The microgeography of Y-chromosome variation in the Bergamo district. (Abstract/Poster in atti di convegno)

Type
Label
  • The microgeography of Y-chromosome variation in the Bergamo district. (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Magri C., Benuzzi G., Achilli A., Al-Zahery N., Lisa A., Torroni A., Zei G., Semino O., Santachiara-Benerecetti A.S., Cavalli-Sforza L.L. (2003)
    The microgeography of Y-chromosome variation in the Bergamo district.
    in FISV - Federazione Italiana Scienze della Vita, Rimini
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Magri C., Benuzzi G., Achilli A., Al-Zahery N., Lisa A., Torroni A., Zei G., Semino O., Santachiara-Benerecetti A.S., Cavalli-Sforza L.L. (literal)
Pagina inizio
  • 224 (literal)
Note
  • Poster (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) Dipartimento di Genetica e Microbiologia \"A. Buzzati-Traverso\", Universita di Pavia; 2) Istituto di Genetica Molecolare CNR, Pavia; 3) Department of Genetics, Stanford University, CA, USA. (literal)
Titolo
  • The microgeography of Y-chromosome variation in the Bergamo district. (literal)
Abstract
  • Previous studies on classical genetic markers have revealed a heterogeneous genetic background in the Italian population (Zei et al., 1993; Piazza et al,, 1988). In order to investigate genetic variation at a microgeographical scale within Italy, we have started a pilot study in the Bergamo district. A sample of 164 males (78 from the valleys and 86 from the plain) carrying monophyletic surnames, was analysed for the biallelic markers defining the main haplogroups of the Y chromosome phylogeny, which are powerful in revealing genetic stratifications. All samples fell into11 haplogroups (Hgs): E, G, I*, I-M223, J-M172, L, K(xM20, xM175, xM74), P(xM173), R1-M17, Rl-P25, R1-M269. All of them were observed in the Bergamo plain whereas only seven haplogroups were found in the Bergamo valleys. On the whole, haplogroups E, J, and G, which are frequent in Africa and the Middle East, were scarcely represented in the Bergamo samples (9.1%, 3.7% and 3.0%, respectively. As for the two typically European haplogroups Hg-Rl and Hg-I, they contributed differently to the Bergamo gene pool: while Hg-Rl is the most represented haplogroup (74,4%), Hg-I accounts only for 4.3% of the sample. The PC analysis on the available Italian groups clusters Bergamo with the other Northern Italian populations due to the higher frequency of Hg-Rl-M269 and the lower frequency of the Hg-E and Hg-J in North Italy compared to the South. In the European contest, the low frequencies of Hg-Rl-M3 7 and Hg-I place Bergamo among to the North Western European populations. Our analysis suggests that, in a region peopled since Palaeolithic times, the major contribution to the modem gene pool derives from the first inhabitants, and more recent migrations may have affected mainly the plain. This is consistent with the hypothesis of continuity between Middle and Late Upper Palaeolithic populations in North Italy. (literal)
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