William and Malinda Bellomy

William Bellomy and Malinda (Wininger) Bellomy, photograph ca. 1870, Jackson County, AL
 



Analysis of L679 SNP

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).

 

Fingerprint
Match
L1336
Percentage
Fingerprint
Match
Known Number of Testing Candidates

Total
Tested

Percent
Tested

Total
Positive
Percent
Positive
Percent
Predicted
Positive
Number
Predicted
Positive
17 of 17
100
5
0
0
0
NA
95
4.8
16 of 17
94
1
0
0
0
NA
90
0.9
15 of 17
88
1
1
100
1
100
85
0.9
14 of 17
82
1
1
100
1
100
80
0.8
13 of 17
76
0
0
0
0
NA
70
0.0
12 of 17
71
1
1
100
0
0
30
0.3
11 of 17
65
0
0
0
0
NA
10
0.0
10 of 17
59
0
0
0
0
NA
5
0.0
Total
7.7

 

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:

 

SNP
Number
FTDNA Submission Number
(or WTY GRC number)

Project Name

Test Results
Prove father of L679
L679+
170191
L21 Plus
DF13+
Prove L679 is not equivalent of father
L679-
N26398
L21 Plus
DF13+
Eliminate possible fathers of L679
L679+
170191
L21 WTY
DF49-
L679+
170191
L21 WTY
L513-
L679+
170191
L21 Plus
L96-
L679+
170191
L21 Plus
L144-
L679+
170191
L21 WTY
L371-
L679+
170191
L21 Plus
Z255-
L679+
170191
L21 Plus
Z253-
L679+
170191
L21 Plus
DF21-
L679+
170191
L21 WTY
DF41-
L679+
170191
L21 WTY
L1335-
L679+
170191
L21 Plus
CTS4466-
L679+
170191
L21 Plus
L555-
Eliminate possible sons of L679
L679-
91704
NA
DF49+
L679-
4479
NA
L513+
L679-
176268
NA
L96+
L679-
130084
NA
L144+
L679-
N84982
NA
L371+
L679-
14738
NA
Z255+
L679-
23996
NA
Z253+
L679-
16473
NA
DF21+
L679-
176148
NA
DF41+
L679-
19706
NA
L1335+
L679-
210257
NA
CTS4466+
L679-
65048
NA
L555+
Prove equivalent SNPs of L679
L679+
None known
NA
NA
Prove SNPs that are sons of L679
L679+
None known
NA
NA

 

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.

 

SNP
Number
FTDNA Submission Number
(or WTY GRC number)

Project Name

Test Results
Prove 15 % Diversity requirement
L679+
170191 (Bond)
L21 Plus
Base
L679+
20860 (Turner)
L21 SS
GD = 5
Prove Surname diversity requirement
L679+
170191 (Bond)
L21 Plus
Bond
L679+
20860 (Tuner)
L21 SS
Turner

 

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).