Abstract: The authors would like to thank José Augusto Demartini Landi and his family for granting access to the plantation, as well as the Centro de Ciências Agrárias e Engenharias of the Universidade Federal do Espírito Santo (CCAE/UFES) for providing access to the necessary facilities and laboratories. Additional support from the Fundação para a Ciência e a Tecnologia I.P., Portugal, through the projects CEF. Publisher Copyright: © 2025 by the authors.Licensee MDPI, Basel, Switzerland. ; The Coffea canephora market has grown significantly, driven by its economic relevance and improvements in beverage quality. Developing varieties adapted to local edaphoclimatic conditions is essential for supporting smallholder farmers, increasing productivity, and ensuring quality in the face of environmental challenges. This study evaluated 27 genotypes under two irrigation regimes using a split-plot design in a completely randomized block arrangement, with four replicates and three plants per plot. Growth and yield parameters were assessed. Genotypes 102, 103, 105, 106, 202, 209, 301, 303, and 305 showed significantly higher yields under full irrigation—up to 60% greater than under minimal irrigation—demonstrating strong responsiveness to water availability. In contrast, genotypes 203 and 206 performed better under minimal irrigation, with 29% higher yields, suggesting lower water requirements or greater drought tolerance. These findings highlight the potential for selecting genotypes suited to transitional altitudes that can benefit from targeted irrigation strategies. The combined use of irrigation and altitude-specific cultivation represents a viable and necessary approach to maximizing genetic potential, optimizing water use, and enhancing the sustainability of C. canephora cultivation in regions facing climate variability. ; publishersversion ; published
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