Strain DNA Project

 

  

 

The Strain DNA Project

 

Purpose of the project

Participants   Updated 12/30/2010

Procedure

Results  Updated 4/29/2014

How to join the project

Links

  

Other Information

 

Famous Strains New 8/6/2010

Speculations on the origin of the Strain surname   Updated 9/1/2007

  

Purpose of the project

 

The Strain Surname DNA Project was originally organized to determine whether two lines of American Strain families—that of Thomas Jefferson Strain and that of John Strain of Washington County, Tennessee—were related or not.   The project has since expanded to include other Strain families in America and abroad and recently received a sample from the Strayhorn family.  We hope to gather DNA samples from other families with similar surnames and determine whether these names are related and perhaps discover where these families originated.

 

Participants

 

The identities of the project participants are being concealed in order to protect their privacy.  However, those who have participated so far include descendants of the following individuals--

 

Aaron Strain of Macon County, Illinois (b. 1846) represented by sample #20902

 

Adolphus Middleton Strain of Georgia, represented by Sample #9965

 

Andrew Strain of Rowan County, North Carolina (bfr.1755-1826) represented by samples #16739 and #20928

 

Daniel Strain of County Down, Ireland, represented by Sample #13907

 

David Strain of Lancaster County, Pennsylvania (17??-1783) represented by Sample #36864 and #53897

 

David Strain of Lancaster County, Pennsylvania (17??-1783) represented by Sample #147819

 

David Strain/Strayhorn of County Antrim, Ireland (1743-1826) represented by Sample #42773

 

Gilbert Strayhorn of Orange County, North Carolina (1715-1803) represented by Sample #22700

 

Jacob Strain of Drumballyroney, County Down, Ireland (1861-) represented by sample #51065

 

James Strain of Parke County, Indiana (1763-1844) represented by sample #N12947

 

James Strain of South Carolina (1819-1895) represented by sample #82014

 

James Strain of Lancaster Country, South Carolina (1791-1859) represented by sample #188999

 

James Strain of Sangamon County, Illinois (1815-1849) represented by sample #73250

 

James Clifford Strain of Covington, Louisiana (18??-19??) represented by sample # 154011

 

James Harvey Strain of Marion County, Indiana (1822-) represented by sample # 142758

 

James S. Strein of White County, Tennessee and Gasconade County, Missouri (c. 1760-1844) represented by sample #4444

 

John Strain of Augusta County, Virginia (1754-1823) represented by sample #4443

 

John Strain of Washington County, Tennessee (1759-1840) represented by sample #9275

 

John Strain of Virginia/District 96, South Carolina (c. 1730-1765) represented by Samples #9647 and 29681

 

John H. Strain of Highland County, Ohio () represented by sample #41273

 

John Strain of Tennessee (c. 1809-?) represented by sample #149961

 

Peter Strain of County Down, Ireland, represented by Sample #13905

 

Robert Strean of Lancaster County, Pennsylvania (1756 - 1836) represented by Sample #9627

 

Robert Strain of Belfast, Northern Ireland (b. bfr WWII) represented by Sample #43671

 

Robert Strain of Drummully Parish, Fermanagh/Monaghan, Northern Ireland (circa 1820) represented by Sample #152025

 

Thomas Jefferson Strain of Cocke County, Tennessee and Pulaski County, Missouri (1808/9-1865) represented by sample #9605

 

William Charles Strain of Ballindrait, County Donegal, Ireland (b 1903 -) represented by sample #94962

 

William Henderson Strain of Blount County, Tennessee (c 1807 – 1886) represented by sample #59632 and #62744

 

 

William Strain (“The Founder”) of Ballynagappig, County Antrim, Ireland (1805-) represented by sample #67383

 

 

Procedure

 

The original participants selected Family Tree DNA (FTDNA) of Houston, Texas to perform the testing.   Most of the participants to date have been given FTDNA’s 25-marker Y-chromosome DNA test, which tests 25 markers on the Y-chromosome.  Some participants have also taken the extended 37-marker test.  These tests examine specific areas on the Y-chromosome—which is found only in males—where there are identifiable repetitions of particular DNA sequences (Short Tandem Repeats, or STRs).  The number of repetitions is counted and is listed as the value for that marker.

