http://www.cnr.it/ontology/cnr/individuo/prodotto/ID10832
Long term human impacts on genetic structure of Italian walnut inferred by SSR markers. (Articolo in rivista)
- Type
- Label
- Long term human impacts on genetic structure of Italian walnut inferred by SSR markers. (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1007/s11295-011-0368-4 (literal)
- Alternative label
Pollegioni P., Woeste K., Olimpieri I., Marandola D., Cannata F., Malvolti M.E (2011)
Long term human impacts on genetic structure of Italian walnut inferred by SSR markers.
in Tree genetics & genomes (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Pollegioni P., Woeste K., Olimpieri I., Marandola D., Cannata F., Malvolti M.E (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Titolo
- Long term human impacts on genetic structure of Italian walnut inferred by SSR markers. (literal)
- Abstract
- Abstract Life history traits, historic factors, and human
activities can all shape the genetic diversity of a species. In
Italy, walnut (Juglans regia L.) has a long history of
cultivation both for wood and edible nuts. To better
understand the genetic variability of current Italian walnut
resources, we analyzed the relationships among the genetic
structure of local walnut populations (inferred by SSR
markers) and human migrations along ancient routes, using
the territory of Royal Tratturo Candela-Pescasseroli (RT) as
a case study. Sixteen J. regia provenances were collected
along RT and compared with 13 Italian provenances and the
landrace Sorrento. Although the level of SSR polymorphism
we observed was moderately high, AMOVA revealed that
most of the diversity was located within individuals
(92.58%), and geographical differentiation was low (Dest=
0.076). Evidence for human-mediated domestication bottleneck
events was detected in about 95% of walnut provenances.
A Bayesian approach divided 456 walnut samples
into three clusters: (1) Sorrento genotypes, (2) trees from the
island of Sicily, and (3) the remaining germplasm. The
UPGMA tree based on Nei's distances distinguished northeastern
provenances and weakly grouped 12 of 16 provenances
of RT. The observed genetic differences derived
mainly from gradations in allele frequencies. Separation of
the Sicilian provenance from the mainland may be explained
in terms of founder effects and prolonged geographic
isolation. Two contrasting forces, selection, and frequent
inter-regional transfer of propagules, appear to drive the
patterns of genetic variability for J. regia. (literal)
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