Estimation of genetic parameters and resistance to Meloidogyne spp. in melon genotypes

Root-knot nematodes (Meloidogyne spp.) are one of the major pests of agricultural crops worldwide. In Brazil, these nematodes are widely distributed in melon fields, and there are no reports of resistant melon cultivars. This study aimed to estimate genetic variance components for the selection of m...

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Detalles Bibliográficos
Autores: Macedo da Silva, Edicleide [UNESP], Peixoto Fernandes, João Pedro [UNESP], Dalvan do Nascimento, Daniel [UNESP], Gomes-Messias, Lucas Matias, Oliveira, Aline [UNESP], Kobayashi, Bruna Fukumoto [UNESP], Ferreira, Rivanildo Júnior [UNESP], Martins Soares, Pedro Luiz [UNESP], Braz, Leila Trevisan [UNESP]
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:Brasil
Institución:Universidade Estadual Paulista (UNESP)
Repositorio:Repositório Institucional da UNESP
Idioma:inglés
OAI Identifier:oai:repositorio.unesp.br:11449/233986
Acceso en línea:http://dx.doi.org/10.1016/j.cropro.2021.105904
http://hdl.handle.net/11449/233986
Access Level:acceso abierto
Palabra clave:Cucumis melo
Genetic gain
Genetic resistance
Genotypic value
Root-knot nematode
Rootstock
Descripción
Sumario:Root-knot nematodes (Meloidogyne spp.) are one of the major pests of agricultural crops worldwide. In Brazil, these nematodes are widely distributed in melon fields, and there are no reports of resistant melon cultivars. This study aimed to estimate genetic variance components for the selection of melon genotypes resistant to Meloidogyne incognita, M. javanica, and M. enterolobii. Two experiments were carried out in a completely randomized design, the first with 14 replications and the second with 10 replications, in a factorial design. Thirteen melon genotypes were tested. In both experiments, the total number of eggs and juveniles (TNEJ) was estimated and used to determine the reproduction factor (RF) and reproduction index (RI) of nematodes. Melon genotypes showed wide genetic variability in resistance to the three nematode species, resulting in high estimates of heritability (92%) and accuracy (96%). Such findings indicate the possibility of genetic gains with selection. Melon AC-09, PI157082, and ‘Ouro’ were found to be sources of resistance to M. incognita, M. javanica, and M. enterolobii, respectively.

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