 

While most chromosomes are shuffled around from one generation to the next, the Y-chromosome is passed with little alteration down the male line of descent, from father to son to grandson, etc.  So when males of the same surname are tested it is possible to determine whether they might have descended from a common male ancestor by comparing these selected markers on their Y-chromosome.

 

However, periodically mutations can occur which cause subtle changes in the Y-chromosome.  The enzyme responsible for “copying” DNA may add or leave out one or more repetitions of a particular DNA sequence, or environmental factors may cause a mutation.  Currently Family Tree DNA estimates that one mutation occurs, on average, about every 500 years or about 20 generations, although some markers are believe to mutate somewhat faster and others somewhat slower.  These mutations are passed on from father to son.  Though the mutations are infrequent they are unpredictable, and it is even possible for brothers to have slightly different Y-chromosomes. 

   

Because it is not possible to accurately predict when these mutations will occur it is impossible to accurately determine the exact relationship of two individuals based on their DNA results.  Their interrelatedness can only be stated as a probability.  But the more similar the results are to each other the more likely it is that the individuals shared a common male ancestor in the more recent past, while the more different they are the more likely it is that the common male ancestor was more remote in time.

 

(For additional information on Y-DNA testing, go to www.familytreeDNA.com)

  

Results

 

The following table shows the results of the Y chromosome DNA tests that have been processed so far by Family Tree DNA. 

 

We assume (1) that the selected markers are dependable indicators of common ancestry, (2) that the test results are valid and no samples were contaminated, switched or misread, and  (3) that all participants are actually descendants of the ancestors they claim.

 

Each column labeled DYS# refers to a particular marker on the Y chromosome.  The numbers in each column are the number of DNA sequence repetitions (STRs) found at that marker.  Family Tree has used these values to predict each individual’s Haplogroup, although it is necessary to test other slower-mutating snippets of DNA to confirm the Haplogroup.  Haplogroup is useful in determining where in the world an individual’s ancestors might have lived—for example, R1b indicates Western European origins.

 

 

DYS#

 

#

Kit

Last Name

H
G

3
9
3

3
9
0

1
9

3
9
1

3
8
5
a

3
8
5
b

4
2
6

3
8
8

4
3
9

3
8
9
|
1

3
9
2

3
8
9
|
2

4
5
8

4
5
9
a

4
5
9
b

4
5
5

4
5
4

4
4
7

4
3
7

4
4
8

4
4
9

4
6
4
a

4
6
4
b

4
6
4
c

4
6
4
d

4
6
0

G
A
T
A

H
4

Y
C
A

I
I

a

Y
C
A

I
I

b

4
5
6

6
0
7

5
7
6

5
7
0

C
D
Y

a

C
D
Y

b

4
4
2

4
3
8

5
3
1

5
7
8

3
9
5
S
1
a

3
9
5
S
1
b

5
9
0

5
3
7

6
4
1

4
7
2

4
0
6
S
1

5
1
1

4
2
5

4
1
3
a

4
1
3
b

5
5
7

5
9
4

4
3
6

4
9
0

5
3
4

4
5
0

4
4
4

4
8
1

5  4    6    5   4   5   6  4   5

2  4    1    6   8   7   4   9  6

0  6    7   8    7   2   0   2  5

show/hide  Strain A

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N12947

James Strain, 1763-1844, IN

R1b1a2

13

23

14

11

11

15

12

12

12

13

13

29

17

9

10

11

11

25

15

19

29

15

15

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

154011

James Clifford Strain, d. 19??, LA

R1b1a2

13

23

15

11

11

14

12

12

12

13

13

29

15

9

10

11

11

25

15

19

30

15

16

16

18

11

10

19

22

16

15

17

17

38

39

12

12

11

9

15

16

8

10

10

8

10

10

12

22

23

16

10

12

12

16

8

12

22

2013 12 11 13 11 11 13 12

 

