Re: Triangulated DNA matches and Pile-up Areas #dna


Lee Jaffe
 

As a belated follow-up to this discussion, I want to say that I've decided that using triangulation effectively is outside of my wheelhouse.  I've looked at the guides, taken many seminars, followed the suggested strategies, prioritized my matches, created tables and chromosome maps, and stared at tens of thousands of data points and ... nothing.  I won't go into all of the hurdles and traps I've encountered trying to establish whether or not parties share triangulated segments: generally, just because sets of segments look triangulated doesn't mean they are, and vice versa.  And, to top it off, even when you have identified sets which are triangulated, it isn't clear that they are significant.  

I'm not a naive user.  I've added hundreds of members to my family tree, prompted by DNA matches.  Yet never once has triangulation played a significant role nor has DNA made a conclusive case. Instead, I've come to think of like the game "Marco/Polo".  When you post your DNA test results, you are essentially calling out "Marco" and listening for someone else's test to respond "Polo."  You have a vague idea of distance and direction, but success ultimately does not depend on further DNA analysis, at least not alone.  Over and over, it's been a case of a match – often those which fall below the thresholds experts recommend – highlighting a person whose family surnames or town name or some other clue suggest further examination.  Then it's a matter of cooperation, sharing trees or offering to ask an aunt who might remember ... and one day they send you a photo of a mutual great-great-grandparent.  (It's happened, more than one, really.)  But without the cooperation, all the DNA evidence has gotten me nowhere.  


Lee Jaffe
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Surnames / Towns:  Jaffe / Suchowola, Poland ; Stein (Sztejnsapir) / Bialystok and Rajgrod ; Roterozen / Rajgrod ; Joroff (Jaroff, Zarov) / Chernigov, Ukraine ; Schwartz (Schwarzstein) / Ternivka, Ukraine ;  Weinblatt / Brooklyn, Perth Amboy, NJ ; Koshkin / Snovsk, Ukraine ; Rappoport / ? ; Braun / Wizajny, Suwalki,  Ludwinowski / Wizajny, Suwalki

 

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