西藏二棱青稞与六棱青稞品质差异分析

Analysis of Quality Difference Between Two and Six-rowed Highland Barley in Tibet

为进一步了解二棱和六棱青稞之间是否存在品质差异性,本试验通过对二、六棱青稞的品质指标进行比较分析,发现参试的青稞品种(系)中,蛋白质含量除QTB23比藏青2000低2.5%外,其余二棱青稞蛋白质的含量均高于六棱青稞;藏青2000与QTB13的脂肪含量无显著区别,但是极显著高于QTB17、QTB23、QTB25青稞品系;参试品种(系)间粗纤维、β-葡聚糖和总黄酮含量几乎无显著差异;在微量元素含量方面,二棱青稞品系QTB13、QTB16的含量显著高于六棱青稞和其他二棱青稞品系,六棱青稞品种的钠、钾含量显著高于二棱青稞,镁、磷、钙含量品种间差异不大。QTB13中Vc和γ-氨基丁酸(GABA)含量最高,分别为5.34、54.7 mg/100g。通过分析发现,二棱青稞品系在基本营养品质及功能性因子含量方面均比较突出,说明在功能性产品开发方面二棱青稞较六棱青稞具有优势,这对于二棱青稞的进一步开发极具潜力。

In order to further understand whether there is quality difference between two-rowed barley and six-rowed barley by comparison and analysis of the quality indexes,it was found that the protein content of the two-rowed highland barley varieties(lines)was higher than that of the six-rowed highland barley,except that QTB23 was 2.5%lower than zangqing 2000.Fat content of zangqing 2000 was not significantly different from QTB13,but significantly higher than QTB17,QTB23 and QTB25.There was no significant difference in the content of crude fiber,beta-glucan and total flavonoids among the tested varieties.In terms of the content of trace elements,the contents of two-rowed highland barley QTB13 and QTB16 are significantly higher than those of six-rowed highland barley and other two-rowed highland barley,the contents of sodium and potassium of six-rowed highland barley are significantly higher than that of two-rowed highland barley,and there is little difference between varieties in the contents of magnesium,phosphorus and calcium.QTB13 with the highest content of Vc and gamma-aminobutyric acid(GABA)which is 5.34 and 54.7 mg/100 g,respectively.According to analysis,two-rowed highland barley strains are prominent in basic nutritional quality and content of functional factor aspects,indicating that two-rowed highland barley has advantages over sixrowed highland barley in product development,which is extremely potential for the further development of two-rowed highland barley.