212312

Unknown Strain

R1b1a2

13

23

15

11

11

14

12

12

12

13

13

29

15

9

10

11

11

25

15

19

30

15

16

16

18

11

10

19

22

16

15

17

17

38

40

12

12

11

9

15

16

8

10

10

8

10

10

12

22

23

16

10

12

12

16

8

12

22

2013 12 11 13 11 11 13 12

 

9627

Robert Strean, d. 1753 PA

R1b1a2

13

24

14

10

11

14

12

12

12

12

14

28

18

9

10

11

11

26

15

19

29

14

15

17

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

43671

Robert Strain, NI

R1b1a2

13

24

14

10

11

14

12

12

12

12

14

28

18

9

10

11

11

26

15

19

29

15

15

17

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

241916

William Strahan, c 1765-1831

R1b1a2

13

24

14

10

11

14

12

12

12

12

14

28

15

9

10

11

11

26

15

19

29

15

15

17

18

11

10

19

23

16

15

17

18

36

39

12

12

11

9

15

16

8

10

10

8

10

10

12

23

23

16

10

12

12

15

8

12

22

2013 12 11 13 11 11 12 11

 

247232

Robert Strean, 1756-1836

R1b1a2

13

24

14

10

11

14

12

12

12

12

14

28

15

9

10

11

11

26

15

19

29

15

15

17

18

11

10

19

23

16

15

17

18

36

39

12

12

11

9

15

16

8

10

10

8

10

10

12

23

23

16

10

12

12

15

8

12

22

2013 12 11 13 11 11 12 11

 

225621

John Straghan, c 1750 Keady, NI

R1b1a2a1a1b3c1

13

24

14

10

11

14

12

12

12

12

14

28

15

9

10

11

11

26

15

19

29

15

15

17

18

11

10

19

23

16

15

17

18

36

39

12

12

11

9

15

16

8

11

10

8

10

10

12

23

23

16

10

12

12

15

8

12

22

2013 12 11 13 11 10 12 11

 

129223

Strain

R1b1a2

13

24

14

10

11

14

12

12

12

12

14

28

19

9

10

11

11

26

15

19

30

15

15

17

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

51065

Jacob Strain, b.1861, Drumballyroney, Co. Down, NI

R1b1a2

13

24

14

10

11

14

12

12

13

12

14

28

18

9

10

11

11

26

15

19

29

15

15

17

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

20902

Aaron Strain, b. 1846 IL

R1b1a2

13

24

14

10

11

15

12

12

12

12

13

28

17

9

10

10

12

25

15

19

29

15

15

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

show/hide  Strain B

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82014

James Strain, 1819-1895, SC

R1b1a2

13

24

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

188999

John Strain, b1791 Lancaster, SC

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

16

9

10

11

11

25

15

18

30

15

15

16

16

11

11

19

23

17

17

17

16

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

201560

Unknown Strain

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

16

9

10

11

11

25

15

18

30

15

15

16

16

11

11

19

23

17

17

17

16

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36864

David Strain, d 1783, PA

R1b1a2a1b4b

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

15

16

16

11

12

19

23

17

16

17

16

39

39

12

12

11

9

15

16

8

10

10

8

10

10

12

21

21

16

10

12

12

16

8

12

24

2013 12 11 13 11 11 12 12

 

42773

David Strayhorn, 1743-1826, Co Antrim, IRE

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

15

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

9275

John Strain, 1759-1841, PA>NC-TN

R1b1a2a1a1b4b

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

16

17

17

40

40

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

53897

David Strain, d. 1783, PA

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

12

19

23

17

16

17

16

39

39

12

12

 11

9

15

16

8

10

10

8

10

10

12

21

21

16

10

12

12

16

8

12

24

2013 12 11 13 11 11 12 12

 

133558

Unknown Strain

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

12

19

23

17

16

17

17

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

301945

John Strayen/Strain d1752 PA

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

12

19

23

17

16

17

17

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

211747

Unknown Strain

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

12

19

23

17

16

17

17

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

152025

Henry Strain 1805-1845 Ireland

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

26

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

278519

Unknown Strain

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

12

19

23

17

16

17

16

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22700

Gilbert Strayhorn, 1715-1843, PA>NC

R1b1a2

13

25

14

11

11

12

12

12

12

13

14

30

17

9

10

11

11

25

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

 

