The autosomal matching methodology of the genetic genealogy establishment is built on a bad foundation. I've used short segment matching from the start and my results have been completely consistent. I have found that the chances of a false matching segment with my regular autosomal parameters of 250 SNP's and 1 cM minimum segment are just about zilch. You still have to triangulate and figure out where the lines intersect in the space-time continuum, but a 1 cM segment works just fine. I've been making connections over 300 years back, while others are just engaged in sophistry about whether a segment is IBD or IBS. I'll give more details later, and I still owe an explanation for Thomas Lovelace / Eleanor Evans. If you don't have a paternal line to go with, I definitely would order the Family Finder test. Jack Wyatt

Greg Triangulation is just three or more people matching on the same segment. If you have two people match, you may presume that the line is where the obvious tree match is. I find that many of my matches actually have two or three tree matches, so there is no way to know which of those matches the particular segment comes from. But if you find a third person who matches that segment and only matches one part of the tree, then you can "triangulate" that match like a 3-legged stool and get a statistical certainty that the particular DNA segment is from that ancestral line. In the Lovel*** analysis I have a number of people that match Tom Cates, and a number that match Bob Cates, but I don't have yet someone who matches both Tom and Bob on the same segment. If they did, I would know it would have to be through the Cates or Lovel*** lines. So if the person we matched with did not appear to have any Cates/Berry+++ ancestry, we would know that the match is on Lovel***. For genetic genealogy they say test everyone. I love 2nd cousins, because they match enough to be really certain, and you isolate your line through one set of great grandparents so you know where to look when a third cousin matches both of you. L On Mon, Jul 4, 2016 at 8:02 AM, Jack Wyatt via <lovelace@rootsweb.com> wrote: > The autosomal matching methodology of the genetic genealogy establishment > is built on a bad foundation. > I've used short segment matching from the start and my results have been > completely consistent. I have found that the chances of a false matching > segment with my regular autosomal parameters of 250 SNP's and 1 cM minimum > segment are just about zilch. You still have to triangulate and figure out > where the lines intersect in the space-time continuum, but a 1 cM segment > works just fine. I've been making connections over 300 years back, while > others are just engaged in sophistry about whether a segment is IBD or IBS. > I'll give more details later, and I still owe an explanation for Thomas > Lovelace / Eleanor Evans. If you don't have a paternal line to go with, I > definitely would order the Family Finder test. > Jack Wyatt > > > ------------------------------- > To unsubscribe from the list, please send an email to > LOVELACE-request@rootsweb.com with the word 'unsubscribe' without the > quotes in the subject and the body of the message >

Lenny, What about when the segments don't match exactly, but overlap. How does that affect the interpretation? Peace, Part of the Tree, Greg -----Original Message----- From: lovelace-bounces@rootsweb.com [mailto:lovelace-bounces@rootsweb.com] On Behalf Of Lenny Darnell via Sent: Monday, July 4, 2016 11:39 AM To: Jack Wyatt <cjwyatt@bellsouth.net>; lovelace@rootsweb.com Subject: Re: [LL] autosomal dna Greg Triangulation is just three or more people matching on the same segment. <<snip>>

Greg I have found very few that match exactly with three people. You just want one part that overlaps with all three people. 2nd cousins tend to have large segments 35cM or more. So if you find someone that matches on that part of the tree but much higher that has some subset of that match, that works pretty well. If the third cousin has a tree match and DNA match, I am happy with small segments 3-4 cM or so. I have matches I am happy with where the common amount is about 3cM where the 3-way match is all 7cM or more. As we get GEDMatch in from this group, we will start to see these patterns, I'm sure. L On Mon, Jul 4, 2016 at 12:35 PM, Greg Lovelace <greg@part-of-the-tree.com> wrote: > Lenny, > > What about when the segments don't match exactly, but overlap. How does > that affect the interpretation? > > Peace, > Part of the Tree, > Greg > > -----Original Message----- > From: lovelace-bounces@rootsweb.com [mailto:lovelace-bounces@rootsweb.com] > On Behalf Of Lenny Darnell via > Sent: Monday, July 4, 2016 11:39 AM > To: Jack Wyatt <cjwyatt@bellsouth.net>; lovelace@rootsweb.com > Subject: Re: [LL] autosomal dna > > Greg > > Triangulation is just three or more people matching on the same segment. > <<snip>> > >