The cultivation of sweet sorghum (Sorghum bicolor (L.) Moench) for bioethanol production is receiving global attention due to the plant's sugar‐rich stalk juice, which can be fermented directly to ethanol. One of the important steps toward the development of a superior sweet sorghum cultivar is proper assessment of bioethanol‐related traits in different environments. This study was conducted to characterize global sweet sorghum accessions for bioethanol yield and related traits. To do this and to obtain a final cultivar suitable for efficient bioethanol production, two different environments were chosen to select for the characteristics studied. In total, 53 genotypes, which were selected from 551 accessions and nine cultivars, were evaluated in two contrasting environments and two consecutive years (2014–2015). The results revealed wide variability among the genotypes for the traits investigated. In all the growing years and locations, the highest values for the extractable stalk juice yield, bioethanol yield, and juice Brix content were recorded for BSS55 (22 740 L ha⁻¹), BSS46 (1569.6 L ha⁻¹), and BSS67 (15.63 °Bx), respectively. The genotypes that originated from the USA showed some of the highest values for bioethanol yield and related traits. Positive and very high correlations were observed between the bioethanol yield and extractable stalk juice yield (r = 0.861**) and fructose and glucose concentration (r = 0.856**). The knowledge obtained in this investigation about the variation in the bioethanol yield and related traits led to potential genotypes that can be used in sweet sorghum breeding programs for bioenergy production. © 2020 Society of Industrial Chemistry and John Wiley & Sons Ltd

中文翻译：

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甜高粱基因型对生物乙醇产量及相关性状的评价

甜高粱（高粱）的栽培。（L.）Moench）用于生产生物乙醇的植物因其富含糖的秸秆汁而受到了全球关注，该汁可以直接发酵成乙醇。开发优质甜高粱品种的重要步骤之一是正确评估不同环境中与生物乙醇相关的性状。进行这项研究来表征全球甜高粱的生物乙醇产量及其相关性状。为此，为了获得适合高效生物乙醇生产的最终品种，选择了两种不同的环境来选择所研究的特性。在两个截然不同的环境和连续两年（2014-2015年）中，总共评估了从551个种质和9个品种中选择的53个基因型。结果表明，所研究性状的基因型之间存在很大差异。在所有生长年份和地点，BSS55（22 740 L ha^-1），BSS46（1569.6 L ha ^-1）和BSS67（15.63°Bx）。源自美国的基因型显示出生物乙醇产量和相关性状的某些最高值。在生物乙醇产量和可提取茎汁产量（r = 0.861 **）与果糖和葡萄糖浓度（r = 0.856 **）之间观察到正相关性，并且具有很高的正相关性。在这项调查中获得的有关生物乙醇产量和相关性状变化的知识，导致了潜在的基因型，可用于甜高粱育种计划中以生产生物能源。©2020工业化学学会和John Wiley＆Sons Ltd