Family Tree DNA: Genetic Testing Service Get genetically tested to discover your relationship to other families, other Jews, and other ethnic groups. Abstract: "The Ashkenazi Jewish (AJ) population has long been viewed as a genetic isolate, yet it is still unclear how population bottlenecks, admixture, or positive selection contribute to its genetic structure.
Projects you might qualify to join include "Gesher Galicia - Jewish DNA Project", "Jewish Gen Belarus SIG DNA Project", "Jewish Gen Hungarian SIG DNA Project", "German Jewish Gersig DNA Project", "Jewish Frankfurt", "Sephardic Heritage DNA Project", "Jews of Rhodes Project", "The Jewish R1b Project", "Ashkenazi Levite R1a1", and "Jewish E Project". Here we analyzed a large AJ cohort and found higher linkage disequilibrium (LD) and identity-by-descent relative to Europeans, as expected for an isolate.
Two major groups were identified by principal component, phylogenetic, and identity by descent (IBD) analysis: Middle Eastern Jews and European/Syrian Jews.
"Signatures of founder effects, admixture, and selection in the Ashkenazi Jewish population." Proceedings of the National Academy of Sciences of the United States of America (PNAS) 1 (September 14, 2010): pages 16222-16227. Among the comparative populations were 1705 continental Europeans and 1251 European-Americans.
Recent reports have reaffirmed that the AJ population has a common Middle Eastern origin with other Jewish Diaspora populations, but also suggest that the AJ population, compared with other Jews, has had the most European admixture.
Thus, this study demonstrates that European/Syrian and Middle Eastern Jews represent a series of geographical isolates or clusters woven together by shared IBD genetic threads." "The genetic, cultural and religious traditions of contemporary Jewish people originated in the Middle East over three thousand years ago.
Since that time, Jewish communities have migrated from the Middle East into Europe, North Africa and across the world. This study shows that although Jewish people experienced genetic mixing with surrounding populations, they retained a genetic coherence along with a religious one.