Concentração foliar de nutrientes e morfologia floral em genótipos de Coffea canephora

Abstract

The search for highly productive and adapted genotypes for each producing region has driven the work of characterization and selection of superior and divergent genotypes. Understanding the genetic diversity in Coffea canephora, using the information obtained can favor the best reproductive management of crops, in addition to assisting breeding programs. Thus, considering the economic importance of the crop, the objective was to evaluate the genetic diversity of C. canephora based on nutritional characteristics for the first study and floral characteristics for the second. The first study, entitled “Genetic diversity in C. canephora genotypes for leaf nutrient concentration”, aimed to evaluate the leaf nutrient concentration in coffee genotypes in the pre-flowering and filling of coffee beans. The second, entitled "Genetic diversity in C. canephora based on floral morphological characteristics", aimed to evaluate the genetic diversity existing in Conilon coffee genotypes based on floral morphological characteristics. For both studies, multivariate analysis was performed, and it was found that there is genetic diversity among C. Canephora genotypes based on leaf nutrient concentration, as well as for floral morphological characteristics. Adopting a maximum limit of 60% of dissimilarity between the genotypes, the formation of four and three groups was observed by the UPGMA method for the foliar concentration of nutrients and floral morphological characteristics, respectively. Based on the results obtained and the information generated, the studies can serve as a basis for helping nutritional management and understanding the process of cross-pollination and reproduction of C. canephora. Also, assist in the use of genetic resources of interest in genetic improvement programs.