Titre:	Selection of cowpea (Vigna unguiculata [L.] Walp) accessions resistant to root-knot nematode
Auteur(s):	Silva, Thais França Peixoto, Gustavo Henrique Silva Souza, Caio Felipe de Barros Roberts, Philip Alan Santos, Jansen Rodrigo Pereira Cares, Juvenil Enrique
metadata.dc.identifier.orcid:	https://orcid.org/0000-0001-5030-4449
metadata.dc.contributor.affiliation:	Universidade de Brasília, Departamento de Fitopatologia Universidade de Brasília, Departamento de Fitopatologia Universidade de Brasília, Departamento de Fitopatologia University of California, Department of Nematology Universidade Federal de Santa Maria, Departamento de Defesa Fitossanitária Universidade de Brasília, Departamento de Fitopatologia
Assunto::	Feijão - doenças e pragas Nematóide das galhas
Date de publication:	2-mai-2023
Editeur:	Wiley
Référence bibliographique:	SILVA, Thais França S. et al. Selection of cowpea (Vigna unguiculata [L.] Walp) accessions resistant to root-knot nematode. Crop Science, [S. l.], v. 63, p. 2067–2078, 2023. DOI: https://doi.org/10.1002/csc2.20982.
Abstract:	Cowpea, Vigna unguiculata, is a legume adapted to regions with a tropical climate and limited water resources, and it has become a basic food source and income gener ator. Root-knot nematodes (Meloidogyne spp.) cause substantial damage to the root system, resulting in yield losses. Genetic resistance is one of the most efficient man agement methods. The objective of this study was to generate information on genetic resistance to Meloidogyne incognita and Meloidogyne javanica of Brazilian cowpea genotypes. For this, 18 accessions of cowpea from the collection of Embrapa Meio Norte and six control accessions of cowpea were tested in completely randomized design with six replications, evaluated 60 days after inoculation, and carried out twice in time. To assess root penetration of nematodes and root gall formation in NIL-CB3- isoline, which allows reproduction but limits gall formation, nematodes inside the roots were stained with acid fuchsin, after inoculation with 5000 J2, with estimates at 72 h time-points up to 28 days. None of the 18 accessions from Embrapa showed resistance to M. javanica, but accessions MNC06-895-1, MNC04-14, MNC06-909- 6, 98, MNCO4-907-35, and Am60-15 showed resistance to M. incognita. There was a reduction in the number and size of galls in the NIL-CB3 egg isoline, and an increase in formation of males, which are not important for parasitism. Given the importance and prospects for expansion of the cowpea crop throughout Brazil, the results of this study contribute to the knowledge on the reaction of Brazilian cowpea genotypes to the root-knot nematode.
metadata.dc.description.unidade:	Instituto de Ciências Biológicas (IB) Departamento de Fitopatologia (IB FIT)
metadata.dc.description.ppg:	Programa de Pós-Graduação em Fitopatologia
DOI:	https://doi.org/10.1002/csc2.20982
metadata.dc.relation.publisherversion:	https://acsess.onlinelibrary.wiley.com/doi/full/10.1002/csc2.20982
Collection(s) :	Artigos publicados em periódicos e afins

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