Potencial agronômico e divergência genética na seleção de linhagens de feijão-mungo em várzea tropical

Tamara Thalia Prólo; José Avelino Cardoso; Maurisrael de Moura Rocha; Inocencio Júnior de Oliveira; Luziano Lopes da Silva; Manoel Mota dos Santos; Jennyfer de Fátima Rodrigues  Martins; Ildon Rodrigues do Nascimento

doi:10.1590/1983-21252025v3812539rc

Authors

Tamara Thalia Prólo Universidade Federal do Tocantins, Gurupi, TO, Brazil https://orcid.org/0000-0002-8921-3250
José Avelino Cardoso Instituto Federal do Tocantis, Dianópolis, TO, Brazil https://orcid.org/0009-0002-7875-8594
Maurisrael de Moura Rocha Embrapa Meio Norte, Teresina, PI, Brazil https://orcid.org/0000-0001-5817-2794
Inocencio Júnior de Oliveira Embrapa Arroz e Feijão, Palmas, TO, Brazil https://orcid.org/0000-0002-7964-6431
Luziano Lopes da Silva Instituto Federal do Tocantins, Gurupi, TO, Brazil https://orcid.org/0000-0003-0487-6301
Manoel Mota dos Santos Universidade Federal do Tocantins, Gurupi, TO, Brazil https://orcid.org/0000-0002-6984-1399
Jennyfer de Fátima Rodrigues Martins Universidade Federal do Tocantins, Gurupi, TO, Brazil https://orcid.org/0009-0001-2320-495X
Ildon Rodrigues do Nascimento Universidade Federal do Tocantins, Gurupi, TO, Brazil https://orcid.org/0000-0002-8348-9993

DOI:

https://doi.org/10.1590/1983-21252025v3812539rc

Keywords:

Vigna radiata. Breeding programs. Clustering. Dissimilarity.

Abstract

Mungbean (Vigna radiata L.) is a Fabaceae species cultivated in several regions in Brazil. In Tocantins state, however, the few cultivars available are not indicated for the region, making it essential to select and subsequently recommend new cultivars. This study aimed to assess the agronomic potential and genetic divergence of mungbean lines to support the development of cultivars adapted to tropical floodplain conditions in Tocantins. Two trials were conducted in a randomized block design with four replications under tropical floodplain conditions, in the municipalities of Lagoa da Confusão and Formoso do Araguaia, Tocantins, Brazil. A total of 18 mungbean lines and two cultivars were studied. Were evaluated pod weight, pod length, number of grains per pod, 100-grain weight, grain yield, and grain index. Lines BRA-O84883 and BRA-O84654-1, with grain yields of 1,415.4 and 1,408.8 kg ha⁻¹, respectively, exhibited high productivity, good results for the number of grains per pod and grain index, and were quite similar. Grain yield contributed most to genetic dissimilarity between the lines, with BRA-084638 and BRA-084794 the most divergent. To generate high genetic variability in segregating populations for future selection, it is recommended that crosses between lines BRA-084654-1 and BRA-O84883 and the cultivars BRS Esperança and BRS MG Camaleão, which combine genetic divergence and high grain yield, be part of mungbean breeding for cultivation in tropical floodplains in Tocantins, Brazil.

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