Scientists from the University of Copenhagen (Denmark) report a study on the variation of sugar yields due to genotypic qualities of wheat feedstock during the processing to cellulose ethanol under pilot-plant conditions. Five different wheat cultivars undergoing pilot-scale pretreatment/saccharification were compared in terms of sugar yield and response to enzyme loadings and particle-size distribution. The results of their study confirmed that the optimum parameters for biomass processing to cellulose ethanol can be highly dependent on the cultivar. They found that the effect of cultivar (depending on experimental conditions), was either highly significant or the interaction between cultivar and enzyme loading was significant. Thus, in the breeding of potential feedstocks for biofuel ethanol production, the "processability" of the feedstock to fermentable sugars may be an important consideration. The full paper is published in the open-access journal, Biotechnology for Biofuels.