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Diana, Goddess
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Converting Y-DNA STR Test Results between SMGF, AncestryDNA, and FamilyTreeDNA |
I created these tables for my own use, but put them online in case
they may be of help to anyone else (19 July 2011). These are conversion
tables for Y-DNA STR test results between SMGF (Sorenson Molecular Genealogy
Foundation), Ancestry.com, and FTDNA (FamilyTreeDNA).
Update (3 Dec 2016): SMGF was bought out by Ancestry.com, who then took the SMGF database offline, a slap in the face to the pioneer testors at SMGF and a major disservice to the genetic genealogy community as a whole. I'm told there were some 20,000 records in the SMGF database. I didn't note the date, but Ancestry.com stopped doing Y-DNA and mtDNA testing years ago. The current AncestryDNA test is an autosomal-DNA (aDNA) test comparable to FTDNA's FamilyFinder test. Personally, I don't find aDNA testing very helpful for those looking to support or debunk the ancestries in paper genealogies; the test is only sensitive back about five generations (six or seven with a lot of work). Nor is mtDNA especially helpful, except to answer some simple, though sometimes vital questions, such as, establishing whether or not a child could have had a particular mother. I say could have because sisters (and aunts and female cousins) will have the same mtDNA. If you are going to get mtDNA tested, do take the full sequence (FS) test. mtDNA mutates rarely — I once calculated, about every 60 generations — which is not often enough to be useful in genealogical time. The mtDNA-FS test is the one most likely to pick up subtle differences. The most powerful genetic testing for family genealogists is testing
of the male Y-chromosome, called "Y-DNA" testing. There are two kinds
of Y-DNA testing: STR (short tandem repeat) and SNP (single nucleotide
polymorphism). Both are useful.
FTDNA is the 900 lb gorilla in the world of Y-DNA testing for family genealogists. If you haven't been Y-DNA tested, yet, that is the lab to use. If you've already been Y-DNA tested elsewhere, get re-tested at FTDNA. Especially, take advantage of the BigY-500 test. It is both a SNP test and STR test. |
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