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Apulian Autochthonous Olive Germplasm: A Promising Resource to Restore Cultivation in Xylella fastidiosa -Infected Areas

Michele Antonio Savoia, Valentina Fanelli, Monica Marilena Miazzi (monicamarilena.miazzi@uniba.it), Francesca Taranto, Silvia Procino, Leonardo Susca, Vito Montilon, Oriana Potere, Franco Nigro and Cinzia Montemurro
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Michele Antonio Savoia: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Valentina Fanelli: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Monica Marilena Miazzi: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Francesca Taranto: Institute of Biosciences and Bioresources (CNR-IBBR), 70126 Bari, Italy
Silvia Procino: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Leonardo Susca: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Vito Montilon: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Oriana Potere: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Franco Nigro: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy
Cinzia Montemurro: Department of Soil: Plant and Food Sciences (DiSSPA), University of Bari Aldo Moro, 70126 Bari, Italy

Agriculture, 2023, vol. 13, issue 9, 1-19

Abstract: The olive tree ( Olea europaea subsp. europaea var. europaea ) represents the cornerstone crop of Apulian agriculture, which is based on the production of oil and table olives. The high genetic variability of the Apulian olive germplasm is at risk of genetic erosion due to social, economic, and climatic changes. Furthermore, since 2013, the spread of the Gram-negative bacterium Xylella fastidiosa subsp. pauca responsible for the olive quick decline syndrome (OQDS) has been threatening olive biodiversity in Apulia, damaging the regional economy and landscape heritage. The aim of this study was to investigate the differential response to X. fastidiosa infection in a collection of 100 autochthonous Apulian olive genotypes, including minor varieties, F1 genotypes, and reference cultivars. They were genotyped using 10 SSR markers and grown for 5 years in an experimental field; then, they were inoculated with the bacterium. Symptom assessments and the quantification of bacterium using a qPCR assay and colony forming units (CFUs) were carried out three and five years after inoculation. The study allowed the identification of nine putatively resistant genotypes that represent a first panel of olive germplasm resources that are useful both for studying the mechanisms of response to the pathogen and as a reserve for replanting in infected areas.

Keywords: Apulian germplasm; genetic diversity; olive breeding; symptomatology (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (1)

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