http://www.cnr.it/ontology/cnr/individuo/prodotto/ID257755
Spatial genetic structure of Persian walnut (Juglans regia L.) populations across its native range (Abstract/Poster in atti di convegno)
- Type
- Label
- Spatial genetic structure of Persian walnut (Juglans regia L.) populations across its native range (Abstract/Poster in atti di convegno) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Alternative label
Pollegioni P.1, Olimpieri I.1, Chiocchini F.1, Woeste K.2, Clark J.3, Hemery G. E.4, Mapelli S.5,
Tortolano V.1, Mazzuccato A.6, Mavolti M. E.1 (2012)
Spatial genetic structure of Persian walnut (Juglans regia L.) populations across its native range
in Mediterranean Forest DNA Bank: The role of biobanks for research and protection of forest biodiversity, University of Tuscia, Viterbo (Italy),, 19-20-21 of April 2012
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Pollegioni P.1, Olimpieri I.1, Chiocchini F.1, Woeste K.2, Clark J.3, Hemery G. E.4, Mapelli S.5,
Tortolano V.1, Mazzuccato A.6, Mavolti M. E.1 (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.medna-bank.eu/index.php/events/36-confviterbo (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
- First International Conference The role of biobanks for research and protection of forest biodiversity (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1 C.N.R. Institute of Agro-environmental and Forest Biology, viale Marconi 2, 05010, Porano, Terni, Italy.
2 U.S.D.A. Forest Service, Hardwood Tree Improvement and Regeneration Center, Department of Forestry and
Natural Resources, Purdue University, 715 West State Street, West Lafayette IN 47907-2061, USA.
3 Earth Trust, Little Wittenham, Abingdon, Oxfordshire, OX14 4QZ, England.
4 Sylva Foundation, Little Wittenham, Oxfordshire, OX14 4RA, England.
5 C.N.R. Institute of Agricultural Biology and Biotechnology, via Bassini 15, 20133, Milano, Italy.
6 Dipartimento di Agrobiologia e Agrochimica, Sezione Genetica, Universita` degli Studi della Tuscia, Via S.C. de
Lellis, 01100 Viterbo, Italy (literal)
- Titolo
- Spatial genetic structure of Persian walnut (Juglans regia L.) populations across its native range (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autoriVolume
- Marco Cosimo Simeone University of Tuscia, Italy
Bartolomeo Schirone University of Tuscia, Italy (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
- Marco Cosimo Simeone University of Tuscia, Italy, Bartolomeo Schirone University of Tuscia, Italy (literal)
- Abstract
- Persian walnut is highly economically important species cultivated throughout the temperate regions of
the world for its high quality wood and edible nuts. Anthropized species often suffered genetic erosion.
Nevertheless, an extensive and accurate evaluation of worldwide genetic resources of walnut has not been
carried out. Establishing the center(s) of diversity for the species, understanding its post glacial expansion
events and shedding light to its history of domestication and dispersal by humans, which began about 2000
yr. ago in Eurasia, can predict how walnut species will respond to possible future climate change scenarios.
In the framework of WALNET agreement, we will provide valuable information on how landscape features
influenced gene flow and promoted walnut local adaptation. The general objective is to apply landscape
genetic analysis with support of GIS technologies and spatial statistic tools to identify and quantify the
effects of refugia during Last Glacial Maximum, post-glacial expansion, physical and climatic barriers,
human domestication events, anthropological factors and connectivity between rural human communities
on genetic differentiation of walnut populations in Eurasia. In this study, we determined the spatial genetic
structure of 29 J. regia populations (number of adult trees = 703) collected in the native range of the
species (China, Uzbekistan, Kyrgyzstan, Tajikistan, Pakistan, Iran and Georgia) using 14 neutral nuclear SSR
markers. The level of allelic richness was relatively high within each population and the AMOVA revealed
that 84.67% of molecular variance was partitioned within individuals, while the 15.33% was distributed
among populations. Evidence for human-mediated domestication bottleneck events was detected in only
10.3% of populations. A Bayesian approach, divided 703 walnut samples into three clusters: (1) Kyrgyzstan
genotypes, (2) Chinese genotypes and (3) trees from South-Western Asia. The combination of geostatistical
analysis (ArcGIS 9.3 software) such as Kriging interpolation of Q-membership (clustering surface maps) and
Monmonier's maximum difference algorithm analysis allowed to detect spatial coincidence of landscape
features with genetic discontinuities (overlay approach). Our data confirmed the presence of multiple
glacial refugia hypothesis in the native range of J. regia and the presence of secondary contact zone
(hybridization) between populations originating from two glacial refugia in Uzbekistan. (literal)
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