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- Title
Selection of tomato genotypes with high resistance to Tetranychus evansi mediated by glandular trichomes.
- Authors
de Souza Marinke, Luana; de Resende, Juliano Tadeu Vilela; Hata, Fernando Teruhiko; Dias, Diego Munhoz; de Oliveira, Luiz Vitor Barbosa; Ventura, Maurício Ursi; Zanin, Daniel Suek; de Lima Filho, Renato Barros
- Abstract
The tomato crop is of great importance, being the second most produced vegetable in the world. Among the factors that limit its production are the attack of pests and diseases. One of the alternatives for this problem is selecting more resistant genotypes to pests. In this sense, this research evaluated the relationship between acylsugar contents, types of leaf trichomes and resistance mechanisms in genotypes of the red mite (Tetranychus evansi). For this purpose, F2BC2 tomato genotypes with contrasting levels of acylsugars were submitted to the no-choice test and trichome count. Fourteen treatments, as well as the parental Solanum lycopersicum 'Redenção' (susceptibility-standard) and Solanum pennellii LA-716 (resistance-standard) were tested. As for glandular trichomes, the genotypes that presented the highest number of type IV trichomes were LA 716 and RVTA-232, and the lowest were RVTA-205, RVTA-376, RVTA-385 and 'Redenção'. For egg count, the lowest values found were in the LA-716 genotype and the highest values were RVTA-205, RVTA-227, RVTA-376, RVTA-385 and 'Redenção'. These results corroborate the evaluation of the number of trichomes presented, since the most resistant genotype and the most susceptible to the mites coincided with those with the highest and lowest number of glandular trichomes. The genotypes selected for high levels of acylsugars in the F2BC2 population showed a direct relationship with glandular trichomes density and enhanced resistance to the red mite, highlighting the genotypes RVTA-28, RVTA-39 and RVTA-232.
- Subjects
TRICHOMES; TETRANYCHUS; GENOTYPES; TOMATOES; MITES
- Publication
Phytoparasitica, 2022, Vol 50, Issue 3, p629
- ISSN
0334-2123
- Publication type
Article
- DOI
10.1007/s12600-022-00984-6