Abstract
To contribute to increasing ear rot resistance in new popcorn cultivars, the present study was aimed to identify germplasm with resistance to Fusarium ear rot (FER) in popcorn inbred lines. The study was conducted in Campos dos Goytacazes, Rio de Janeiro, Brazil. Ear rot severity was evaluated in 176 lines of different populations of popcorn from South America. In the first stage, the lines were evaluated in two seasons under natural infection conditions in the field, in a design of groups of experiments arranged in randomized blocks. In the second stage, the genotypes selected with potential FER resistance had their kernels evaluated in a blotter test to confirm the absence of the pathogen. Finally, in the third stage, the lines selected as candidates for resistance in the previous stages were again evaluated under artificial inoculation conditions in a protected environment. The selection of genotypes with potential use for the breeding of the crop considered the possibilities of gains in heterosis and the local phytosanitary requirements for the sale of popcorn grains. Of the 176 evaluated lines, nine exhibited resistance to FER and will be used for the composition of crossing blocks aiming at the generation of resistant hybrids. The field evaluation stages and confirmation of the presence of the pathogen via the blotter test were essential for saving resources and optimizing the selection process.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We are thanks to Fundação Carlos Chagas Filho de Amparo à Pesquisa do Rio de Janeiro (FAPERJ) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for financial support. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior –Brasil (CAPES) –Finance Code 001.
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Conceptualization: MV, ATAJ; Methodology: RNA, JCGS; Formal analysis and investigation: FVV, LVC, NMOR, RNA; Writing—original draft preparation: RNA, NMOR, MV; Writing—review and editing: MV, ATAJ, JCGS; Funding acquisition and supervision: MV.
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de Almeida, R.N., Vivas, M., Ribeiro, N.M.O. et al. Fusarium ear rot resistance in South American popcorn lines. Trop. plant pathol. 48, 656–666 (2023). https://doi.org/10.1007/s40858-023-00607-3
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DOI: https://doi.org/10.1007/s40858-023-00607-3