Barbara Arredi
Catholic University of the Sacred Heart
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Publication
Featured researches published by Barbara Arredi.
American Journal of Human Genetics | 2004
Barbara Arredi; Estella S. Poloni; Silvia Paracchini; Tatiana Zerjal; Dahmani M. Fathallah; Mohamed Makrelouf; Vincenzo Lorenzo Pascali; Andrea Novelletto; Chris Tyler-Smith
We have typed 275 men from five populations in Algeria, Tunisia, and Egypt with a set of 119 binary markers and 15 microsatellites from the Y chromosome, and we have analyzed the results together with published data from Moroccan populations. North African Y-chromosomal diversity is geographically structured and fits the pattern expected under an isolation-by-distance model. Autocorrelation analyses reveal an east-west cline of genetic variation that extends into the Middle East and is compatible with a hypothesis of demic expansion. This expansion must have involved relatively small numbers of Y chromosomes to account for the reduction in gene diversity towards the West that accompanied the frequency increase of Y haplogroup E3b2, but gene flow must have been maintained to explain the observed pattern of isolation-by-distance. Since the estimates of the times to the most recent common ancestor (TMRCAs) of the most common haplogroups are quite recent, we suggest that the North African pattern of Y-chromosomal variation is largely of Neolithic origin. Thus, we propose that the Neolithic transition in this part of the world was accompanied by demic diffusion of Afro-Asiatic-speaking pastoralists from the Middle East.
Archive | 2006
Barbara Arredi; Estella S. Poloni; Chris Tyler-Smith
SUMMARY Although hominins were present in Europe as early as ~780 thousand years ago, there is broad agreement that these archaic humans, including Neanderthals, contributed little to the contemporary European gene pool. In contrast, there is vigorous debate about the relative contributions of humans who entered in the Upper Paleolithic and Neolithic. Here, we argue that the Y-chromosomal diversity pattern is likely to have a largely Neolithic or later origin. In addition to the genome-wide influences resulting from migration, admixture and drift, the effects of positive selection are detectable around some genes, such as lactase. Studies of species associated with humans, e.g. cattle, are providing additional insights.
International Congress Series | 2004
Cristian Capelli; Barbara Arredi; L Baldassarri; Ilaria Boschi; Francesca Brisighelli; Alessandra Caglià; Marina Dobosz; Francesca Scarnicci; V. L. Pascali
We investigated Y chromosome populations structure in the Italian peninsula by means of a number of microsatellites and SNPs markers. Genetic analysis revealed a certain degree of heterogeneity between samples at both haplotype (hpt) and haplogroup (hg) level. Implications in genetic history and forensic are discussed. D 2003 Published by Elsevier B.V.
Nucleic Acids Research | 2002
Silvia Paracchini; Barbara Arredi; Rod Chalk; Chris Tyler-Smith
Molecular Phylogenetics and Evolution | 2007
Cristian Capelli; Francesca Brisighelli; Francesca Scarnicci; Barbara Arredi; Alessandra Caglià; Giuseppe Vetrugno; Sergio Tofanelli; Valerio Onofri; Adriano Tagliabracci; Giorgio Paoli; Vincenzo Lorenzo Pascali
American Journal of Human Biology | 2004
Valentina Coia; Alessandra Caglià; Barbara Arredi; Francesco Donati; Fabrício R. Santos; Arpita Pandya; Luca Taglioli; Giorgio Paoli; Vincenzo Lorenzo Pascali; Giovanni Destro-Bisol; Chris Tyler-Smith
Forensic Science International | 2006
Cristian Capelli; Barbara Arredi; Laura Baldassari; Ilaria Boschi; Francesca Brisighelli; Alessandra Caglià; Marina Dobosz; Francesca Scarnicci; Giuseppe Vetrugno; Vincenzo Lorenzo Pascali
Archive | 2009
Barbara Arredi; Estella S. Poloni
Archive | 2006
Cristian Capelli; Barbara Arredi; Laura Baldassari; Ilaria Boschi; Francesca Brisighelli; Marina Dobosz; Francesca Scarnicci; Giuseppe Vetrugno; Vincenzo Lorenzo Pascali
International Congress Series | 2006
Francesca Brisighelli; Cristian Capelli; Vanesa Álvarez-Iglesias; Barbara Arredi; Laura Baldassarri; Ilaria Boschi; Marina Dobosz; Francesca Scarnicci; Antonio Salas; Angel Carracedo; Vincenzo Lorenzo Pascali