Identifying cotton genotypes resistant to Meloidogyne incognita race 3 using Blup

Authors

Abstract

Few genetic resistance sources to root-knot nematodes are known for cotton, and there are no cultivars combining both resistance and good agronomic attributes in Brazil. Techniques that allow an efficient selection of promising sources of genetic resistance are needed. This study aimed to identify cotton genotypes resistant to Meloidogyne incognita race 3 via REML/Blup. The experiment was completely randomized, with 32 genotypes and seven replicates, in a protected environment. The statistical model 83 was used. The root weight, final population, reproduction factor and reproduction index were estimated. The final population and reproduction index presented the highest values for genotypic variance and genetic variation coefficients, indicating a favorable situation for the selection of cotton genotypes resistant to the nematode. The mean heritability (h2mg) of the genotype was higher than 85 % for the final population, reproduction factor and reproduction index, opening a possibility of selection success based on genotype means. The genotypes CS8601, SA2572, Coodetec 404 and BJ 3128 are promising for crosses aiming the selection of genotypes resistant to the nematode.

KEYWORDS: Gossypium spp., genetic resistance, root-knot nematode.

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Author Biography

Edgard Henrique Costa Silva, Universidade Estadual Paulista, Departamento de Ciências da Produção Agrícola, Jaboticabal, SP, Brasil.

Doutorando em Agronomia (Produção Vegetal) pela Faculdade de Ciências Agrárias e Veterinárias da UNESP, Câmpus de Jaboticabal. Mestre em Agronomia (Produção Vegetal) pela Faculdade de Ciências Agrárias e Veterinárias da UNESP, Câmpus de Jaboticabal (2016). Engenheiro Agrônomo pela Universidade Federal do Tocantins com período sanduíche na grande école Agrocampus Ouest (Angers, França) (2014). Tem experiência em olericultura, melhoramento de olerícolas, enxertia, manejo de nematoides de galhas, cultura do quiabeiro, fitotecnia e extensão rural.

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Published

2022-02-14

How to Cite

SILVA, E. H. C.; CANDIDO, W. dos S.; SANTOS, L. da S. Identifying cotton genotypes resistant to Meloidogyne incognita race 3 using Blup. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 52, p. e70515, 2022. Disponível em: https://revistas.ufg.br/pat/article/view/70515. Acesso em: 21 nov. 2024.

Issue

Vol. 52 (2022)

Section

Research Article

License

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