七种彩色马铃薯的蛋白质营养评价

Evaluation of the protein nutritional value of seven color potatoes

为评价彩色马铃薯的蛋白质营养价值,以7个品种/品系的彩色马铃薯及2个普通品种马铃薯为材料,应用凯氏定氮法、全自动氨基酸分析仪法测定蛋白质含量和氨基酸组成,并使用模糊识别法、氨基酸比值系数(RC)、氨基酸比值系数分(SRC)、必需氨基酸指数(EAAI)和营养指数(NI)评价它们的蛋白质营养.结果表明:7个品种/品系的彩色马铃薯的蛋白质营养差异较大,干粉蛋白质含量范围为6.68%~12.96%,必需氨基酸占氨基酸总量的质量分数比例为28.71%~39.96%;部分彩色马铃薯蛋白质营养较一些普通马铃薯高,其中永康紫洋芋和375-19的蛋白质营养价值明显优于其他彩色马铃薯,是值得培育的品种/品系.实验提示彩色马铃薯具有较高的蛋白质营养价值和广阔的开发前景,也为彩色马铃薯品种的选育及资源的合理利用提供基础.

In order to evaluate the protein nutritional value of color potatoes,seven varieties or strains of color potatoes and two ordinary varieties potatoes were used as experimental samples.The protein content and amino acid composition were determined by Kjeldahl method and automatic amino acid analyzer.Their protein nutrition were evaluated by fuzzy recognition,ratio of amino acid coefficient(RC),score of RC(SRC),essential amino acid index(EAAI),and nutritional index(NI).The results showed that the protein nutrition were different greatly in different color potatoes.The total protein content of the dry powder ranged from 6.68%to 12.96%,and the proportion of essential amino acids in the total mass of amino acids ranged from 28.71%~39.96%.A part of color potatoes protein nutrition was higher than some ordinary varieties potatoes.Yongkang purple potato and 375-19 was significantly better than other color potatoes,which indicated that it was worthy to be cultivated.Based on the experiment results,it was suggested that colored potato had high protein nutritional value and broad development prospects,and also provided a basis for the breeding of colored potato varieties and the rational use of resources.