Gedmatch - don't understand the match indicators

[nestagj]

Hello can anyone decipher this for me.  It is a recent match on gedmatch using one to one I have printed off the whole one to one comparison - I'm sorry due to confidentiality I cannot say much more on the public forum.    but we think we know what the relationship is......

I have printed off the whole one to one comparison

Largest segment = 165.8 cM
Total of segments > 7 cM = 1,460.0 cM
30 matching segments
Estimated number of generations to MRCA = 1.6

407966 SNPs used for this comparison.

Thank you very much

[jim1]

Have you seen this:
http://moodle.dnagedcom.com/MoodleClass/DNAadoption/UsingGEDMATCHRevised3-2014.pdf

[Gadget]

I'd estimate that the relationship is 1st-2nd cousin with 1 or 2 removes.
The link Jim has given, gives all the details. Also

https://sites.google.com/site/wheatonsurname/beginners-guide-to-genetic-genealogy

and

http://www.genie1.com.au/blog/78-tips-for-using-gedmatch


Gadget

[davidft]

Hello can anyone decipher this for me.  It is a recent match on gedmatch using one to one I have printed off the whole one to one comparison - I'm sorry due to confidentiality I cannot say much more on the public forum.    but we think we know what the relationship is......

I have printed off the whole one to one comparison

Largest segment = 165.8 cM
Total of segments > 7 cM = 1,460.0 cM
30 matching segments
Estimated number of generations to MRCA = 1.6

407966 SNPs used for this comparison.

Thank you very much

The two most important things there are the distance to MRCA (Most Common Recent Ancestor) which at 1.6 means it is a very close relation say something like Aunt/Uncle to Niece/Nephew (could also be a half sibling!), and the total number of segments which at 1460cM is about 20% in common.


This link explains it more and has a helpful table

https://isogg.org/wiki/Autosomal_DNA_statistics

[nestagj]

Thank you very much for your replies.

Could it be a half sibling ?

Nesta

[nestagj]

Oh dear even more confused now !

[/quote]

The two most important things there are the distance to MRCA (Most Common Recent Ancestor) which at 1.6 means it is a very close relation say something like Aunt/Uncle to Niece/Nephew (could also be a half sibling!), and the total number of segments which at 1460cM is about 20% in common.


This link explains it more and has a helpful table

https://isogg.org/wiki/Autosomal_DNA_statistics
[/quote]

[davidft]

nestagj

Yes it could be a half sibling.

Look at the colour coded table and study that a little rather than reading all the wordage and it might become clearer

[Gadget]

Just to say that most of my matches with a similar result are  1st-2nd cousin with 1 or 2 removes. My great nephew has much closer results.


Gadget

[Gadget]

Half siblings would be much higher - average of 1600-1700cM -ish or have I mis-read??


Gadget

Added - I mis read, I see your total cM is 1460 my great nephew is 1100 cM