Journal of Plant Pathology (2007) 89, p. S27 (Acciarri et al.)

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N. Acciarri, G.L. Rotino, E. Sabatini, S. Voltattorni, D. Valentino and G. Tamietti (2007)
Identification of resistance traits to Fusarium and Verticillium wilt in Italian tomato landraces
Journal of Plant Pathology 89 (3, Suppl.), S27-S27
Poster Presentation at S.I.Pa.V XIV National Meeting - Perugia, Italy 19-21 Sept. 2007
Abstract: A representative number of tomato landraces belonging to different typologies, collected in the main Italian tomato-growing areas were evaluated for resistance to Fusarium oxysporum f. sp. lycopersici and Verticillium dahliae by root dip inoculation method. None of the screened landraces was completely resistant to Fusarium wilt. Nevertheless high levels of tolerance were found in 'Ovalino', 'Locale Valle d'Agri', 'Patataro pop. 29' (a typical accession from Campania), 'Sorrentino' (a pink tomato selected in the Sorrento area) and 'Mezzo lungo', and intermediate tolerance in additional 11 landraces. Similarly, most of the genotypes were highly susceptible to V. dahliae, but 'Eraldo 4', belonging to Cuore di Bue di Albenga type, 'Rosa di Rotonda' and 'Locale Valle d'Agri' (an accessions with pink fruit from Basilicata) and the breeding line 'L 16-94', appeared to be tolerant, showing disease incidence ranging from 72.2 to 100% and disease severity from 26.6 to 30%, whereas 'Sorrentino' was as resistant as 'Florida'. Two new molecular markers linked to Verticillium resistance genes were developed on the sequence information in GenBank for Ve genes and validated on several resistant varieties. Genetic analysis carried out using these markers demonstrated that the same resistant alleles are present both in 'Sorrentino' and 'Eraldo 4'. Two years of individual selection and self-fertilization yielded breeding lines of 'Sorrentino' resistant to V. dahliae and highly tolerant to F. oxysporum. 'Eraldo 4' is currently used as parent for the production of resistant and typical HF1 hybrids of the 'Cuor di Bue di Albenga' which is one of the Italian most popular typology for fresh consumption.
Database assignments for author(s): Giacomo Tamietti

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Verticillium dahliae Tomato (Solanum lycopersicum) Italy
Fusarium languescens Tomato (Solanum lycopersicum) Italy
Fusarium oxysporum