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http://biblioteca.incaper.es.gov.br/digital/handle/item/5352| Título: | Reaction of tomato germplasm accessions to root-knot nematode (Meloidogyne incognita). |
| Autor(es): | LAMBERT, J. C.  SOUZA, A. F. de SANTOS, T. de O. ALMEIDA, R. N. de OLIVEIRA, A. de F. M. de SOUZA NETO, J. D. de SANTOS JUNIOR, A. C. MOULIN, M. M. José Carlos Lambert, IFES Santa Teresa; Antonio Fernando de Souza, IFES Santa Teresa; Talles de Oliveira Santos, UENF; Rafael Nunes de Almeida, Incaper; Aparecida de Fátima Madella de Oliveira, IFES; José Dias de Souza Neto, IFES; Alexandre Cristiano Santos Júnior, IFES; Monique Moreira Moulin, IFES. |
| Data do documento: | 28-Abr-2026 |
| Editor: | Ciência Rural, v. 56, n. 4, p. 1-10, 2026. |
| Descrição: | Tomato is one of the most produced and consumed vegetables in the world. Among the range of diseases affecting tomato plants are the root-knot nematodes of the genus Meloidogyne, which cause significant annual production losses. In Brazil, species of the genus Meloidogyne are the main culprits of damage to tomato crops, with Meloidogyne incognita being the most prevalent. Its control is quite challenging, as chemical control is not very effective, costly, and poses risks of environmental and human contamination. The most economical and effective alternative is the use of resistant genotypes selected through breeding programs. This study evaluated the tomato accessions for resistance to M. incognita. A total of 43 accessions were evaluated, of which 40 belonged to the Germplasm Bank of Ifes Campus of Alegre, along with two commercial cultivars, ?BRS Portinari? and ?Grande HT?, which are resistant to Meloidogyne incognita and were used as controls, as well as the ?Santa Clara? cultivar, which is susceptible to Meloidogyne spp. and was used as a reference. Two experiments were conducted in a shaded nursery using a randomized block design with five replications and six plants as experimental unit. Four thousand eggs + J2 of M. incognita were inoculated per pot, and 65 days after planting, the genotypes were evaluated. The extraction and counting of nematode eggs were performed. The classification of resistance levels was conducted using the reproduction factor (FR) and reproduction index (IR). It was found that eight accessions (Ifes 5, 14, 23, 26, 27, 33, 44, and 45) exhibited a reproduction factor less than one (FR < 1), classifying them as resistant in both experiments, consistent with the results obtained for the reproduction index. A consistent response was observed among the 43 evaluated genotypes regarding resistance and susceptibility in both experiments. According to the two classifications used, six accessions and the two commercial cultivars used as controls were considered promising for further study and use as sources of resistance to M. incognita, as well as in targeted crosses in breeding programs. |
| URI: | http://biblioteca.incaper.es.gov.br/digital/handle/item/5352 |
| Aparece nas coleções: | Memória Técnica do Incaper |
Arquivos associados a este item:
| Arquivo | Descrição | Tamanho | Formato | |
|---|---|---|---|---|
| tomatogermplasm.pdf | 1,39 MB | Adobe PDF | Visualizar/Abrir |
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