SUMMARY OF SNP (JULY, 2012)

Classification of SNP: Small branch.

Estimated Breadth of L744 (over 70 % match): around 84 known submissions - all appear to be positive based on current testing (18 positive known - none negative). From the trend of known testing candidates, it appears that almost all 84 submissions above 70 % will probably test positive. With the rapid rate of increase of testing candidates below 70 %, only a handful of testing candidates will probably test positive below 70 % matches. However, those submissions that positive below 70 % matches will be critical in determining the true fingerprint of L744 and have the highest probability of discovering different combinations of positive and negative results for L744, L745 and L746. L744 is the son of DF41.

Testing of 8 of 9 matches and above has almost a 100 % probability of testing positive. However, the $29 testing charge is very reasonable for verifying your most recent Y-SNP. Testing of more than one submission that is believed to share the same oldest proven ancestor is not recommended. Testing of 7 of 9 fingerprint matches is highly recommended (most will probably test positive). Additionally, testing of 6 of 9 fingerprints is also highly recommended as well (although the vast majority will probably test negative). Testing of 5 of 9 fingerprint matches could yield a few positive results but this fingerprint match has very low odds of testing positive. Testing any fingerprint match below 50 % matches is not recommended.

Twelve positive submissions are dominated by the surname of Stewart and Stewart surname variants. Several non-Stewart surname have also tested positive: Clancey (2), Mitchell (1), Pearce (1), Thomas (1) and Webb (1). L744 is the father of L745 due to the Webb submission (75703) testing L745 negative and positive for L744 and L746. L746 is currently redundant with L744 as L744 and L746 track exactly with currently tested submissions. L744 is now the son of DF41 since there is a submission that is both L744 positive and DF41 positive (52758). The table below proves where L744 fits into the existing ISOGG haplotree and demonstrates any known sons L744 or redundants SNPs of L744.

ISOGG Status - Prove relationship of L744 to other L21 SNPs

ISOGG Status - Prove genetic and surname diversity of L744

Getting any Y-SNP qualified for the ISOGG haplotree requires that L744 pass the 15 % genetic diversity rule which requires finding two positive submissions with at least the genetic distance of 10 (67 x 15 %) at 67 markers. It also requires having at least two surnames (not including surname variants). The table below proves both the genetic diversity and surname diversity requirements:

The following list are not required for ISOGG qualification but test to see if other DF13 / L21 Private SNPs are not the sons of L744. These submissions have tested positive for L744 but negative for the following smaller scope L21 sons (from the WTY 143035 or GRC017948): L9, L10, L69.4, L130, L159.3, L302, L319.2, L526, L563, L564, L580, L583, L679 and L743. The only missing private SNP that has not been tested by L744 is L643. It is recommended that a L744 positive submission be tested for L643 to see if L643 is a son of L744. It is not certain why the L744 WTY was not tested for L643 (since L643 was discovered prior to L744).

SUMMARY OF L744 TESTING

Year that SNPs were discovered: 2011 (estimate).

Source of SNP: FTDNA WTY - Stewart, 143035 (KQQDM).

Number of Positive Tests (June, 2012): 18 known.

Number of Negative Tests (June, 2012): 28 known.

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

Possible Untested Candidates (over 70 % match): Around 84.

Pending Tests (within Fingerprint): None known.

DNA FINGERPRINTS & SIGNATURES

DNA Fingerprint (R-L21 Private web site) - Nine markers total

Markers 1 to 37: 449 <= 29, 464a <= 14, GATA-H4 <= 10, 456 <= 15 and 576 <= 17 (5 mutations).

Markers 38 to 67: 406S1 >= 11, 520 >=21, 446 >=14 and 565 <= 11 (4 mutations).

DNA Signature (R-L21 Plus spreadsheet): 746-STU - Five markers total

Markers 1 to 37: GATA-H4 = 10 and 456 = 15 (2 mutations).

Markers 38 to 67: 406S1 = 11, 446 = 14 and 565 = 11 (3 mutations).

Boundary Condition Testing

Most Distant Positive Test Known (67 markers)
(from MRCA of positive submissions - not WTY):

Webb, 75703, DNA Fingerprint match (7 out of 9) and GD = 6.

Closest Negative Test Known (67 markers)
(from MRCA of positive submissions - not WTY):

Erwin, 42048, DNA Fingerprint match (6 out of 9) and GD = 8.