When did the two Sardinian clusters of R-M18 separate?


Posts: 2341
Joined: Sun Mar 18, 2012 7:08 am
Location: Pisa (Italy)
YDNA:
R- Z2110 (KV7Y2)
MtDNA:
K1a1b1e/HQ176413
PostPosted: Sun Jan 28, 2018 10:32 am
As to YFull, the haplogroup R-V88 formed 17100 YBP and after 61 SNPs (after V88) it separated in R-V88* (samples found in Great Britain: Sexton, and in Italy: Marchesi) and R-V88-M18 (samples found and tested so far only in Sardinia and Corsica. We have no data about the presumed samples found in Druzes). The separation would be happened 11800 years ago.
17100 – 11800 = 5800
5800 : 61 = 95 years each SNP
The two Sardinian subclades of R-V88 would have 36 SNPs in common beyond M18. When did they separate?
Sample 1168 (cluster 1) has beyond them 73 + 13 SNPs = 123.
Sample 1178 (cluster 2) has beyond them 65 + 1 +7 =110.
Even though we gets the mean (123 +110) :2 = 116.5
Thus, if we take 1950 AD as to the birth of these two persons, we have:
11800 : 116,5 = 66.4 years.
If we consider all the SNPs of these Sardinian R-M18 from the origin of R-V88* (17100 YBP) we get 116.5 +61 = 177.5.
17100 : 177.5 = 96 years each SNP. Then
Separation between R-V88* and R-M18* = 96 x 61 = 5856 (17100 – 5856 = 11244)
Separation of the two Sardinian clusters of R-V88-M18
96 x 37 = 3552, i.e. 11244 – 3552 = 7692 YBP
In fact: 96 x [(86 + 73):2] = the date of birth of the two Sardinian samples we may assume around 1950 or little after or before.

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