154882

Unknown Strain? (Baw/Buagh)

R1b1a2

13

25

14

11

11

14

12

12

12

13

13

29

16

9

9

11

11

25

15

19

29

15

16

16

17

11

11

19

19

16

14

16

17

36

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

show/hide  Strain C

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94962

Patrick Strain, b.c. 1830, Co Donegal, IRE

R1b1a2a1a1b4b

13

25

14

10

11

13

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

17

17

11

11

19

23

17

16

18

16

38

40

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

313530

William Strain

R1b1a2

13

25

14

11

11

13

12

12

11

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

17

18

17

37

39

12

12

 

N69666

John Strain, Highland Co. OH

R1b1a2

13

25

14

11

11

13

12

12

12

13

14

29

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

13907

Daniel Strain, b.c. 1785, Co Down, Ireland

R1b1a2

13

25

14

11

11

13

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

16

11

11

19

23

17

16

18

17

37

39

11

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

13905

Peter Strain, Co Down, NI

R1b1a2a1a1b4b

13

25

14

11

11

13

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

4443

John Strain, 1754-1823, VA

R1b1a2a1a1

13

25

14

11

11

13

12

12

13

13

14

29

18

9

10

11

11

25

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

show/hide  Strain D

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29681

John Strain 1730-1765, IRE>SC

R1b1a2

13

24

14

12

11

13

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

9647

John Strain 1730-1765, IRE>SC

R1b1a2

13

25

14

12

11

13

12

12

12

13

13

29

17

9

10

11

11

25

15

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

41273

John Strain, Highland Co, OH

R1b1a2

13

25

14

12

11

13

12

12

12

13

14

29

17

9

9

11

11

25

15

18

30

15

16

16

17

11

11

19

23

15

16

18

17

39

39

12

12

11

9

15

16

8

10

10

8

10

10

12

21

23

18

10

12

12

15

8

12

25

2013 12 11 13 11 11 12 12

 

142758

James H. Strain, b 1822, Marion Co, IN

R1b1a2a1a1b4b

13

25

14

12

11

13

12

12

12

14

14

30

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

16

16

18

17

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

show/hide  Strain E

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16739

Andrew Strain 1755-1826, NC

R1b1a2

13

25

15

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

14

18

30

15

16

16

17

11

11

19

23

17

16

18

17

38

39

12

12

 11

9

15

16

8

10

10

8

10

10

 

 

 

 

 

 

 

 

 

 

 

                

 

4444

James S. Strein, 1760-1844 TN> MO

R1b1a2

13

25

15

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

16

17

17

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

N112492

Unknown Strain? (Jesse Benson)

R1b1a1a1a1b1

13

25

15

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

16

17

17

39

39

12

12

 

73250

James Strain, 1815-1840 IL

R1b1a2

13

25

15

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

16

17

17

39

39

12

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

9605

Thomas Jefferson Strain, Sr 1808-1865 TN>MO

R1b1

13

25

15

11

11

12

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

16

17

17

39

39

12

12

11 

9

15

16

8

10

10

8

10

10

12

21

21

16

10

12

12

16

8

12

24

20 13 12 11 13 11 11 12 12

 

20928

Andrew Strain 1755-1826, NC

R1b1a2

13

25

15

11

11

12

12

12

12

13

14

29

18

9

10

11

11

25

14

18

30

15

16

16

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

67383

William Strain, 1803-, Co Antrim, IRE

R1b1a2

13

25

15

11

11

13

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

11

11

19

23

17

16

18

17

37

40

12

12

11 

9

15

16

8

10

10

8

10

10

12

21

23

16

10

12

12

16

8

12

25

20 13 12 11 13 11 11 12 12

show/hide  Strain F

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147819

David Strain, d. 1783, PA

R1a1a

13

24

16

10

11

14

12

12

11

13

11

29

14

9

10

11

11

24

14

20

32

12

14

15

16

11

12

19

24

16

16

17

18

36

39

12

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

149961

John Strain, d. 1809 TN

R1b1a2

13

25

14

10

11

14

12

12

11

14

13

30

18

9

9

11

11

24

14

19

30

15

15

17

18

11

11

19

23

16

15

19

17

37

37

12

12

11

9

15

16

8

10

10

8

10

10

12

22

23

15

9

12

12

15

8

12

21

2013 12 11 13 11 11 12 12

 

