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Plants
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Olive Breeding
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Olive Breeding

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Genetics, Genomics and Biotechnology".

Deadline for manuscript submissions: closed (15 March 2022) | Viewed by 12332

Special Issue Editors

Prof. Dr. Luis Rallo

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Guest Editor
Department of Agronomy, Campus of Rabanales, University of Cordoba, Cordoba, Spain
Interests: olive; genetic resources; crossbreeding; reproductive physiology; highdensity plantations
Prof. Dr. Fernando Pliego Alfaro

E-Mail Website
Guest Editor
Department of plant biology, University of Malaga, Málaga, Spain
Interests: olive in vitro culture; micropropagation; regeneration via somatic embryogenesis; genetic transformation; somaclonal; variation
Prof. Dr. Pilar Rallo

E-Mail Website
Guest Editor
Department of Agroforestry Sciences, University of Seville, Sevilla, Spain
Interests: table olive; crossbreeding; fruit quality; fruit bruising and damage; plant architecture
Prof. Dr. Concepción Muñoz Díez

E-Mail Website
Guest Editor
Department of Agronomy, University of Cordoba, Cordoba, Spain
Interests: genetic diversity; population genetics; developmental genetics; molecular evolution; crossbreeding
Prof. Dr. Carlos Trapero

E-Mail Website
Guest Editor
Department of Agronomy, University of Cordoba, Cordoba, Spain
Interests: olive breeding; plant resistance; Verticillium wilt; field phenotyping; rootstocks

Special Issue Information

Dear Colleagues,

Olive growing is expanding throughout the world as a major source of healthy oil and fruits. However, current and future plantations face important challenges due to labor, climatic, and biotic constraints, among others, which could jeopardize olive growing soon. Most olive cultivars currently used are very old and were locally selected beginning some millennia ago.

Developing new olive cultivars is key to adapting new plantations to current needs and at the same time maximizing yield under the presence of biotic and abiotic stresses. Olive breeding has come to an exciting new era, where combining conventional plant breeding methodologies with new, next-generation sequencing technologies will change the way and pace that new olive varieties are being bred. Using and conserving the vast olive genetic resources, including wild genotypes and related species, is also very important for the success of olive breeding.

Plenty of studies still need to be undertaken to know the genes and mechanisms involved in the main desired traits (resistance, oil production etc.) to develop better-performing cultivars more accurately and at a faster speed. This Special Issue of Plants will focus on the overview, methodology, success cases, and prospects of olive breeding.

Prof. Dr. Luis Rallo
Prof. Dr. Fernando Pliego Alfaro
Prof. Dr. Pilar Rallo
Prof. Dr. Concepción Muñoz Díez
Prof. Dr. Carlos Trapero
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Olea europaea
  • olive breeding
  • olive cultivars
  • olive genetic resources

Published Papers (3 papers)

