SUMMARY OF SNP (May, 2013 - 2nd version)

Classification of SNP: Private or near private. L679 is currently a son of DF13. This Y-SNP is dominated by the Turner surname and has a limited scope. The maximum genetic distance found from probable testing candidates is a genetic distance of seven which is now broad enough for qualification for the ISOGG haplotree. Therefore, with additional testing of existing testing candidates, the genetic diversity requirement for ISOGG qualification should be met (if they test positive as expected).

Estimated Breadth of SNP (over 70 % match): Only eight submissions found.

Scope of Testing within Fingerprint: Average - two of the eight good testing candidates have been tested L679 positive.

Dominant Surname (positive): Bond (1) and Turner (1). Most testing candidates have the Turner surname.

Year that SNPs were discovered: August, 2011 (WTY).

Source of SNP: FTDNA WTY - Bond, FTDNA 170191, Y-Search - not found.

Number of Positive Tests (March, 2012): Two known.

Number of Negative Broad Tests: Around 50 negative tests (primarily Nat Geo and Walk the Y tests).

Number of Negative Tests within Fingerprint (over 70 % match): None.

Possible Untested Candidates (over 70 % match): Only six.

Pending Tests (within Fingerprint): None known.

TRENDS OF TESTING CANDIDATES

L679 Fingerprint

The curve associated with the testing candidates appears to be typical for L21 SNPs where the number of testing candidates declines down to 70 % matches, remains low between 50 and 70 % and then sees a sharp rise as non-L679 submissions dominate the under 50 % matches. The L679 YSNP appears very genetically isolated from other submissions (only one testing candidate from 10 of 17 matches through 13 of 17 matches that tested negative).

ISOGG Status - Prove relationship of L679 to other L21 SNPs

Requirements of proving L679 position on the ISOGG haplotree have been met but the genetic distance requirement has not been met. L679 has not been added to the ISOGG haplotree. Below is a summary of SNPs tested:

ISOGG Status - Prove genetic and surname diversity of L679

L679 does not satisfy the 10 % genetic diversity requirement but does satisfy the surname diversity requirement for inclusion on the ISOGG haplotree. Two submissions of L679 must have at least a genetic distance of 7 (10 % x 67 markers = 7). With all known testing candidates with high fingerprint matches, L679 should qualify for the recently updated genetic diversity requirement.

DNA FINGERPRINTS

L21 Off Modal Mutations:

Markers 1 to 37: 393 <= 12, 390 <= 23, 19 >= 15, 391 <= 10, 385a >= 12, 439 >= 13, 458 <= 16, 455 <= 10, 449 <= 29, 464a <= 14, 464c <= 15, 464d <= 15, 460 >= 13 and 570 <= 16 (14 mutations).

Markers 38 to 67: 444 >= 14, 520 >= 21 and 446 >= 14 (3 mutations).

DNA Signature (L21 Plus project): z4551015.

Markers 1 to 37: 393 = 12, 19 >= 15, 391 = 10 and 455 = 10 (4 mutations).

Markers 38 to 67: 444 = 14, 520 = 21 and 446 = 14 (3 mutations).

390 <= 23, 455 <= 10, 460 >=13 and 444 >=14 are key markers within the L679 fingerprint. This means that these mutations happened very close to the creation of the L679 mutation. All other Y-STR markers included in the L679 probably happened some time prior to L679 creation.

Testing Candidate Recommendations

For a detailed list of good testing candidates, see the spreadsheet of testing candidates which can be found in the L679 link in the DNA Results pull down menu. Here are the priorities for testing:

1) Almost every submission that is over 70 % matches (13 of 17 matches and higher) will probably test positive. However, several of these testing candidates will be required to be tested in order to pass the ISOGG haplotree requirement for genetic diversity. There are six excellent testing candidates: Turner (5795, 154252, 12549, 263912), McKinney (206282) and Lee (66027). The currently known testing candidates have the maximum genetic diversity of seven and when tested would satisfy the ISOGG genetic diversity qualification.

2) Other closer 37 marker matches could be upgraded to 67 markers and could provide even more genetic diversity and would reveal a better understanding of true scope of L679. There are at least twenty-one 37 marker submissions found in Group 1 of the FTDNA Turner Surname project that could be upgraded to 67 markers for further analysis and testing of L679.

3) There are nine submissions that match between 50 % and 70 % of the L679 fingerprint. These should be considered very speculative in nature since the boundary conditions of L679 are probably exceeded by these submissions. See the L679 spreadsheet for testing candidates that are lower than 10 of 17 matches. These submissions need to be tested for R-L21 prior to testing for L679. Logan (57207) and Humphrey (67723) are known to be R-M269 negative (and therefore can not be R-L21 positive). Logan (201874) is R-M269 positive and has been assigned to the L21 signature, 513-aus. Griffith (161062) and Balland (157364) are FTDNA predicted to be R-M269 positive but still should be tested for R-L21 prior to testing for L679. There are no known Y-SNP reports available for the four remaining 7 of 13 match testing candidates: Butler (31134 and 40055), Roy (146117) and Chapman (113500). It should be noted that the only 12 of 17 match testing candidate has already tested L679 negative (there are no 10 of 17 matches or 11 of 17 matches known at this time).