The document discusses YSNP haplotrees and SNP packs at Family Tree DNA (FTDNA). It notes that the yHaplotree currently has over 23,000 SNPs and 6,728 haplogroup labels, up significantly from 2015. SNP packs are carefully designed panels of relevant SNPs that allow testers to efficiently move down the haplotree, though they cannot discover new haplogroups. There are currently over 75 active SNP packs covering 8 major haplogroups. The process for developing and validating new SNP packs is also outlined.

1. YSNPs, Packs and Trees
 Resurgence of the FTDNA yHaplotree
 SNP Packs - A status update

2. Haplotree today
 May 2015 – 6,556 SNPs
 Today – 23,767 SNPs
 Unique haplogroup labels – 6,728
 Total “terminal nodes” – 3,192

3. Haplotree update guidelines
 1. SNP Name*, position (hg19), mutation
 2. Proposed phylogeny/SNP positioning
 3. Provide kit proofs
 4. Avoid heavily recurrent, STR embedded,
and other unreliable SNPs.
 5. Must be FTDNA generated data
 6. No private SNPs (2+ required)

4. SNP Packs – An Overview
 Carefully designed panel
of SNPs relevant and
encompassing to a
specific group (M343,
L21 etc.)
 Cost efficient method to
move a tester down the
tree
 Can match – Can NOT
discover*

5. SNP Packs
 77 active panels (~35 in
design)
 8 haplogroups (E, G, I,
J, N, Q, R,T)

6. SNP pack process
 Admins submit panel proposal (140 max)
 Computational QC (Dr. Nossa)
 Phylogenetic analysis, tree building
 Validation
 Content finalization
 Release

7. Questions?
 I have a BigY, do I need a SNP Pack?
 Can I buy just one SNP?