BEHAVIOR OF MORPHOLOGICAL CHARACTERISTICS OF GRAINS BETWEEN AMAZONIAN ROBUSTA CULTIVARS IN IRRIGATED AND NON-IRRIGATED ENVIRONMENTS IN RONDÔNIA

Abstract

Understanding the behavior of coffee plants regarding the physical characteristics of their beans when subjected to abiotic stresses is of great importance. This study aimed to verify the physical characteristics of beans from intervariant hybrids grown in Rondônia in two environments: non-irrigated (E1) and irrigated (E2). The traits were evaluated through physical classification of bean dimensionality, mass, and engineering properties. The association between traits was interpreted considering correlation estimates, and significance was interpreted by the F test of the individual and joint analysis of variance. The joint analysis of variance identified an interaction between genotype x environment, and individual analysis demonstrated a significant difference between cultivars in both environments. In E1, 40% of the cultivars had greater bean length, while 20% in E2. Regarding bean mass, 70% had a higher value in E1 and 10% in E2. The engineering properties, respectively, 30%, 50% and 50% showed significant differences between the environments for particle sphericity, volume and density. The difference in the behavior of cultivars between environments is notable, with some tending to present their best characteristics in an irrigated environment and others maintaining their performance under water stress.