62744

William Henderson Strain, Blount Co, TN

R1a1a

13

25

16

11

11

14

12

12

10

13

12

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

232090

Unknown Strain

R1a1a1

13

25

16

11

11

14

12

12

10

13

12

30

13

9

10

11

11

24

14

20

31

12

15

15

16

11

11

19

22

16

16

17

18

36

40

12

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

59632

William Henderson Strain, Blount Co. TN

R1a1a

13

25

16

11

11

14

12

12

10

13

12

30

13

9

10

11

11

24

14

20

31

12

15

15

16

11

11

19

22

16

16

17

18

36

40

12

11

12

8

17

17

8

11

10

8

11

10

12

22

22

16

11

12

12

13

8

13

23

2112 12 11 13 10 11 12 13

 

229434

Unknown Strain? (Henry Houston Moore)

R1a1a

13

25

16

11

11

14

12

12

10

13

12

30

13

9

10

11

11

24

14

20

31

12

15

15

16

11

11

19

22

15

16

17

18

35

40

12

11

12

8

17

17

8

11

10

8

11

10

12

22

22

16

11

12

12

13

8

13

23

2112 12 11 13 10 11 12 12

show/hide  Strain Other

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9965

Adolphus Middleton Strain B. GA 1847

I2a

13

23

15

10

12

15

11

15

12

14

11

30

20

8

9

11

11

24

14

18

29

11

14

14

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                

 

 

 -10 

 -9 

 -8 

 -7 

 -6 

 -5 

 -4 

 -3 

 -2 

 -1 

Color Key for Stepwise Deviation from Modal

+1 

+2 

+3 

+4 

+5 

+6 

+7 

+8 

+9 

+10 

 

(Note from Family Tree DNA: It is obvious from our observation of 1000's of samples that some markers change or mutate at a faster rate than others. While that actual 'faster rate' has not yet been definitively calculated, not all markers should be treated the same for evaluation purposes.   The markers in red have shown a faster mutation rate then the average, and therefore these markers are very helpful at splitting lineages into sub sets, or branches, within your family tree.  Explained another way, if you match exactly on all of the markers except for one or a few of the markers we have determined mutate more quickly, then despite the mutation this mismatch only slightly decreases the probability of two people in your surname group who match 11/12 or even 23/25 of not sharing a recent common ancestor.)

 

According to FTDNA, a one-step difference in a single marker (or “genetic distance of one”) indicates a 50% probability that these families shared a common male ancestor within 18 generations, and a 95% probability of a common male ancestor within 52 generations.

 

Many of these test results are similar to the so-called Niall of the Nine Hostages DNA signature, as shown below:   

 

13

25

14

11

11

13

12

12

12

13

14

29

17

9

10

11

11

25

15

18

30

15

16

16

17

 

This DNA signature is similar to that of several other surnames originating in Ireland or Scotland.  In fact, one out of every twelve Irishmen may share this DNA signature.  

 

 

To Join

 

We believe that the more participants we have in this project, the clearer the picture will become as to who was related to whom.  So all male Strains—or males with similar surnames, such as Strahan or Strachan—are encouraged to join the project.

 

The cost of the 25-marker DNA test from FTDNA is $169, plus a few dollars more for shipping.  If you would like to join the Strain surname project, click on this link:

 

http://www.familytreedna.com/surname_join.asp?code=Y23147

 

Please be aware that unless you are a Strain male the results of Y-DNA testing will not be meaningful.  The Y-chromosome is not passed to females, so even if your mother was born a Strain you will not have received the Strain Y-chromosome from her.  You may instead want to consider instead the mtDNA test, also available from Family Tree DNA, which examines genetic material passed from the mother to her children.

 

Links

 

 

For more information on the Strains of Ireland, see Sean Strain’s website:

 

http://www.thestrains.org/sean.strain/Genealogy/Genealogy.htm