The Brazilian savanna has the potential to support the national demand for barley providing an opportunity to the agricultural business in the region. The barley breeding program of Embrapa Cerrados pursues the selection of superior genotypes, adapted to the savanna conditions, with industrial quality and high grain yields. This work sought to characterise and quantify the genetic variability of 38 elite genotypes of irrigated barley in the Brazilian savanna from industrial grade traits, verifying the degree of association between quality characters and analysing the genetic distance from the ideotype. Twelve traits of malting quality were evaluated in two environments of the Distrito Federal. A descriptive analysis of the data was performed, the genetic dissimilarity coefficients were estimated between each genotype pair based on the Mean Euclidean Distance, the genotype‐ideotype distance index, the Pearson correlation and the relative contribution of each trait to Singh's genetic diversity of evaluated traits. There were dependency relationships between malting traits for the evaluated environments. Such associations facilitate the indirect selection of genotypes, increasing the efficiency of the breeding program. The use of selection indices allows the choice of promising genotypes that can be explored in blocks of crosses to maximise heterotic effects and genetic complementarity in the genetic breeding program of irrigated barley in the Brazilian savanna. © 2020 The Authors. Journal of the Institute of Brewing published by John Wiley & Sons Ltd on behalf of The Institute of Brewing & Distilling

中文翻译：

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基于麦芽质量的稀树草原环境中灌溉大麦的遗传变异

巴西大草原植物有潜力满足全国对大麦的需求，从而为该地区的农业业务提供机会。Embrapa Cerrados的大麦育种计划致力于选择优质基因型，以适应热带稀树草原条件，并具有工业品质和高谷物产量。这项工作试图从工业品级特征来表征和量化巴西热带稀树草原上灌溉大麦的38个精英基因型的遗传变异，验证质量特征之间的关联程度，并分析与表型的遗传距离。在Distrito Federal的两种环境中评估了麦芽品质的12个特征。对数据进行了描述性分析，基于平均欧氏距离，基因型-意识型距离指数，皮尔逊相关性以及每个性状对辛格遗传多样性的贡献来估算每个基因型对之间的遗传不相似系数。在所评估环境的麦芽特性之间存在依赖关系。这样的关联促进了基因型的间接选择，提高了育种程序的效率。选择指数的使用允许选择有前途的基因型，可以在杂交的区块中进行探索，以最大程度提高巴​​西大草原灌溉大麦的遗传育种程序的杂种效应和遗传互补性。©2020作者。约翰·威利（John Wiley＆