Go Back   Family Tree DNA Forums > Paternal Lineages (Y-DNA) > BIG Y and SNP Discovery

BIG Y and SNP Discovery This area is for talk about BIG Y results.

Reply
 
Thread Tools Display Modes
  #1  
Old 4th May 2018, 03:42 PM
Svein Davidsen Svein Davidsen is offline
FTDNA Customer
 
Join Date: Jun 2005
Location: Switzerland and France
Posts: 135
Updating/Changing (?) of terminal SNP

My BigY result classify me as Hg N-Y17416. Among my 4 “bottom step matches” were 3 with an additional mutation, Y17415. Last week FTDNA changed/updated one of them to Y17652. Looking at the FTDNA phylogenetic tree – on my account - the Y17415 branch is the one below mine, but among the 9 “More” listed SNP they have Y17652.
On the other person’s tree FTDNA call this branch Y17652 with Y17415 in Blue. Does this imply that FTDNA have had second thoughts about the quality off the initial Y17415 interpretation? On the “step” results however he is listed as Y17415, as is the YFull result.

How should we interpret this?
Reply With Quote
  #2  
Old 7th May 2018, 02:25 PM
Svein Davidsen Svein Davidsen is offline
FTDNA Customer
 
Join Date: Jun 2005
Location: Switzerland and France
Posts: 135
No one with any suggestions?

Anyway, I finally managed to access the FTDNA Big Y500 SNP file for my match cousin, and he is positive for all SNPs for the Y17415 branch, but not actually for Y17415! On YFull, using the VCF file from FTDNA, he is positive for all SNPs for the Y17415 branch, including Y17415, all at 5* quality. I can only explain that by suggesting a matching algorithm mistake from FTDNA.

Comments, suggestions, etc, please.
Reply With Quote
  #3  
Old 13th May 2018, 06:21 AM
wkauffman wkauffman is offline
FTDNA Customer
 
Join Date: Feb 2011
Posts: 157
The called results could be different from what was expected due to quality, and corresponding coverage, differences between the initial samples. Looking at the the VCF files should show whether there was a significant difference in the quality of the calls. Viewing the BAM files won't provide much more detail over what is listed in the VCF file.

IF the variants are important to establishing the structure then acquiring individual test results, if they are individually testable, will be the best way to answer the question.
Reply With Quote
  #4  
Old 15th May 2018, 12:39 PM
Svein Davidsen Svein Davidsen is offline
FTDNA Customer
 
Join Date: Jun 2005
Location: Switzerland and France
Posts: 135
Thank you wkauffman,

I have asked the tester to check with FTDNA first to see if they believe their analysis is correct. If that is positive we will have to look at the VCF files ourselves as you suggest.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Updating due to errors? Obriejen Features Requests & Bug Reports Area 2 29th August 2017 09:31 PM
Updating 23andMe transfers rdegnen DNA and Genealogy for Beginners 25 9th February 2013 03:26 PM
are they updating the haplotree? Osiris Paternal Lineage (Y-DNA STR) Advanced 6 25th September 2012 04:08 PM
timeframe on updating markers jbh DNA and Genealogy for Beginners 12 4th November 2009 11:17 PM


All times are GMT -5. The time now is 11:37 PM.


Family Tree DNA - World Headquarters

1445 North Loop West, Suite 820
Houston, Texas 77008, USA

Phone: (713) 868-1438 | Fax: (832) 201-7147
Copyright 2001-2010 Genealogy by Genetics, Ltd.
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.