Not quite. R-U106 is currently thought to be a subgroup of R-P310 / R-L11.
The tree evolves, so it's worth checking the current thinking whenever you have a question. Here is the current (2015) tree for haplogroup R:
http://isogg.org/tree/ISOGG_HapgrpR.html
And here is an easy-to-use index of SNPs (2015):
http://isogg.org/tree/ISOGG_YDNA_SNP_Index.html
If your dad is R-L11 you probably want to move him to this project:
http://www.geni.com/projects/R-L11-S127-Y-DNA/12030
The lab codes are listed on the main page for the current ISOGG tree:
http://isogg.org/tree/index.html
According to https://www.yfull.com/tree/R-L151/, R-P310 (the clade which they call R-L151) is the immediate superclade of R-U106. Other subclades of R-L151 are R-A8051, R-S1200, and R-P312 (a large clade).
That is to say - of the people who have the P310 SNP, some of them have the U106 SNP, some have the P312 SNP, a very few have neither, and nobody has both.
YCC called for using shorthand SNP designations back in 2002. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC155271/
FTDNA converted to YCC shorthand SNP tree in 2012. https://forums.familytreedna.com/forum/paternal-lineages-y-dna/pate...
YCC shorthand conversion table: https://en.wikipedia.org/wiki/Conversion_table_for_Y_chromosome_hap...
It is recommended you submit Family Tree DNA Big Y-500 BAM to http://haplogroup-r.org/submit.html & https://yfull.com/order/ for analysis.
https://www.familytreedna.com/public/y-dna-haplotree/R;name=R-P310 & https://www.yfull.com/tree/R-L52/ seem to be the best reference trees.
Private User I'm surprised your final FTDNA Big Y-500 SNP is R-P310.
There are only 2 people on https://www.familytreedna.com/public/y-dna-haplotree/R;name=R-P310 & https://www.yfull.com/tree/R-L52/ that don't also show positive for R-L151 & one of the major downstream SNP branches: R-P312, R-U106, R-S1194, R-A8039, R-A8053 or R-S1200.
Did you submit your Big Y-500 BAM to http://haplogroup-r.org/submit.html & https://yfull.com/order/ for analysis?
L52/P310/S129 is a very ancient SNP. I think it is likely you well test further downstream with a private SNP (Non-Matching Variant at FTDNA & Novel SNP at Yfull) once more matches corroborate that SNP branch and the Ytree is further developed.
Family Tree DNA currently lists 407,624 SNP variants under Big Y-500. You also have up to 561 STR variants (Panels 1-5 STR 1-111 & Panel 6 STR 112-561) under Big Y-500. That is a lot of loci for comparison.
Please ask the gentlemen of Iraqi origin to share his Big Y-500 BAM at http://haplogroup-r.org/submit.html & https://yfull.com/order/ for analysis. It takes FTDNA a few days to create the BAM file once requested.
https://dna-explained.com/2019/01/30/the-big-y-test-increases-again...
Family Tree DNA just announced the Big Y-700 which replaces the Big Y-500.
Pending Big Y-500 & all orders after November 1, 2018 will automatically be upgraded to the new Big Y-700.
New chemistry used provides better, more uniform coverage and includes a much broader target region.
- Quality reads of regions previously unavailable
- More consistent results
- Fewer no-reads
- Allows for more STRs to be accessed and reliably read.
https://gizmodo.com/familytreedna-hands-the-fbi-access-to-its-datab...
You have to wonder if this new chemistry & tech has anything to do with Family Tree DNA’s partnership with the FBI. 700 STRs per person is a forensic goldmine.