What's new at GEDmatch as of April, 2022
All my slides are always online at
The new modern looking site is live and some features are only on the "New" site... which works on phones and tablets as well as PCs
-
Better HELP plus popups for new users
-
Monthly Newsletter
-
Relationship Calculator
-
Search the GEDcoms of your matches for common ancestors!
-
Auto Segment
-
Auto Kinship includes Clustering from E.J.Blom
-
Auto Trees
-
Link your kit to the MitoYDNA site
Much More HELP
The new home page has more help for new users plus messages about what's new
Both the New user? Watch "How To Use GEDmatch" and the
How to use GEDmatch come to this information page
Note the tabs to find more information
The GEDmatch Education page mixes videos and blogs on various specific topics
Using a new free account I discovered that a nice help window pops up the first time I use the one to many tool
The first time you request the one to many results also gets this help box
Plus a link to a video from Family History Fanatics
And another help box pops up when you click Tips
Click Tips to get this popup box
Haplogroups can now be linked to MitoYDNA.org
A link and an icon shows when a kit has its haplogroup linked to its kit at MitoYDNA.org
On the edit kit page you add the MitoYDNA kit number below the haplogroup
If you have put Y or mtDNA results at mitoYDNA.org
you can link that information to the kit it goes with
by clicking on the pencil to edit that kit
Now click the green Change button to save it, then the next day it will show up on your matches' one to many
New Relationship
Prediction Tool !!
Text
Text
How is my niece's match of 1647 cM related to her?
Notice these are listed in order of how close, not in the order of probability
Text
Two woman with the same father will share a full X
The Four Largest Segments
My initial study of 25% relationships did not separate maternal and paternal niblings. Since that time different chips have been used, resulting in larger segments when comparing since not all the same SNPs are tested and a missing SNP = a match
This was a trick, this is my brother's daughter's match to me
The problem with all these predictions is the many overlaps between relationships
These images are from my preferred calculator at DNA painter based on Bettinger's data collection as well as Millard's simulations which shows both observed and simulated ranges for each relationship
A match of 774?
A match of 228?
There are now relationship predictions from the Tier 1 one to many based on the cM
Click on the total cM and a box pops up
There are now relationship predictions from the Tier 1 one to many based on the cM
CentiMorgans (cM) alone can only accurately predict parent-child, a range of possibilities is likely for all other relationships.
You have to look at the relative ages, who else they match, how the matches match each other, and segment sizes
More about this tool at
https://blog.kittycooper.com/2020/07/tool-to-find-common-ancestors-at-gedmatch/
Some of the results from my kit
Warning, it you put multiple surnames in then all those surnames have to appear in the GEDcom for it to be listed
Clicking the letters CMP takes you to the compare GEDcoms tool with the numbers filled in
Comparing GEDcoms is a great feature at GEDmatch, you can read more about it here
https://blog.kittycooper.com/2015/04/using-the-gedcom-capabilites-at-gedmatch-com/
Example of a matching person in 2 different GEDcoms
Basic clustering hasn't changed at GEDmatch, see ... https://blog.kittycooper.com/2019/05/more-clustering-tools/
but the new tools include some new clustering!
Can software figure out the family tree from the shared DNA?
AUTO Kinship
Which fields to change in the autokinship form
The result has to be downloaded
After you download it and unzip it click on the folder Autokinship then on the HTML file autokinship to see a long page in your browser: first the clusters
My auto kinship clusters
one endogamous population grandparent, and another missing from the testing community
put your mouse on any box to see all the cluster members
clicking on any box takes you to the one to one comparison
After listing the settings used and the kits not in, next come a series of explanations, click a title to see the explanation
The next item is a list of results in a table with icons when something could be generated
Cluster 2 is my Munson grandad
lets look at the autokinship by clicking on that icon
which brings up a new html page
Since so many of my MUNSON cousins are tested ... what would autokinship came up with for that cluster 2 green box?
Lauritz + Josephine Monsen
Inga
Lawrence
Alfred
Christian
Pretty accurate. I have identified which child of my great great grandparents each match is descended from. Only the last one is not, he is actually descended from a sister of Josephine's
?
A closer look at my cousins with the one generational correction
?
This tool actually generates multiple kinship trees
Next is a matrix of how many cM they each share with each other
And finally there is a list of shared segments that met your criteria
Tim Janzen did a great Rootstech talk about these new features at
Shall we look at the auto tree for my endogamous cluster?
Here are the few trees created for cluster1 - the problem is not enough kits have linked trees on GEDmatch
Gugenheimer and Thannhauser are known ancestral lines, not Shadur
Can this
autokinship tool
help in unknown parentage cases?
MAYBE
A typical kinship tree
for a solved unknown father case
A closer look shows most of the numbers are too small to expect accuracy
A current unknown father case
A current unknown father case, close up
The answer is that for unknown parentage cases these kinship charts tell us whose trees to build, rather than being much of a shortcut
Until more people upload trees, the autotree tool is not that useful
The autotree tool does let you select a cM thresholds
But it uses the old GEDmatch clustering, which does appear on your page so no download is required
Note the tabs - click on the AutoTree AutoCluster Analysis
The autotree analysis
Click on the only tree it made
However doing some basic genealogy will discover that Anna and Carl are siblings
This auto tree was for my father's 2nd cousin, it finds the common ancestor for another cousin but does not go far enough back for my dad
So far I am very happy with the Verogen custodianship of GEDmatch
