In case you don't know, Dienekes Pontikos has been posting a lot of analyses of availablepopulation geneticdata sets with the ADMIXTURE program. You can find his myriad posts under the ADMIXTURE-experiments tag. Below is a bar plot he generated today. To follow up a debate which occurred last spring, it does seem from several of his results that there is some evidence of Berber admixture among the Sephardic Jews.
