Articles
Evaluation of phenotypic behavior of tomato cultivars to Meloidogyne incognita
Article number
1437_24
Pages
191 – 198
Language
English
Abstract
Environmental conditions in crops under protected cultivation act in favor of the establishment and development of polyphagous nematodes such as Meloidogyne spp.
Among the management tools, genetic resistance stands out as one of the pillars of integrated pest management.
In tomato (Solanum lycopersicum), resistance to Meloidogyne spp. is generally provided by the Mi gene.
The objective of this work was to evaluate the phenotypic performance of three tomato plant materials against M. incognita. For this purpose, two pots experiments were carried out in a cold greenhouse.
Two resistant commercial hybrids ‘Trafalgar’ and ‘Virgilio’, and the susceptible open-pollinated cultivar ‘Platense italiano’ were evaluated in two trials.
Each pot was inoculated with 2000 eggs/J2 of M. incognita. Within each plant material uninoculated pots were used as controls.
The thermal sum for the development of M. incognita was 1567- and 1070-degree days for the first and second trial, respectively.
In both trials, the gall index (GI) was higher in ‘Platense italiano’ than in ‘Trafalgar’ and ‘Virgilio’. In the first trial, no statistically significant differences were observed in the number of egg masses per gram of root.
This may be due to the high degree of susceptible cultivar infestation (GI=7.83), which severely affected root development.
In the second trial, ‘Platense italiano’ showed a higher number of egg masses g‑1 of root.
Aerial biomass was higher for ‘Trafalgar’ and ‘Virgilio’ in both trials, although there were no significant differences among cultivars with respect to root biomass, stem diameter, and number of clusters plant‑1. Overall, the resistant hybrids tested showed less damage by M. incognita than the susceptible cultivar.
Among the management tools, genetic resistance stands out as one of the pillars of integrated pest management.
In tomato (Solanum lycopersicum), resistance to Meloidogyne spp. is generally provided by the Mi gene.
The objective of this work was to evaluate the phenotypic performance of three tomato plant materials against M. incognita. For this purpose, two pots experiments were carried out in a cold greenhouse.
Two resistant commercial hybrids ‘Trafalgar’ and ‘Virgilio’, and the susceptible open-pollinated cultivar ‘Platense italiano’ were evaluated in two trials.
Each pot was inoculated with 2000 eggs/J2 of M. incognita. Within each plant material uninoculated pots were used as controls.
The thermal sum for the development of M. incognita was 1567- and 1070-degree days for the first and second trial, respectively.
In both trials, the gall index (GI) was higher in ‘Platense italiano’ than in ‘Trafalgar’ and ‘Virgilio’. In the first trial, no statistically significant differences were observed in the number of egg masses per gram of root.
This may be due to the high degree of susceptible cultivar infestation (GI=7.83), which severely affected root development.
In the second trial, ‘Platense italiano’ showed a higher number of egg masses g‑1 of root.
Aerial biomass was higher for ‘Trafalgar’ and ‘Virgilio’ in both trials, although there were no significant differences among cultivars with respect to root biomass, stem diameter, and number of clusters plant‑1. Overall, the resistant hybrids tested showed less damage by M. incognita than the susceptible cultivar.
Publication
Authors
D.P. Belladonna, C. Muscolino, J. Cacchiarelli, A. Garayalde, P.A. Polci, R.A. Rodríguez, J.A. Fernández, M.M. Comezaña
Keywords
nematode, genetic resistance, Mi gen, Solanum lycopersicum, integrated pest management
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