Severidade da antracnose em progênies F2 de feijão-fava obtidas por hibridização sem emasculação

Marilha Vieira de Brito; Yasmin Borges  Diniz; Karla Annielle da Silva Bernardo Brito; Carlos Humberto Aires Matos Filho; Verônica Brito da Silva; Ângela Celis  de Almeida Lopes; Maruzanete Pereira de Melo; Regina Lucia Ferreira-Gomes

doi:10.1590/1983-21252025v3812707rc

Authors

Marilha Vieira de Brito Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0002-6658-2264
Yasmin Borges Diniz Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0001-5370-7585
Karla Annielle da Silva Bernardo Brito Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0003-4801-0964
Carlos Humberto Aires Matos Filho Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0002-8375-9631
Verônica Brito da Silva Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0001-7739-5061
Ângela Celis de Almeida Lopes Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0002-9546-5403
Maruzanete Pereira de Melo Department of Agricultural Planning, Universidade Federal do Piauí, Teresina, Piauí, Brazil https://orcid.org/0000-0003-0110-8702
Regina Lucia Ferreira-Gomes Department of Plant Science, Universidade Federal do Piauí, Teresina, PI, Brazil https://orcid.org/0000-0002-7700-6959

DOI:

https://doi.org/10.1590/1983-21252025v3812707rc

Keywords:

Phytopathological assessment. Colletotrichum truncatum. Artificial hybridizations. Phaseolus lunatus. Progeny selection.

Abstract

The objective of this study was to obtain anthracnose-resistant lima bean progeny by artificial hybridization. The study was conducted at the Agricultural Sciences Center of the Federal University of Piauí (UFPI), Teresina – Piauí. For the F₂ phytopathological evaluation experiment, a completely randomized experimental design was used with four replicates per progeny and a plot consisting of one plant. For inoculation, the CT4 isolate of Colletotrichum truncatum was used at 10⁶ spores/mL, and a control plant was inoculated with autoclaved distilled water. Ten trifoliate leaves of each genotype were scanned from the intermediate region of the plant using ASSES 2.0. After assessing the severity, the average ratings for each population were calculated, classifying them into five categories according to the resistance. To conduct the analysis of variance, the severity data were transformed by and grouped by the test proposed by Scott and Knott (P < 0.05). All analyses were performed using the R and GENES programs. Seven days after inoculation, the progênies were divided into three groups. Groups “A” and “B” corresponded to genotypes classified as highly susceptible and group “C” to genotypes classified as moderately resistant and highly resistant. The genotypes BGP-UFPI 220, BGP-UFPI 251, BGP-UFPI 798, BGP-UFPI 832, BGP-UFPI 1000, and BGP-UFPI 1002 can be used as parents in lima bean improvement programs. Progenies that were moderately resistant and highly resistant, totaling sixteen, were selected for use in breeding programs aimed at anthracnose resistance.

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