Response of Malpighia emarginata active germplasm bank accessions to Meloidogyne enterolobii parasitism.
Malpighia emarginata is cultivated in almost all Brazil and is considered an important agricultural crop. The root-knot nematode Meloidogyne enterolobii has been described as a major threat to this crop, causing great production losses. Due to the scarcity of information about the severity of this parasite in M. emarginata plants in Brazil, this study investigated M. enterolobii resistance of ten M. emarginata genotypes from the active germplasm bank of Universidade Federal Rural de Pernambuco. The experiment was conducted adopting a completely randomized design in a factorial arrangement of 11 x 2 x 5, where M. emarginata cuttings were inoculated with 10,000 eggs in a greenhouse. After 150 days, plants were evaluated for the following parameters: gall index, egg mass index, number of eggs per root system, number of eggs per gram of root, and reproduction factor. The accessions showed different responses depending on host x pathogen interaction, from susceptibility to moderate tolerance. Accessions 027-CMF and 031-CMF were considered tolerant to the nematode and could be of great value in new breeding programs for resistance to M. enterolobii infection.
Programa de Pós-Graduação em Agronomia/Melhoramento Genético de Plantas, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
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Moreira
Departamento de Biologia, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.|Programa de Pós-Graduação em Agronomia/Melhoramento Genético de Plantas, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
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Martins
Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.|Programa de Pós-Graduação em Agronomia/Melhoramento Genético de Plantas, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
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Musser
Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil romulommfilho@yahoo.com.br.
R M Moraes
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Filho
Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
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Maranhão
Programa de Pós-Graduação em Agronomia/Melhoramento Genético de Plantas, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
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Rossiter
Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
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Montarroyos
D000704:Analysis of Variance; D000818:Animals; D060467:Disease Resistance; D005838:Genotype; D029581:Malpighiaceae / Q000235:genetics / Q000254:growth & development / Q000469:parasitology*; D010271:Parasites / Q000502:physiology*; D010935:Plant Diseases / Q000469:parasitology; D012639:Seeds / Q000469:parasitology*; D014431:Tylenchoidea / Q000502:physiology*