{"id":679,"date":"2018-04-10T17:43:36","date_gmt":"2018-04-10T15:43:36","guid":{"rendered":"https:\/\/hoijen.se\/?p=679"},"modified":"2023-10-13T17:11:26","modified_gmt":"2023-10-13T15:11:26","slug":"alla-slakt-med-alla","status":"publish","type":"post","link":"https:\/\/turid.se\/en\/2018\/04\/10\/alla-slakt-med-alla\/","title":{"rendered":"Everyone related to everyone?"},"content":{"rendered":"

Sometimes you can get the feeling that everyone in a limited area gets a DNA match with everyone else. This can cause problems when you want to test whether a relationship is correct; it becomes difficult to distinguish interesting matches from uninteresting ones. It becomes difficult to know what you are actually seeing.<\/strong><\/p>\n

I am currently trying to confirm or dismiss a kinship from the Byske area and to get a better basis for assessment I wanted to estimate the presence of "random matches" or "false matches". How big a risk is it really that a person with roots in the area between Skellefte\u00e5 and Pite\u00e5 will be matched with any other person without there being any particular suspicion of kinship?<\/p>\n

Completely unscientifically, I therefore asked in Facebook groups for Gedmatch numbers to people with main roots in the area. I received a set that I now compared on Gedmatch.<\/p>\n

This is how pairwise total shared autosomal DNA and X-DNA look like in the group of 10 people from the area on Gedmatch. First with threshold 7 cM \/ 700 SNP:<\/p>\n

\"\"
Auth. DNA, Total Shared cM, 7 cM \/ 700 SNPs<\/figcaption><\/figure>\n
\"\"
X-DNA, Total Shared cM, 7 cM \/ 700 SNPs<\/figcaption><\/figure>\n

Then with a slightly lower threshold, 5 cM \/ 500 SNPs:<\/p>\n

\"\"
Auth. DNA, Total Shared cM, 5 cM \/ 500 SNPs<\/figcaption><\/figure>\n
\"\"
X-DNA, Total Shared cM, 5 cM \/ 500 SNPs<\/figcaption><\/figure>\n

Conclusion<\/h3>\n

Most people with roots in the Skellefte\u00e5 - Pite\u00e5 area have a clear autosomal DNA connection to each other. 67 % (2 of 3) in my random group have linkage that passes the 7 cM threshold and 82 % (5 of 6) pass the 5 cM threshold.<\/p>\n

X-match is not as common but approximately 15 % (1 linkage in 6) have X-DNA that passes the 7 cM threshold and 35 % (1 linkage in 3) have X-DNA that passes the 5 cM threshold.<\/p>\n

The composition of the group can be debated, but the tendency is clear. The majority match each other on the autosomal test and quite a few have X-match.<\/p>\n

Jakob Norstedt<\/em><\/p>","protected":false},"excerpt":{"rendered":"

Sometimes you can get the feeling that everyone in a limited area gets a DNA match with everyone else. This can cause problems when you want to test whether a relationship is correct; it becomes difficult to distinguish interesting matches from uninteresting ones. It becomes difficult to know what you are actually seeing. I am currently trying to confirm or\u2026 Continue reading Everyone related to everyone?<\/span><\/a><\/p>","protected":false},"author":3,"featured_media":1749,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[55],"tags":[60],"class_list":["post-679","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hoijen","tag-dna-teknik","entry"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png","jetpack_sharing_enabled":true,"rttpg_featured_image_url":{"full":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false],"landscape":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false],"portraits":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false],"thumbnail":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett-150x150.png",150,150,true],"medium":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett-300x201.png",300,201,true],"large":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false],"1536x1536":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false],"2048x2048":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false],"trp-custom-language-flag":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett-18x12.png",18,12,true],"post-thumbnail":["https:\/\/turid.se\/wp-content\/uploads\/2018\/04\/ske-pite-vinjett.png",335,225,false]},"rttpg_author":{"display_name":"Jakob Norstedt","author_link":"https:\/\/turid.se\/en\/author\/jakob\/"},"rttpg_comment":0,"rttpg_category":"H\u00f6ijen<\/a>","rttpg_excerpt":"Ibland kan man f\u00e5 en k\u00e4nsla av att alla i ett begr\u00e4nsat omr\u00e5de f\u00e5r DNA-match med alla andra. Detta kan st\u00e4lla till problem n\u00e4r man vill\u00a0 testa om ett sl\u00e4ktskap st\u00e4mmer; det blir sv\u00e5rt att skilja intressanta matcher fr\u00e5n ointressanta. Det blir sv\u00e5rt att veta vad man egentligen ser. Jag f\u00f6rs\u00f6ker just nu bekr\u00e4fta eller……","_links":{"self":[{"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/posts\/679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/comments?post=679"}],"version-history":[{"count":1,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/posts\/679\/revisions"}],"predecessor-version":[{"id":1810,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/posts\/679\/revisions\/1810"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/media\/1749"}],"wp:attachment":[{"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/media?parent=679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/categories?post=679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/turid.se\/en\/wp-json\/wp\/v2\/tags?post=679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}