Giuseppe Vona

TL;DR: There has been substantial back-migration into the Near East, there was a founder effect or bottleneck associated with the Last Glacial Maximum, 20,000 years ago, and a way to account for multiple dispersals of common sequence types is suggested.

TL;DR: The present study shows that earlier work based on fewer Y-chromosome markers led to rather simple historical interpretations and highlights the fact that many population-genetic analyses are not robust to a poorly resolved phylogeny and reveals signatures of several distinct processes of migrations and/or recurrent gene flow that occurred in Africa and western Eurasia over the past 25000 years.

TL;DR: The geographic and quantitative analyses of haplogroup and microsatellite diversity is strongly suggestive of a northeastern African origin of E-M78, with a corridor for bidirectional migrations between northeastern and eastern Africa and trans-Mediterranean migrations directly from northern Africa to Europe.

TL;DR: The microgeographic structure of Sardinia, well documented from a historical and linguistic point of view, and further supported by archaeological evidence, can be dissected at the genetic level: gene frequencies show heterogeneities which are statistically significant.

TL;DR: Analysis of frequency patterns and diversity in the largest collection of R-M269-related chromosomes yet assembled reveals no geographical trends in diversity, in contradiction to expectation under the Neolithic hypothesis, and suggests an alternative explanation for the apparent cline in diversity recently described.