SUMMARY OF YSNP (May, 2016)

Classification of Branch: Small Branch- son of FGC5659.

Known sons: None known.

Estimated Breadth of branch (speculative estimate of positive submissions) = around eight submissions are known but scope could be larger.

Scope of Testing within Signature: Only two tests for within the current scope of this branch. There are only two NGS tests with results to date, there has been no other YSNP testing within the scope of this branch.

Dominant Surnames: Kelly variations (3), McGrath (2), Hamilton (1), O'Brien (1) and O'Dea (1) - several more could be added once the true scope of branch becomes better known.

Date that branch was discovered: Unknown.

Source of Branch discovery: Two FTDNA Big Y tests (84813 and 313502).

Number of Negative Broad Tests: Around 45 NGS tests and 30 more via packs & panels.

Number of Negative Tests within Signature: None known.

Pending Tests (within signature): None known.

ANALYSIS OF CURRENT DC41 HAPLOTREE

I manually separated around 100 L226 submissions combined with 27 known YSNP results and used the SAPP tool to generate a chart which shows a reasonable scope when compared to my manual analysis. However, the SAPP tool appears to have several small accuracy issues that were manually corrected. The most serious issue is that one submission incorrectly had one correct mutation replaced by another random mutation. There were also more than usual the number of branches that required minor re-arrangement to more logical haplotree (common mutations were not combined properly). This branch of L226 has several issues preventing the complete descendant chart:

1) There are two signatures associated with DC41 and both signatures shared one marker mutation which really enhanced the accuracy. One branch allowed the two Kelly submissions to be group into one branch with one signature. The other branches also had common mutations that created two significant lower branches. Overall, the haplotree is somewhat speculative in nature due to only being based on one common mutation, however, this small group looks more reasonable than other clusters due to common surnames and severa additional YSTR based branches below DC41. The shared mutation is known to have multiple parallel mutations under L226 that YSNP testing help filter out with accuracy.

2) The current limit of around 100 submissions limits the accuracy of the desendant chart for this particular L226 branch. As more submissions are included in the SAPP analysis and more YSNPs are tested, a few more submissions may be added and a few may be removed from the DC41 branch over time.

3) The two signatures associated with DC41 reveals six good testing candidates. The testing of these testing candidates will greatly improve the accuracy of the the descendant chart and several submissions could be removed and several more could be added as well.

OTHER FUTURE YSNP TESTING

No pending tests are known.

DC41 Haplotree

The link to the haplotree chart is the best way to look at the evolution of the DC41 haplotree. It is visually much easier to follow than spreadsheets and is very close to a genealogist descendant tree charts that genealogists already are well trained in analyzing:

Haplotree of DC41

This summary will attempt to priortize testing and explain why each test is beneficial to the the verification of the DC41 branches and determining the scope of the DC41 branch.

Here are the priorities for testing:

1) The scope of DC41 is fairly well known but its scope could somewhat increase when more submissions are allowed as input to SAPP as well as more YDNA information as input to SAPP (new YSNP testing and new 67 marker YSTR submissions).

2) It is recommended that all current submissions that are predicted positive for DC41 branches should test only DC41 for $17.50 from YSEQ.

3) There are currently six predicted DC41 positive testing candidates:

For the signature associated with 84813:

84933 O'Kelly - test DC41
84924 O'Dea - test DC41

The signature associated with the other submissions is only based primarily on one mutation that defines DC41. These tests should be considered more speculative in nature but still have an over 50 % chance of testing positive for DC41:

191110 Hamilton - test DC41
148239 O'Brien - test DC41
178183 McGrath - test DC41
YTFDJZ McGrath - test DC41

4) Once these testing candidates are confirmed as DC41 positive, testing is recommended for the private YSNPs associated with the NGS submission whose signature best matches (in the same branch). Future updates of this section will recommend further testing of private YSNPs for each signature.