Biblioteca do Café

URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1

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2014 - 20182

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Autor: search.filters.author.Matos, Sara Inácia de

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    Characterization of resistance response of Coffea canephora genotypes to Meloidogyne incognita (Est I2) root-knot nematode
    (Editora UFLA, 2018-04) Santos, Anderson Vieira; Rocha, Rodrigo Barros; Silveira, Silvaldo Felipe da; Teixeira, Alexsandro Lara; Matos, Sara Inácia de; Vieira Júnior, José Roberto
    Meloidogynose is prominent among the factors that limit yield in C. canephora in the western Amazon, Brazil. It is caused by species of “root-knot nematode”; the most important and aggressive of these species for coffee is M. incognita. The aim of this study was to assist the selection of resistant genotypes by characterizing the reaction of 32 C. canephora clones to M. incognita (Est I2). These genotypes are selected plants from the Germplasm Bank of Embrapa Rondônia of the botanical varieties Conilon, Robusta and intervarietal hybrids. The experiments were conducted under greenhouse conditions by inoculating six seedlings for each clone with 10 ml of suspension containing 5000 eggs of a pure inoculum of M. incognita. At 150 days after inoculation, evaluations were made of fresh weight of roots (FWR), total number of galls (NG), total number of eggs (NE), and the nematode reproduction factor (RF=final population/initial population). In contrast with the susceptible controls of arabica coffee (RF=1.2) and tomato plants (RF=31.3), six clones of the Conilon botanical variety, five clones of the Robusta botanical variety and eight intervarietal hybrids reacted as resistant to M. incognita, exhibiting RF<1 and a reduced number of galls (NG mean = <10). The clones identified as resistant in this study were integrated in the coffee breeding program in Rondônia for development of cultivars resistant to the root-knot nematode adapted to tropical conditions.
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    Alternativas para o manejo integrado de nematoide-das-galhas do cafeeiro
    (Embrapa Rondônia, 2014-11) Vieria Júnior, José Roberto; Fernandes, Cléberson de Freitas; Matos, Sara Inácia de; Marreiros, José Airton Andrade; Freire, Tamiris Chaves; Fonseca, Aline Souza da; Sangi, Simone Carvalho; Maia, Daiane Zeferino; Silva, Domingos Sávio Gomes da
    O trabalho mostra os prejuízos econômicos e relata alternativas para o controle do nematoide-das-galhas do cafeeiro em Rondônia.