Coffee Science - v.13, n.3, 2018
URI permanente para esta coleçãohttps://thoth.dti.ufv.br/handle/123456789/10546
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Item Relative importance and interaction of roasting variables in coffee roasting process(Editora UFLA, 2018-07) Garcia, Cinthia da Conceição; Pereira Netto, Annibal Duarte; Silva, Michelle Costa da; Catão, Alexandre Alves; Souza, Iasmim Amorim de; Farias, Larissa Silva; Paula, Thiago Nunes Emerich de; Paula, Mateus Nunes Emerick de; Reis, Sandro Coutinho dos; Silva Junior, Ademário Iris daThis work describes a study in which levels of variables that may control the coffee roasting process were set in an experimental matrix that aimed at measuring their relative importance and the interaction between variables. Each control variable was set in two levels and the combination of these levels elicited 32 different roasting procedures. The physical responses were determined for a specific roaster. Experimental planning allowed the determination of the relative influence of each control variable in each response variable for this roaster. This led to a primary quantification of the major factors that contribute to the roasting process and the relative importance of roast parameters that influence the quality of the coffee beverage. Moreover, these results indicated what interactions could occur between these parameters. The characterization of the relative influence of control variables is a first approach to model the roaster response and the coffee quality that each roasting can achieve.Item Contribution of agronomic traits to the coffee yield of Coffea canephora Pierre ex A. Froehner in the western amazon region(Editora UFLA, 2018-07) Spinelli, Victor Mouzinho; Moraes, Marcos Santana; Alves, Darlan Sanches Barbosa; Rocha, Rodrigo Barros; Ramalho, André Rostand; Teixeira, Alexsandro LaraThe evaluation of morphological characters related to the hulled coffee yield subsidizes the selection of Coffea canephora plants that combine a set of favorable traits. The aim of this study was to evaluate the direct and indirect effects of agronomic traits on the production of hulled coffee to subside the plant selection. To this, nine morphological descriptors were evaluated of 130 clones of the botanical varieties Conilon and Robusta over two crop years in the experimental field of Embrapa, in the municipality of Ouro Preto do Oeste, state of Rondônia (RO). To quantify the genetic variability the path analysis and the Scott Knott cluster test were used. The effect of genotype x year interaction was significant for eight of the nine characteristics analyzed. The genotypes were clustered in three to five classes, subsidizing the establishment of a scale to evaluate the variability of this genetic resource. Pathway analysis indicated that the number of plagiotropic branches and the number of rosettes per productive branch were the traits that exhibited the greatest direct effect on hulled coffee yield. These results show that it is possible to select plants with complementarity traits which favor a higher production of hulled coffee.