Evaluation of genetic divergence of coffee genotypes using the volatile compounds and sensory attributes profile

Abstract

The quality of the coffee beverage is related to the chemical, physical, and sensory attributes of the coffee beans that vary with the geographic location of the crop, genetic factors, and post-harvest processing. So, the objective of this study was to evaluate the genetic divergence of 27 genotypes of Coffea canephora using the volatile compounds and sensory attributes profile to select genotypes that produce a coffee beverage with high sensory quality. This genetic diversity was estimated from the Euclidean distance matrix using non-standard data and the Unweighted Pair-Group Method Using Arithmetic Averages (UPGMA).The 2-furyl-methanol, 4-ethenyl-2-methoxyphenol, furfural, 5-methylfurfural, methylpyrazine, and 2,6-dimethylpyrazine were predominating volatile compounds in the genotypes. The sensory attributes had a positive Pearson's correlation with the total score. The volatile compounds had a different relative contribution to the genetic divergence between the genotypes of C. canephora. The 4-ethenyl-2-methoxyphenol, 2-furyl-methanol, and furfural were volatile compounds that most contributed to the formation of the groups in the UPGMA dendrogram. The relative contribution of sensory attributes to dissimilarity among genotypes was 6.42% to 20.20%. Therefore, this study verified the relative contribution of volatile compounds, in specially 4-ethenyl-2-methoxyphenol, 2-furylmethanol, and furfural, and sensory attributes (flavor, mouthfeel, and bitterness/sweetness) to the genetic divergence between the genotypes of the three clonal varieties. Thus, this work points out compounds that positively contribute to the sensory quality of the Conilon coffee beverage.

Microorganismos de suelo y su relación con la calidad de la bebida de café: Una revisión

“…La calidad en la bebida de café es el resultado de factores y condiciones del suelo (Veloso et al, 2020), altitud (Tolessa et al, 2017), genética (Machado et al, 2022), sombra (Torrez et al, 2023), manejo agronómico (Cabrera-Rodríguez et al, 2020;Jurburg et al, 2020), plagas y/o enfermedades (Echeverria-Beirute et al, 2018). Por ejemplo, en el cultivo de café arábica, altitudes elevadas influye directamente en la composición química de los granos, así como el perfil microbiano y sensorial, en particular el aroma y fragancia (Martins et al, 2020).…”

Untargeted Metabolomic Approach Based on UHPL-ESI-HRMS to Investigate Metabolic Profiles of Different Coffea Species and Terroir

“…Furthermore, using the technique of single nucleotide polymorphisms of molecular markers, Alkimim et al(2018) showed higher genetic distance between groups of conilon and robusta (C. canephora) than among varieties within C. arabica species(Akpertey et al, 2022;Alkimim et al, 2018). In the case of C. canephora, allogamy and gametophytic self-incompatibility are responsible for the high heterogeneity and genetic variability of the species(Machado et al, 2022).…”