over a wide timeframe, especially?those which have a consistent pattern across multiple branches. Those STRs which are more unstable aren't easily used. BUt STRs alone are never used in modern day genetic genealogy and haplotree creation.

Hope that helps.

Lucas McCaw, BSc., BEd.