Banca de DEFESA: GENIS DOS SANTOS E SILVA

GENOTYPE AND ENVIRONMENT INTERACTION FOR NUTRITIONAL CONTENT OF CLONAL CULTIVARS OF Coffea canephora

Coffee, Robusta, nutritional standard

Coffee trees C. canephora are obligate allogamous plants, which results in great heterogeneity in seed-propagated crops. Therefore, cultivars of this species are commonly propagated asexually, using the cutting-type cloning technique, which allows the maintenance of the superior characteristics of the mother plant in the seedlings. In 2019, Embrapa made ten clonal cultivars (popularly known as clones) available for planting in the western Brazilian Amazon. The objective of this study was to evaluate the nutrient contents in the index leaves of these cultivars in contrasting environments in order to conclude about the effects of the genotype × environment interaction on the nutritional patterns of these coffee trees. Leaves of 10 cultivars and eight environments were evaluated. There was no effect of the genotype × environment interaction for nutrient contents, except for magnesium and copper. On the other hand, there was an interaction effect for all three vegetative characteristics evaluated: leaf dry mass, leaf area and specific dry mass. It is concluded that, both for the foliar nutrient contents and for the vegetative characteristics of the leaves, the genetic effects prevail over the environmental effects.