SNP markers identification by genome wide association study for chemical quality traits of coffee (Coffea spp.) Germplasm.

Background: Coffee quality is an important selection criterion for coffee breeding. Metabolite profiling and Genome-Wide Association Studies (GWAS) effectively dissect the genetic background of complex traits such as metabolites content (caffeine, trigonelline, and 5-caffeoylquinic acid (5-CQA)) in coffee that affect quality. Therefore, it is important to determine the metabolic profiles of Coffea spp.

On the soil-bean-cup relationships in Coffea arabica L.

Background: The relationships between soil and coffee beans variables were evaluated and then the influence of bean composition on cup quality attributes was computed by means of relation studies. A total of 139 coffee and soil samples were collected directly from the same number of coffee plantations in Chiapas, Mexico.

Results: In the elemental composition, only phosphorus, potassium, calcium, and copper in coffee beans had a significant (P < 0.