AVALIAÇÃO DE ACESSOS DE FEIJÃO-FAVA EM CONDIÇÕES DE ALTAS TEMPERATURAS

Eulilia Oliveira              Machado; Gabriel Viana Ferraz; Rafael da Costa Almeida; Ângela Celis de Almeida  Lopes; Regina Lucia Ferreira                                        Gomes; Verônica Brito da Silva

doi:10.1590/1983-21252022v35n406rc

Authors

Eulilia Oliveira Machado Department of Biology, Universidade Federal do Piauí, Teresina, PI https://orcid.org/0000-0001-8258-7527
Gabriel Viana Ferraz Department of Biology, Universidade Federal do Piauí, Teresina, PI https://orcid.org/0000-0002-4243-6780
Rafael da Costa Almeida Department of Biology, Instituto Federal de Educação, Ciência e Tecnologia do Piauí , Pedro II, PI https://orcid.org/0000-0001-8067-546X
Ângela Celis de Almeida Lopes Department of Plant Science, Universidade Federal do Piauí, Teresina, PI https://orcid.org/0000-0002-9546-5403
Regina Lucia Ferreira Gomes Department of Plant Science, Universidade Federal do Piauí, Teresina, PI https://orcid.org/0000-0002-7700-6959
Verônica Brito da Silva Department of Plant Science, Universidade Federal do Piauí, Teresina, PI https://orcid.org/0000-0001-7739-5061

DOI:

https://doi.org/10.1590/1983-21252022v35n406rc

Keywords:

Phaseolus lunatus. Abortion of flowers and pods. Thermal stress. Pearson's linear correlation. UPGMA method.

Abstract

Lima bean (Phaseolus lunatus L.) develops at an optimal temperature in the range of 20–30°C, temperatures above 30–35°C compromise the photosynthetic efficiency of the crop. Considering the importance of lima bean cultivation, the objective of this study was to carry out a morphoagronomic and phenological characterization of 46 lima bean accessions tolerant to high temperatures from the core collection of lima bean at the Universidade Federal do Piauí. The experiment was conducted from February to July 2021 in a completely randomized block design with four replications, where the plot consisted of a pot with two plants. Genotype characterization was performed based on 20 morphoagronomic and phenological descriptors of lima bean. Based on Pearson's correlation, the number of emitted and aborted flowers had a greater genetic correlation with the total number of seeds and pods produced. Pod length and width were positively correlated with seed thickness, length, and width. Five groups were formed based on UPGMA grouping. It was observed that the UFPI-922 and UFPI-945 accessions had a higher performance under high-temperature conditions in relation to the number of flowers and pods emitted, as well as lower values for the number of aborted pods. The accessions UFPI-1037, UFPI-876, UFPI-1036, UFPI-1028, UFPI-1052, UFPI-1064, UFPI-1038, and UFPI-1062 are promising for precocity, productivity, emission of flowers and pods formed, and can be used in breeding programs.

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