Then, these three sectorscompete for the same limited supply of raw materials. Recently,sweet sorghum has gained interest for its potential use in ethanol∗Corresponding author at: Department of Biotechnology, Faculty of Technology,Khon Kaen University, Khon Kaen 40002, Thailand.E-mail address: lakcha@kku.ac.th (L. Laopaiboon).production since its stems contain large amounts of fermentablesugars, i.e., sucrose, glucose and fructose, which can be directlyconverted into ethanol by Saccharomyces cerevisiae. Additionally,its yield is very high (20–30 dry tons ha−1), and it is relatively welladapted to diverse climates, drought and saline conditions (Wuet al., 2010; Chohnan et al., 2011; Regassa and Wortmann, 2014).