Dynamic of dry matter accumulation in berry, bean, and husk of six Coffea canephora genotypes during fruit maturation

Abstract

Knowledge about the dynamics of dry matter (DM) accumulation in the berry components (bean and husk) throughout maturation process could help in the definition of the most adequate moment for the harvest of each genotype. For that, were studied the berry, bean, and husk DM accumulation dynamics during the fruit maturation process of six Coffea canephora genotypes, to identify the best berry harvesting stage. Berry samples were collected every two weeks at nine maturation moments/stages. The DM accumulation was initially the highest for berry and bean, while the highest increases in husk DM happened latter. Second order polynomial regressions were fitted for berry, bean, and husk DM accumulation over time. The berry, bean and husk DM accumulation increased as fruit maturation progressed, attaining the highest values in the final stages of red berries. Beira Rio 8 genotype presented the highest DM accumulation in berries, beans, and husk. Bamburral and P1 showed the lowest berry fresh mass (FM) to bean DM ratios, while A1 showed the greatest berry FM to bean DM ratio. Not only the absolute berry and bean yield must be considered for high productive genotype selection, but also bean DM performance must account in the characterization of commercial coffee yields.