The proximate composition, total phenolics, antioxidant activity, minerals, and trace elements were determined in 42 barley landraces in order to highlight their nutritional potential and promote their cultivation. Two-row barley landraces had a higher average content of starch, protein, total phenolic compounds, and iron, when compared with six-row ones that presented higher mean ash and fiber concentrations. Additionally, the six-row barley landraces with strongly pigmented grains had lower zinc and manganese and higher protein mean concentrations than the whitish or lightly pigmented barley landraces. Factor analysis and linear discriminant analysis were used to correctly differentiate samples according to type of barley (landrace or commercial) and number of rows. In general, all the parameters varied considerably among the barley landraces analyzed, but some barley landraces could be emphasized according to fiber, minerals, and phenolic antioxidants. There were important differences in the mean values in all the chemical parameters according to the island of origin of the barley grains. The application of linear discriminant analysis was also a useful tool to differentiate all the barley landraces with six rows according to the island of origin. PRACTICAL APPLICATION: Barley is a versatile cereal that can be used for human and animal feed, brewing, and as biodiesel. From the nutritional point of view, barley is rich in starch, protein, dietary fiber and minerals, as well as antioxidant compounds and vitamins. The landraces analyzed in this study have remained intact for the last 900 years, which gives opportunity to genome of these barley landraces to evolve some very specific traits. The physicochemical characterization of these local landraces carried out by us could be very useful as a source of new quality in breeding programs.

中文翻译：

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来自加那利群岛的大麦粒 (Hordeum vulgare L.) 地方品种的化学成分

测定了 42 种大麦地方品种的近似组成、总酚类物质、抗氧化活性、矿物质和微量元素，以突出其营养潜力并促进其栽培。与平均灰分和纤维浓度较高的六行大麦相比，两行大麦地方品种的淀粉、蛋白质、总酚类化合物和铁的平均含量更高。此外，与发白或浅色大麦地方品种相比，具有强烈色素颗粒的六行大麦地方品种具有较低的锌和锰以及较高的蛋白质平均浓度。因子分析和线性判别分析用于根据大麦类型（地方大麦或商业大麦）和行数正确区分样品。一般来说，所分析的大麦地方品种的所有参数差异很大，但根据纤维、矿物质和酚类抗氧化剂，可以强调一些大麦地方品种。根据大麦谷物的原产地岛，所有化学参数的平均值存在重要差异。线性判别分析的应用也是根据原产岛区分所有六行大麦地方品种的有用工具。实际应用：大麦是一种用途广泛的谷物，可用于人类和动物饲料、酿造和生物柴油。从营养的角度来看，大麦富含淀粉、蛋白质、膳食纤维和矿物质，以及抗氧化化合物和维生素。本研究中分析的地方品种在过去的 900 年中一直完好无损，这为这些大麦地方品种的基因组提供了进化一些非常具体的特征的机会。我们对这些当地地方品种进行的理化表征可以作为育种计划中新质量的来源非常有用。