I-Y33765 draft tree November 12th 2020

This is our latest draft phylogenetic tree for I-Y33765.  

The chart includes 6 new SNPs common to the English arm of I-Y33765. These have recently been identified and named by FTDNA (FT310619; FT314713; FT314945; FT321056; FT324244) and YFull (Y207591) from comparison of Big Y-700 data for FTDNA kit numbers 236748 and IN82043.  This means that at present there are 19 phylogenetically significant mutations on the English arm and this total is approximately twice the number so far identified on the Swedish arm.  At present the reason for this difference in mutation frequency is unclear but I intend to explore some possible explanations in a future article.

FTDNA consider that one of their new SNPs, FT310619, is the confirmed haplogroup for Clement IN82043.  Prior to identifying their five new SNPs they had used Y33767 as the confirmed haplogroup for Clement IN82043 and this is shown on our latest I-Y33765 tree (below).  As FT310619 and Y33767 are phyloequivalent either designation is valid at present. In this connection Bernie Cullen (I2a Project activity feed, 10 November 2020) has observed "These SNPs are equivalent, maybe FTDNA prefers to use FT series SNPs to name branches." It seems to me that as Y33767 was identified and named by YFull in 2017, but FTDNA has only just named FT310619, the earlier YFull SNP designation is more appropriate for the branch name. From his Big Y-700 analysis Clement IN82043 also has one private variant (Hg38, 15198490) and this has now been named Y223449 by YFull.

Within the past few days Yseq have tested Clements YS32054 for the Y33767 SNP and have confirmed his status is derived (+).    This finding supports my hypothesis the Clement/s lineages on the English arm share a most recent common ancestor who was living in north Somerset, perhaps in the Chew valley, towards the close of the fifteenth century.  

Click on chart to enlarge

I-Y33765 draft tree November 1st 2020

This is our latest draft phylogenetic tree for I-Y33765.  

The chart includes information for SNPs following the completion of a Big Y-700 analysis for Clement IN82043 and confirmation for Clement YS32045 of his derived status for Y33765 following a YSeq assay for that SNP.

On the Swedish, FT250135, arm of I-Y33765 Mr Hallberg has recently ordered a FTDNA Big Y-700 analysis.  This is the third Big Y-700 test on this branch and will be helpful in improving age estimates for the divergence between our four Swedish lineages which are, at present, largely based on STR results.  Also, on the English, Y33767 arm of I-Y33765 we intend shortly to test Clements YS32054 for the Y33767 SNP at YSeq.  At present we speculate that his lineage (as implied by the chart) has also diverged at Y33767.

The dates included are based either on the YFull age estimation methodology or on FTDNA TiP estimates or on known dates from documented genealogy.  The estimated dates are only a very approximate guide to the age of branches and are most likely to have significant  errors.  The dates of branches will probably be revised in subsequent drafts.

 Click on chart to enlarge