TESTING FOR HAPLOGROUP G SUBCLADES

 

Since Haplogroup G is fairly rare, you shouldn’t try the SNP test that defines G unless your STR values suggest that you are really in G.  The following table can help you decide if a M201 test would be worthwhile.

 

 

Typical G STR Motifs:

 

 

DYS

393

390

019

391

426

388

392

Primary

Motif

14

22

15

10

11

12

11

Other Values

With Freq (%)

13 (25)

21

(30)

14

(8)

8

(2)

 

13

(8)

10

(15)

15

(16)

23

(30)

16

(16)

11

(6)

 

11

(1)

12

(15)

 

24

(4)

17

(2)

 

 

 

 

 

 

The defining marker for Haplogroup G is M201.  If you believe that you’re probably G, M201 is the first SNP to test.  If negative, try another haplogroup, such as I or J, but if positive, then continue as follows:

 

Most Europeans who are members of Haplogroup G (representing only 1-3% of total male population), including those in Turkey, are more likely to be in subclade G2 rather than G1.  Among Jews who are in G, however, about three times as many are in G1 as in G2.  If unsure whether G1 or G2 would be more likely, then check the following STR values: Subtract your value for DYS-392 from your value for DYS-393, and if the result is ≥ 3, then start with G2, which means testing the SNP, P15.  If the difference is one or less, then start with G1, which means testing the SNP M342.  If the first SNP test is negative, then try the other.  If both are negative, you may wish to test for the rare SNP M287 (subclade G3), but note that only one person has ever been found in G3.

 

If P15+, then continue with the G2 subclades, starting with G2a using the SNP, P16.  If positive, continue with P17.  If P16+ and P17+, then you’re in G2a1.  If P16+ and P17-, then you’re in G2a*.  If P16-, then test M286; if M286+, then you’re G2b, but if M286-, then you’re G2*.

 

If M342+, then continue with the G1 subclades, first testing the SNP, P20.  If P20+, then you’re in G1a.  If P20-, then you’re in G1*.

 

If M287+, then you’re in G3 (and welcome to a very exclusive club).  If P15- and M342- and M287-, then you’re not in G1, G2, or G3, but in G*.  If you are P15- and M342-, but you didn’t test M287, then you’re still highly likely to be in G*.