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I am going to start out with some very provocative points. I am prepared to defend each of them vigorously.
> 1 cM segments are highly reliable and the danger of false positives is non-existant (unless you set the SNP's absurdly low).
> pile-up's have meaning, but dismissing them as aberrations is easier than finding the meaning.
> the majority of people who have 19th Century or earlier USA or American Colonial ties are related to each other with common ancestry in an 18th Century, extralegal slavery and bride selling operation in a part of North Carolina.
Concerning 1.0 cM minimum segment matches, look at this item fron Felix Immanual:
My take is that as long as you chose your SNP level correctly, short segments (as low as 1.0 cM) do not have a problem with noise. I also attempted my own crude experiment to determine if you got any noise with 1.0 cM minimum segments. It can be found at:
GEDmatch Forums > DNA Utilities --> Interpreting DNA Comprison Results
Subject: short segment matching experiment
Only one or two people come up with kits that seemingly were not related to me. The best example was a person whose both sets of grandparents are from South East Nigeria. At my usual parameters of 250 SNP's and 1.0 cM minimum segment size, the result was 0.0 cm total of matching segments 1.0 cM or larger and 0.0 cM largest matching segment size. If you think about it, if the particular parameters used had a danger of creating false positive segments through a stochastical process, getting results of (0.0, 0.0) would be nearly impossible (you would always pick up some false-positive segments). I decided to see what would happen when I lowered the parameters to 100 SNP's with the 1.0 cM minimum segment. I finally got some matching segments to pop out. False positives you might say, but a couple of them were ones that I recognize which might have a connection back to Africa. Was it my slight amount of African heritage coming out? Maybe.
The other person that I had a small match with was mostly Asian, but when we compared, some of our matching segments had meaning to me that connected him to the slavery and bride selling operation in North Carolina. Apparently his circa 1800 ancestor who was a refugee from the slave ring made his way to Mexico, then a later descendant on to the Philippines. I believe the other seven or so kits that posters contributed had matches with me with totals of matching segment above 300.0 cM and also had X-DNA matches to my mother. At this level of total matching segments, they all likely have several connections with me, mostly through the slavery and bride selling operation in the last point.
As for the second point, consider the meaningful pileups and hot spots you will see in the third point.
How did I come to the notion of the extralegal slavery and bride selling ring? I certainly did not dream it up and lower the parameters to prove it as a professional insinuated. My imagination is not that great. Basically I just started out, got past brick walls, and built on what I had. When my mother tested (she is from Canada), it became clear that she had a line that traced back to a North Carolina slave plantation on the slave side of the fence. Interesting my father had male relatives on the other side. That put me in a unique position to figure out what was going on. The findings since have been astounding and have great significance, both for genealogy and history.
I would like some help in proving or disproving my hypothesis that I am related to the majority of people who have American ties, say prior to 1900, mostly through this slavery ring in North Carolina. The corollary is that the majority of people with 19th Century or earlier American ties are related to each other. If your earliest ties are later than that, feel free to participate too, but just note what your earliest connection is.
My kit on GEDmatch is F239841. Please set parameters to 250 SNP's and 1.0 cM minimum segment size for the 'one to one' comparison. My mother's kit is F367106. Please do an X 'one to one' comparison with her with SNP's at 150 and also a 1.0 minimum segment. You maybe related to me but not get an X-DNA match with my mother because two males in a row will eliminate the possibility of an X-DNA match. Please just give your kit number and for the two tests the total of matching segments and the largest segment size. Please do not copy all of the individual matches as the length of the thread will get out of hand. If you have not uploaded your kit to GEDmatch, this might be a good excuse for doing that.
I appreciate everyone's cooperation with this and am eagerly awaiting the results.
Jack
> 1 cM segments are highly reliable and the danger of false positives is non-existant (unless you set the SNP's absurdly low).
> pile-up's have meaning, but dismissing them as aberrations is easier than finding the meaning.
> the majority of people who have 19th Century or earlier USA or American Colonial ties are related to each other with common ancestry in an 18th Century, extralegal slavery and bride selling operation in a part of North Carolina.
Concerning 1.0 cM minimum segment matches, look at this item fron Felix Immanual:
My take is that as long as you chose your SNP level correctly, short segments (as low as 1.0 cM) do not have a problem with noise. I also attempted my own crude experiment to determine if you got any noise with 1.0 cM minimum segments. It can be found at:
GEDmatch Forums > DNA Utilities --> Interpreting DNA Comprison Results
Subject: short segment matching experiment
Only one or two people come up with kits that seemingly were not related to me. The best example was a person whose both sets of grandparents are from South East Nigeria. At my usual parameters of 250 SNP's and 1.0 cM minimum segment size, the result was 0.0 cm total of matching segments 1.0 cM or larger and 0.0 cM largest matching segment size. If you think about it, if the particular parameters used had a danger of creating false positive segments through a stochastical process, getting results of (0.0, 0.0) would be nearly impossible (you would always pick up some false-positive segments). I decided to see what would happen when I lowered the parameters to 100 SNP's with the 1.0 cM minimum segment. I finally got some matching segments to pop out. False positives you might say, but a couple of them were ones that I recognize which might have a connection back to Africa. Was it my slight amount of African heritage coming out? Maybe.
The other person that I had a small match with was mostly Asian, but when we compared, some of our matching segments had meaning to me that connected him to the slavery and bride selling operation in North Carolina. Apparently his circa 1800 ancestor who was a refugee from the slave ring made his way to Mexico, then a later descendant on to the Philippines. I believe the other seven or so kits that posters contributed had matches with me with totals of matching segment above 300.0 cM and also had X-DNA matches to my mother. At this level of total matching segments, they all likely have several connections with me, mostly through the slavery and bride selling operation in the last point.
As for the second point, consider the meaningful pileups and hot spots you will see in the third point.
How did I come to the notion of the extralegal slavery and bride selling ring? I certainly did not dream it up and lower the parameters to prove it as a professional insinuated. My imagination is not that great. Basically I just started out, got past brick walls, and built on what I had. When my mother tested (she is from Canada), it became clear that she had a line that traced back to a North Carolina slave plantation on the slave side of the fence. Interesting my father had male relatives on the other side. That put me in a unique position to figure out what was going on. The findings since have been astounding and have great significance, both for genealogy and history.
I would like some help in proving or disproving my hypothesis that I am related to the majority of people who have American ties, say prior to 1900, mostly through this slavery ring in North Carolina. The corollary is that the majority of people with 19th Century or earlier American ties are related to each other. If your earliest ties are later than that, feel free to participate too, but just note what your earliest connection is.
My kit on GEDmatch is F239841. Please set parameters to 250 SNP's and 1.0 cM minimum segment size for the 'one to one' comparison. My mother's kit is F367106. Please do an X 'one to one' comparison with her with SNP's at 150 and also a 1.0 minimum segment. You maybe related to me but not get an X-DNA match with my mother because two males in a row will eliminate the possibility of an X-DNA match. Please just give your kit number and for the two tests the total of matching segments and the largest segment size. Please do not copy all of the individual matches as the length of the thread will get out of hand. If you have not uploaded your kit to GEDmatch, this might be a good excuse for doing that.
I appreciate everyone's cooperation with this and am eagerly awaiting the results.
Jack
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