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EnglishThe objective of this research was to quantify the genetic divergence of potential Coffea canephora parents, with the goal of developing progenies that associate the best traits of the Conilon and Robusta botanical varieties for hybrid vigor expression. Thus, 10 morphological and productive characteristics of 130 clones of Conilon and Robusta botanical varieties and their intervarietal hybrids were evaluated over 2 years. The experiment was conducted in a randomized block design with four replicates of four plants per plot. For selection of parents, the main component analysis was used to associate values with reference points obtained from the average of each botanical variety. The first two principal components allowed for the separation of the botanical varieties representing the variability contained in the original data with 76% for the first year and 69% for the second year. Although, the genotype × years interaction had significant effects, there were minor differences in the grouping from one year to the next, which is associated with the higher repeatability estimates observed in this study. It was observed that crosses with the 16-1-81I, 9-1-82L, and 13-1-61I parents of the botanical variety Robusta and the 167I, 890E, and 130I parents of the Conilon botanical variety presented greater potential for obtaining selection gains. Key words: Coffea canephora; genetic divergence; heterosis portuguesO objetivo deste trabalho foi quantificar a divergencia genetica entre matrizes de C. canephora visando desenvolver progenies que associem caracteristicas das variedades botânicas Conilon e Robusta a expressao do vigor do hibrido. Para isso, foram avaliadas dez caracteristicas morfologicas e produtivas de 130 clones das variedades botânicas Conilon, Robusta e de hibridos intervarietais, ao longo de dois anos, em delineamento de blocos casualizados com quatro repeticoes de quatro plantas por parcela. Para selecao de genitores foi utilizada a tecnica de componentes principais associada a pontos referenciais obtidos a partir da media de cada variedade botânica. Os dois primeiros componentes principais permitiram a separacao das variedades botânicas e dos hibridos intervarietais com uma representacao da variabilidade contida nos dados originais de 76% no primeiro ano e 69% no segundo ano. Apesar da significância da interacao genotipos x anos, observou-se pouca diferenca no agrupamento ao longo do tempo, o que esta associado as maiores estimativas de repetibilidade observadas nesse estudo. Observou-se que as matrizes 16-1-81I, 9-1-82L e 13-1-61I da variedade botânica Robusta e as matrizes 167I, 890E e 130I da variedade botânica Conilon apresentaram maior potencial para a obtencao de ganhos com a selecao. Palavras-chave: Coffea canephora; divergencia genetica; heterose

Selection of Coffea canephora parents from the botanical varieties Conilon and Robusta for the production of intervarietal hybrids