Abstract
Sweet sorghum is a special purpose sorghum with a sugar-rich stalk, almost like sugarcane. The objective of this work was to evaluate the phenotypic stability and adaptability of sweet sorghum genotypes, in different Brazilian regions, for the production of bioethanol. Twenty-five sweet sorghum genotypes were evaluated in 10 environments distributed in the Southeast, Midwest, Northeast, and Southern regions of Brazil. The experimental design was a randomized complete block design with three repetitions. The following agroindustrial traits were evaluated: fresh biomass yield (FBY), total soluble solids content (TSS) and tons of Brix per hectare (TBH). The adaptability and stability analyzes were performed with the methods GGEbiplot and Annicchiarico methodologies. The Annicchiarico and GGEbiplot adaptability and stability study methods presented satisfactory and consistent results and can be used separately or together in sweet sorghum breeding programs, and B005 and B008 sweet sorghum genotypes presented superior performance, with similar classification in both methods studied.
Highlights
The global demand for petroleum fuel and its associated environmental concerns, such as greenhouse gas emissions, increases the use of renewable crops for the production of bioenergy (Appiah-Nkansah, Li, Rooney, & Wang, 2019)
Among the renewable energy sources, biofuels, especially ethanol produced by fermenting carbohydrates-rich crops, have gained prominence in the world energy market (Leite et al, 2019)
Several countries have started their own programs for the production and use of ethanol as fuel to reduce oil dependence and greenhouse gas emissions
Summary
The global demand for petroleum fuel and its associated environmental concerns, such as greenhouse gas emissions, increases the use of renewable crops for the production of bioenergy (Appiah-Nkansah, Li, Rooney, & Wang, 2019). Among the renewable energy sources, biofuels, especially ethanol produced by fermenting carbohydrates-rich crops, have gained prominence in the world energy market (Leite et al, 2019). Brazil is the second-biggest producer of ethanol in the world, second only to the USA (Renewable Fuels Association [RFA], 2019). The use of ethanol as biofuel in Brazil has been the most successful program to replace fossil fuels worldwide. Several countries have started their own programs for the production and use of ethanol as fuel to reduce oil dependence and greenhouse gas emissions. The Brazil still needs to sustain production growth in the ethanol sector in order to meet increasing domestic demand and maintain its export share
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