Caracterização química de genótipos Brasileiros de aveia (Avena sativa L. ) / Chemical characterization of Brazilian oat genotypes

The chemical composition of oats has been poorly studied in Brazil. Therefore, the objective of this study was to characterize the main chemical constituents of Brazilian oat cultivars. This knowledge is essential for the utilization of this cereal in balanced diets, specially for individuals with high blood cholesterol, where the beta-glucans contribute to it's reduction. The analyzed genotipes were recommended by the Brazilian Oat Research Commission. The cultivars studied (CTC3, UFRGS7, UFRGS14, UPF7 and UPF16) showed high levels of protein (16.8%), lipids (6.84%) and beta-glucans (4.89%). The aminoacid profil of these samples was limiting only for lyisine, threonine and isoleucine. The other aminoacids had similar values to those recommended by the FAO. It was observed that all the studied variables suffered changes according to the interactions between genotype, locality and year of production. Cultivars UFRGS14, UFRGS7 and UPF16 were differentiated for their high contents of protein, lipids and beta-glucans, respectively

Estudo comparativo de cultivares de aveia (Avena sativa L. ) do sul do Brasil: efeito da morfologia do grão no rendimento industrial / Comparative studies of oat cultivars from Southern Brazil: effect of grain morphology on industrial yield

The purpose of this work was to study the effect of grain morphology of oats on their industrial yield. The five cultivars studied: CTC3, UFRGS7, UFRGS14, UPF7 and UPF16 were grown in three localities with different soil and climate conditions, for two consecutive years. The parameters evaluated in the oat samples before and after dehulling were grain size and shape (by image analysis), comparing them to industrial yield, weight of a thousand kernels and hectoliter weight. The results showed that image analysis of oat samples (with hulls), does not have any relation to industrial yield, different from what was observed with groat samples (dehulled). Industrial yield varied according to genotype, locality and year, while area, minimum and maximum diameters and grain shape were only affected by the genetic factor. It was observed that longer grains (UPF16) had the highest industrial yield, differently to rounder and shorter grains (UFRGS14) which had a lower yield due to the ease of breakage during hulling; the smallest grains also gave a low industrial yield