posted
You can pretty much replace R with T but this is from an old study.
xDE = from B but not DE.That could be any branch of B until you get (,JR). (,JR) is the range of J-R. What branch of B connects with the range of J-R but C and the range of J-R or J-T =F.
BR*(xDE, JR) = CF* right? I add the * because its obviously unidentified.
Posts: 1254 | From: howdy | Registered: Mar 2014
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Best way to be clear is check the SNPs actually tested in the study ('Y chromosome typing' in 'Methods'). 92R7 (P), M9 (K), M13 (A1b1b2b), M17 (R1a1a), M20 (L), SRY+465 (O2b), SRY4064 (E), SRY10831 (BT but back-mutates in R1a1), sY81 (E1b1a1), Tat (N1c1), YAP (DE), M191 (old E1b1a7), U175 (old E1b1a8), and P12f2 (J). So BR*(xDE, JR) is BT(xDE, J, K); K* is K(xL, N1c1, O1b, P); P* is P(xR1a1).
BT(xDE, J, K) includes all of B, C, F2, G, H, and I (of what's known to exist).
In Nigeria and Cameroon we will certainly expect to find B, specifically B1 and B2a (Pygmies have B2b but I don't know if other groups do). Unfortunately this study tested only 6 STRs and the region is not well sampled, so there's no way to tell for sure what it is. About half of it is a cluster with DYS388=10, with haplotypes matching or close to known B2a haplotypes, so I'd guess most or all of that cluster is B2a. The rest has mostly pretty average STR values, so could be practically anything really.
The obvious thing for K*(xP) in Africa is T, which is widespread, and the STRs do match T very well.
The obvious thing for P(xR1a1) is R1b-V88, and the STRs have regular R1 values. But with only 6 STRs you can't tell subclades apart. One of the Ewe has Atlantic Modal Haplotype (extremely common in West European R1b-M269) but that can also be found in R1b-V88. Anyway R1b-V88 is definitely around there so that's the first assumption.
Oh yeah and the A(xA1b1b2b) looks like A0.
Posts: 660 | From: Canada | Registered: Mar 2017
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posted
If it includes all of B but not D and E doesn't that mean its downstream from C towards F?
Posts: 1254 | From: howdy | Registered: Mar 2014
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posted
No, they were not tested for any SNPs at the CT, CF, F, or C levels, so the only things within BT that are excluded are DE, J, and K (with their respective subclades). B is not a subclade of DE, J, or K, so if they are negative it says nothing about B one way or the other.
As the paper you quoted says, "it is likely that at least one of these [clusters] represent the sub-Saharan African-specific Haplogroup B". In fact *all* of them could be B: B1 and B2a are both present in the area, and fall into entirely different STR clusters. One Igbo in this study has a match in the handful of B1 haplotypes from the FTDNA B Project, but 6 STRs is not much better than goat entrails.
It is surely possible that rare CF* exists in Africa - why not? - but this contains zero evidence for it.
Posts: 660 | From: Canada | Registered: Mar 2017
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