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Genetic structure of wild and cultivated olives in the eentral Mediterranean basin

Baldoni, Luciana and Tosti, Nicola and Ricciolini, Claudia and Belaj, Angjelina and Arcioni, Sergio and Pannelli, Giorgio and Gemana, Maria Antonietta and Mulas, Maurizio and Porceddu, Andrea (2006) Genetic structure of wild and cultivated olives in the eentral Mediterranean basin. Annals of Botany, Vol. 98 (5), p. 935-942. eISSN 1095-8290. Article.

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DOI: 10.1093/aob/mcl178

Abstract

Background and Aims Olive cultivars and their wild relatives (oleasters) represent two botanical varieties of Olea Europaea subsp. europaea (respectively europaea and sylvestris). Olive cultivars have undergone human selection and their area of diffusion overlaps that of oleasters. Populations of genuine wild olives seem restricted to isolated areas of Mediterranean forests, while most other wild-looking forms of olive may include feral forms that escaped cultivation.
Methods The genetic structure of wild and cultivated olive tree populations was evaluated by amplified fragment length polymorphism (AFLP) markers at a microscale level in one continental and two insular Italian regions.
Key Results The observed patterns of genetic variation were able to distinguish wild from cultivated populations and continental from insular regions. Island oleasters were highly similar to each other and were clearly distinguishable from those of continental regions. Ancient cultivated material from one island clustered with the wild plants, while the old plants from the continental region clustered with the cultivated group.
Conclusions On the basis of these results, we can assume that olive trees have undergone a different selection/ domestication process in the insular and mainland regions. The degree of differentiation between oleasters and cultivated trees on the islands suggests that all cultivars have been introduced into these regions from the outside, while the Umbrian cultivars have originated either by selection from local oleasters or by direct introduction from other regions.

Item Type:Article
ID Code:4130
Status:Published
Refereed:Yes
Uncontrolled Keywords:Olea europaea, AFLP, genetic diversity, population structure, wild populations
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/03 Arboricoltura generale e coltivazioni arboree
Area 07 - Scienze agrarie e veterinarie > AGR/07 Genetica agraria
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze agronomiche e genetica vegetale agraria
001 Università di Sassari > 01 Dipartimenti > Economia e sistemi arborei
Publisher:Oxford University Press
eISSN:1095-8290
Copyright Holders:© The Author 2006.
Deposited On:09 Jul 2010 11:09

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