Title:	Genetic diversity and morpho-agronomic characterization of Vigna unguiculata (L.) Walp genotypes under heat stress.
Authors:	SILVA, W. O. da NASCIMENTO, T. L. do PEREIRA NETO, W. SILVA, J. L. da SANTOS, C. B. dos LUZ, T. A. NASCIMENTO, L. A. do ROCHA, M. de M. MELO, N. F. de ANGELOTTI, F.
Affiliation:	WESLLEY OLIVEIRA DA SILVA, UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA; TIAGO LIMA DO NASCIMENTO, FUNDAÇÃO DE AMPARO À CIÊNCIA E TECNOLOGIA DE PERNAMBUCO; WISLAYNE PEREIRA NETO, UNIVERSIDADE DE PERNAMBUCO; JADSON LIMA DA SILVA, UNIVERSIDADE DE PERNAMBUCO; CAMILA BARBOSA DOS SANTOS, UNIVERSIDADE DE PERNAMBUCO; TAILANE AMORIM LUZ, UNIVERSIDADE DE PERNAMBUCO; LAYANA ALVES DO NASCIMENTO, UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA; MAURISRAEL DE MOURA ROCHA, CPAMN; NATONIEL FRANKLIN DE MELO, CPATSA; FRANCISLENE ANGELOTTI, CPATSA.
Date Issued:	2026
Citation:	Agronomy, v. 16, n. 3, p. 312, 2026.
Description:	Global warming poses a threat to food security, particularly for essential crops like cowpea, which exhibits sensitivity to heat stress. This study aimed to evaluate the morpho-agronomic diversity of cowpea genotypes under different daily temperature regimes. The experiment was conducted in growth chambers, and biometric and productive traits were measured to quantify genetic divergence using Mahalanobis distance and UPGMA clustering. Temperature increases markedly altered trait expression. Under the 20–26–33 °C regime, 100-grain weight, leaf dry weight, pod weight, and stem dry weight accounted for 54.44% of the total variation. Under the higher temperature regime (24.8–30.8–37.8 °C), number of pods, plant height, stem fresh weight, and leaf dry weight explained 67.27% of the diversity, evidencing the impact of heat stress on vegetative and productive traits. Cluster analysis identified five distinct groups, confirming genetic variability and temperature-dependent dissimilarity patterns. Genotypes Bico de Ouro 17-53, Bico de Ouro 17-33 and BRS Tumucumaque maintained higher grain number and grain weight under elevated temperatures, whereas others showed yield reductions of up to 65%. These findings demonstrate exploitable genetic variability for heat tolerance in cowpea and support the use of morpho-agronomic traits as effective criteria for selecting genotypes adapted to warmer environments.
Thesagro:	Mudança Climática Feijão Segurança Alimentar Melhoramento Genético Vegetal
NAL Thesaurus:	Climate change Cowpeas Food security Genetic improvement Heat tolerance
Keywords:	Tolerância ao calor Mudança do clima
DOI:	https://doi.org/10.3390/agronomy16030312
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAMN)