Screening Olive Progenies for Resistance to Verticillium Dahliae

Trapero, Carlos; Muñoz-Díez, Concepción; Rallo, L.; López-Escudero, Francisco Javier; Barranco, D.

doi:10.17660/actahortic.2011.924.16

Cited by 13 publications

(27 citation statements)

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“…However some resistant seedlings were obtained from all parents (Wilhelm and Taylor, 1965). Similarly, Trapero et al (2011) found lower mean SAUDPC values in progenies from resistant cultivar 'Frantoio' (although not from 'Empeltre') than susceptible cultivars such as 'Picual', 'Arbequina', and 'Manzanilla de Sevilla'. Besides, resistant genotypes were selected from all progenies and no significant differences between cultivars were obtained for the percentages of plants of each progeny showing no symptoms.…”

Section: Discussionmentioning

confidence: 81%

“…However, evaluation of Verticillium wilt resistance has shown that most of the commercial cultivars are susceptible to D pathotype of the fungus, which is currently prevalent in most olive growing areas (Trapero et al, 2011). In Spain, extensive evaluations have been carried out in cultivars preserved at the World Olive Germplasm Bank of Córdoba (WOGBC; Belaj et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Resistance to Verticillium wilt in olive progenies from open-pollination

Arias‐Calderón

León

Bejarano-Alcázar

et al. 2015

Scientia Horticulturae

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Section: Discussionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Resistance to Verticillium wilt in olive progenies from open-pollination

Arias‐Calderón

León

Bejarano-Alcázar

et al. 2015

Scientia Horticulturae

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“…A two-step protocol for evaluating cultivars and seedling genotypes for resistance to verticillium wilt is currently on course in a controlled environment and in highly infested field plots (Trapero et al, 2011(Trapero et al, , 2013a. The first step is the screening of 40-day-old olive seedlings via root-dipping inoculation with a highly virulent V. dahliae isolate (V117) in a controlled environment.…”

Section: Agronomic Evaluation and Objectivesmentioning

confidence: 99%

Breeding Oil and Table Olives for Mechanical Harvesting in Spain

Rallo¹

2014

hortte

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The olive (Olea europaea) and table olive industries worldwide are almost entirely supported by low-density rain-fed orchards planted with local cultivars empirically selected by farmers for centuries. New early and high-bearing plantation systems adapted to mechanical harvesting have been designed and developed during the past 50 years. Only certain traditional cultivars are well suited for these new olive plantations. The new orchards therefore require new cultivars. A long-term effort on the exploration, conservation, and sustainable use of olive genetic resources starting in Spain in 1970 has been followed by breeding programs developed since the early 1990s by the University of Cordoba, the University of Seville, and the Andalusia Institute for Agricultural, Food and Fisheries Research. We are trying to use crossbreeding to obtain new early bearing cultivars adapted to mechanically harvested orchards. Objectives related to shortening the juvenile period (JP) and developing early tests of selection, early bearing, high cropping, resistance to chief diseases (particularly verticillium wilt caused by Verticillium dahliae), industrial suitability, high oil content, diversity of olive oil composition for oil cultivars, and fruit size and quality for table olive are being pursued. Specific criteria for the adaptation of oil olive and table olive cultivars to mechanical harvesting, such as low-vigor trees with a compact growth habit, the force needed for fruit removal, natural fruit abscission, resistance to bruising, and extending the harvest time in cultivars showing homogeneous ripening are evaluated in the progenies. To date, more than 19,000 seedlings have been initially evaluated, 481 preselections are on intermediate field trials, and 31 advanced selections are being established in a network of field trials. A new protected cultivar Sikitita (Chiquitita in the United States), selected for very-high-density narrow hedgerows, was released in 2008. Recently, a first project on olive genomics is heralding the use of marker-assisted selection in the midterm phase of development. Cultivars adapted to the new mechanical harvest systems will be progressively released in the future.

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“…Regarding our knowledge of the effect of mineral nutrition on VWO, in a first approach based on field observations in the Guadalquivir valley (Andalusia region, southern Spain), it has been observed that excess nitrogen (N) or imbalances of N-potassium (K) favour VWO epidemics in affected olive groves [6,7]. However, despite this evidence, studies on the effect of plant mineral nutrition on the occurrence and development of VWO are almost non-existent.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Effect of Nutritional Imbalances of N and K on the Infection of Verticillium dahliae in Olive

López-Moral

Agustí-Brisach

Ruiz-Blancas

et al. 2022

JoF

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The effect of mineral nutrition on wilt diseases has been previously reported in many herbaceous hosts, though such an effect on Verticillium wilt in olive (Olea europaea L.; VWO), caused by Verticillium dahliae, is still uncertain. Field observations reveal that nitrogen (N) excess or imbalances of N-potassium (K) favour VWO epidemics. However, this has yet to be demonstrated. Thus, the aim of this study was to evaluate the influences of nutritional imbalances of N and K in V. dahliae infection of olive. To this end, adjusted treatments with N excess (↑N+↑Na), K deficiency (↓K) and their combination (↑N+↑Na+↓K) were evaluated on the viability of V. dahliae microsclerotia (MS), as well as on disease development in olive plants. In parallel, the potential indirect effect of the treatments on the viability of conidia and MS of V. dahliae was evaluated through the stimuli of root exudates. Treatments ↑N+↑Na and ↑N+↑Na+↓K decreased MS germination and disease progress, whereas ↓K significantly increased both parameters. Root exudates from treated plants increased the conidia germination of V. dahliae but reduced the MS germination. The results of this study will be the basis for planning further research towards a better understanding of the effect of mineral nutrition on VWO.

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Screening Olive Progenies for Resistance to Verticillium Dahliae

Cited by 13 publications

References 0 publications

Resistance to Verticillium wilt in olive progenies from open-pollination

Resistance to Verticillium wilt in olive progenies from open-pollination

Breeding Oil and Table Olives for Mechanical Harvesting in Spain

Elucidating the Effect of Nutritional Imbalances of N and K on the Infection of Verticillium dahliae in Olive

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