John Shelton, Jr. and Mary Isabel (Bynum) Shelton, photograph ca. 1885, Morris County, TX |
| Analysis of DC24 & Descendants |
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SUMMARY OF YSNP (May, 2016)
Classification of Branch: Fairly broad branch - son of FGC5628. Known sons: DC50 and A6097 are the sons of DC24, DC55 is the son of DC50 and DC19 is the son of A6097. Estimated Breadth of branch (speculative estimate of positive submissions): currently around twenty-two but scope will probably expand some with new testing of YSNPs and improvements in the SAPP tool. Scope of Testing within Signature: Four full Big Y tests, two partial NGS (BAM files have not been sent to Dennis Wright to analyze or he is a little behind on these two NGS files) and one YSEQ SNP panel test. Dominant Surnames (including variants): Burns (3), Lynch (3), Noland (3), Cannon (3), Kennedy (2), Bergesen (1), Mayer (1), Wright (1), Newberry (1), Slaughter (1), unknown surname (1), O'Neil (1), McCann (1) and Gibbs (1). Date that branch was discovered: Unknown. Source of Branch discovery: Four FTDNA Big Y tests (217593, 293836, 280147 and N54074). Number of Negative Broad Tests: Around 45 Big Y results and 30 more via packs & panels. Number of Negative Tests within Signature: None known. Pending Tests (within signature): None known.
ANALYSIS OF CURRENT DC24 HAPLOTREE I manually separated around 111 L226 submissions combined with 25 known YSNP results and then used the SAPP tool to generate a chart which matched the scope found from my manual analysis (it is always somewhat larger due to the 100 submission limit). The SAPP tool seemed to recognize the progression of YSTR mutations but produced several errors that had to be corrected. However, the SAPP did its usual excellent job of identifying many close matches that were included in the haplotree. This branch of L226 has several issues preventing the complete descendant chart of DC24: 1) Since there was four branches to analyze, I first looked at the signatures of these four branches and determined that there were pretty good signatures associated with these branches. This was enough information to reveal some pretty clear evolution of YSTR mutations. The SAPP did a very good job with all the branching information plus seven positive testing results of these branches. The scope of DC24 produced by the SAPP was quite larger that what manual analysis supports, so around 30 % of the submissions that were predicted DC24 positive were removed due to lack of much commonality with any other tested submissions. 2) The current limit of around 100 submissions limits the accuracy of the descendant chart for this particular L226 branch. As more submissions can be entered into the SAPP tool, as new branches are discovered and as more YSNPs are tested, several more submissions will be included under the DC24 branch over time. 3) However, between my manual analysis and the SAPP tool, sixteen good testing candidates were revealed. Again, the SAPP tool does an excellent job in making the DC24 haplotree much more bushy by finding close matches.
OTHER FUTURE YSNP TESTING No pending tests are known.
DC24 Haplotree The link to the haplotree chart is the best way to look at the evolution of the DC24 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:
Testing Candidate Recommendations
This summary will attempt to priortize testing and explain why each test is beneficial to the the verification of the DC24 branches. Here are the priorities for testing: 1) It is recommended that all current submissions that are predicted positive for the four DC24 branches should test branches according to their position of the haplotree chart. DC24 branches should be tested at $17.50 per YSNP from YSEQ. Below are the recommended tests of these branches via individual YSNP tests: Predicted DC24+, DC50- and A6097- Predicted DC24+, DC50+ and DC55 - Predicted DC55+ 2) Once these testing candidates are confirmed for their status of these DC24 branches, it is recommended that these submissions next test the private YSNPs associated with the NGS tester whose signature they match (in the same branch). These YSNPs will need to added to the YSEQ list of individual YSNPs and can be ordered via the Wish a SNP request form (cost of $1 per YSNP). Once these YSNPs become available for ordering, the first phase of testing for new branches to be discovered would be: For those matching N54074 For those matching 217593 For those matching 306374 For those matching 293836 Private YSNPs should not be ordered unless you have confirmed the results of DC24 and complete the recommended testing listed above. After the first phase of testing private YSNPs, additional private YSNPs will be recommended during phase two of testing private YSNPs. As test results for these private YSNPs become known, the recommended list will change over time based on the testing results received. Testing private YSNPs is speculative testing for the discovery of new branches as well as confirming known branches. Discovery of new branches has similar risks as the Big Y test but at much lower costs. However, Big Y testing will always discover yet more private YSNPs where testing existing private YSNPs will never discover any new private YSNPs.
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