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Research

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18 pages, 2035 KiB  
Article
Elucidation of the Origin of the Monumental Olive Tree of Vouves in Crete, Greece
by Aureliano Bombarely, Andreas G. Doulis, Katerina K. Lambrou, Christos Zioutis, Evi Margaritis and Georgios Koubouris
Plants 2021, 10(11), 2374; https://doi.org/10.3390/plants10112374 - 04 Nov 2021
Cited by 6 | Viewed by 4534
Abstract
The olive tree of Vouves in Crete, is considered the oldest producing olive tree in the world with an estimated age exceeding 4000 years. In the present study, we sequenced two samples (from the bottom and the top of the tree) to elucidate [...] Read more.
The olive tree of Vouves in Crete, is considered the oldest producing olive tree in the world with an estimated age exceeding 4000 years. In the present study, we sequenced two samples (from the bottom and the top of the tree) to elucidate the genetic relation of this ancient tree with other olive cvs as well as to gain some insights about its origin. Our results showed that both samples have different genetic origins, proving that this ancient tree has been grafted at least one time. On the basis of whole genome sequences the sample from the top of the Vouves tree showed relation of the same order than half-siblings to one accession corresponding to the present-day Greek cv ‘Mastoidis’. Nevertheless, in the framework of a microsatellite analysis it was found to cluster with the ‘Mastoidis’ samples. The Vouves rootstock (bottom sample) showed a clear grouping with the oleaster samples in a similar way to that of ‘Megaritiki’ Greek cv although it does not show any signal of introgression from them. The genomic analyses did not show a strong relation of this sample with the present-day Greek cvs analyzed in this study so it cannot be proved that it has been used as a source for cultivated olive tree populations represented by available genome sequences. Nevertheless, on the basis of microsatellite analyses, the Vouves rootstock showed affinity with two present-day Greek cvs, one “ancient” rootstock from continental Greece as well as monumental trees from Cyprus. The analysis of the impact of the variants in the gene space revealed an enrichment of genes associated to pathways related with carbohydrate and amino acid metabolism. This is in agreement with what has been found before in the sweep regions related with the process of domestication. The absence of oleaster gene flow, its old age and its variant profile, similar to other cultivated populations, makes it an excellent reference point for domestication studies. Full article
(This article belongs to the Special Issue Olive Breeding)
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19 pages, 3250 KiB  
Article
Functional Traits of Olive Varieties and Their Relationship with the Tolerance Level towards Verticillium Wilt
by Martina Cardoni, Jesús Mercado-Blanco and Rafael Villar
Plants 2021, 10(6), 1079; https://doi.org/10.3390/plants10061079 - 27 May 2021
Cited by 9 | Viewed by 2750
Abstract
Verticillium wilt of olive (VWO), caused by the soil-borne pathogen Verticillium dahliae, is considered one of the most important diseases affecting this tree crop. One of the best VWO management measures is the use of tolerant cultivars. Remarkably, no information is available about [...] Read more.
Verticillium wilt of olive (VWO), caused by the soil-borne pathogen Verticillium dahliae, is considered one of the most important diseases affecting this tree crop. One of the best VWO management measures is the use of tolerant cultivars. Remarkably, no information is available about olive functional traits and their potential relationship with tolerance to V. dahliae. Twenty-five selected functional traits (for leaf, stem, root and whole plant) were evaluated in six olive varieties differing in their VWO tolerance level to identify possible links between this phenotype and functional traits’ variation. High intervarietal diversity was found among cultivars and several functional traits were related with VWO tolerance. Tolerant varieties showed higher leaf area, dry matter content (leaf, stem and plant) and mass fraction for stems, but lower for leaves. Significant differences were also detected for root functional traits, tolerant cultivars displaying larger fine root diameter and lignin content but smaller specific length and area of thick and fine roots. Correlations were found among functional traits both within varieties and between levels of tolerance/susceptibility to VWO. Associations were observed between biomass allocation, dry matter content and VWO tolerance. The most relevant difference between tolerant and susceptible cultivars was related to root system architecture. Full article
(This article belongs to the Special Issue Olive Breeding)
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Review

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12 pages, 41568 KiB  
Review
The Status of Genetic Resources and Olive Breeding in Tunisia
by Olfa Saddoud Debbabi, Fathi Ben Amar, Sameh Mnasri Rahmani, Francesca Taranto, Cinzia Montemurro and Monica Marilena Miazzi
Plants 2022, 11(13), 1759; https://doi.org/10.3390/plants11131759 - 01 Jul 2022
Cited by 6 | Viewed by 3643
Abstract
The olive tree, an iconic symbol of the Mediterranean basin, is the object of growing international interest in the production of olive oil for the world food market. In Tunisia, which is the fourth-largest producer of olive oil in the world, the production [...] Read more.
The olive tree, an iconic symbol of the Mediterranean basin, is the object of growing international interest in the production of olive oil for the world food market. In Tunisia, which is the fourth-largest producer of olive oil in the world, the production of olives and olive oil is of great socio-economic importance. Cultivation is widespread from north to south, but it is carried out using traditional techniques that results in extremely irregular production levels. To maintain their competitiveness on the international market, Tunisian producers must improve the quality of the oil through breeding plans that enhance the rich genetic heritage that is still not adequately exploited. The objective of this review is to present the state of olive breeding in Tunisia, illustrating the opportunities available for a better use of the rich Tunisian genetic heritage, the challenges it must face, and the need to multiply the efforts for sustainability, even in the light of the challenges posed by climate changes. Full article
(This article belongs to the Special Issue Olive Breeding)
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