为探索不同肉色参薯（Dioscorea alata Linn.）品种（品系）的营养价值，收集了来自福建、广东、海南、江西、江苏、台湾、云南的15个参薯品种（品系），比较其块茎花色苷、营养成分和矿质元素含量，并采用相关性分析、熵权法、灰色关联度分析和K-means聚类分析对各品种（品系）进行评价。结果显示：紫色参薯的花色苷含量显著(P<0.05)高于白色参薯，其中，紫玉参薯（Ziyu Shenshu）的花色苷含量明显高于其他品种（品系）。各参薯品种（品系）的非淀粉多糖、淀粉、抗性淀粉、纤维素、粗蛋白质含量间无显著差异，含量分别为4.61~20.47、544.89~796.85、94.63~127.69、19.24~37.23和54.81~99.95 mg·g^-1。部分参薯品种（品系）的矿质元素含量存在显著差异，Na、Ca、Mg、Cu、Fe、Zn和Mn含量最高的品种（品系）分别为紫皮白肉脚板薯（Zipibairou Jiaobanshu）、抚州脚板薯（Fuzhou Jiaobanshu）、系马桩脚板薯（Ximazhuang Jiaobanshu）、‘阳明山山药’（‘Yangmingshan Yam’）、系马桩脚板薯、紫溪圆苕（Zixi Yuanshao）和海南杂紫（Hainan Zazi）。花色苷含量的变异系数最大（143.98%），非淀粉多糖含量、Zn含量和Mn含量的变异系数较大，分别为42.88%、46.98%和42.06%。相关性分析结果显示：13个指标间的相关性中有15对达显著水平，其中，花色苷含量与Zn含量呈显著负相关，与Mn含量呈极显著负相关(P<0.01)。供试15个参薯品种（品系）可分为5个Ⅰ级、10个Ⅱ级，其中，Ⅰ级品种（品系）为系马桩脚板薯、紫玉参薯、紫溪圆苕、抚州脚板薯和海南杂紫，综合营养价值较高。综合分析结果显示：花色苷含量差异是各参薯品种（品系）肉色不同的主要原因；Fe含量、非淀粉多糖含量、Mn含量、纤维素含量和Ca含量可作为评价参薯品质的关键指标；紫玉参薯可作为优良的食药保健产品开发原料。

To explore the nutritional value of different flesh-color cultivars (lines) of Dioscorea alata Linn., 15 D. alata cultivars (lines) were collected from Fujian, Guangdong, Hainan, Jiangxi, Jiangsu, Taiwan, and Yunnan， the contents of anthocyanin, nutritional components, and mineral elements in their tubers were compared, and the cultivars (lines) were evaluated by using correlation analysis, entropy weight method, grey relational analysis, and K-means cluster analysis. The results show that the anthocyanin contents of purple D. alata are significantly (P<0.05) higher than those of white D. alata, among which, the anthocyanin content of Ziyu Shenshu is obviously higher than that of the other cultivars (lines). There are no significant differences in contents of non-starch polysaccharide, starch, resistant starch, cellulose, and crude protein among the D. alata cultivars (lines), and the contents are 4.61-20.47, 544.89-796.85, 94.63-127.69, 19.24-37.23, and 54.81-99.95 mg·g^-1, respectively. There are significant differences in mineral element contents among some D. alata cultivars (lines), and the cultivars (lines) with the highest contents of Na, Ca, Mg, Cu, Fe, Zn, and Mn are Zipibairou Jiaobanshu, Fuzhou Jiaobanshu, Ximazhuang Jiaobanshu, ‘Yangmingshan Yam’, Ximazhuang Jiaobanshu, Zixi Yuanshao, and Hainan Zazi, respectively. The coefficient of variation of anthocyanin content is the largest (143.98%), that of non-starch polysaccharide content, Zn content, and Mn content are relatively large, which are 42.88%, 42.06%, and 41.85%, respectively. The correlation analysis result shows that among the 13 indexes, 15 pairs reach significant correlation levels, among which, anthocyanin content shows a significant negative correlation with Zn content and an extremely significant  negative correlation (P<0.01) with Mn content. The 15  D. alata cultivars (lines) tested can be classified into grade Ⅰ with 5 cultivars (lines) and grade Ⅱ with 10 cultivars (lines), among which, the grade Ⅰ cultivars (lines) are Ximazhuang Jiaobanshu, Ziyu Shenshu, Zixi Yuanshao, Fuzhou Jiaobanshu, and Hainan Zazi, which have relatively high comprehensive nutritional value. The comprehensive analysis result indicates that the difference in anthocyanin content is the main reason for the different flesh colors among the D. alata cultivars (lines); Fe content, non-starch polysaccharide content, Mn content, cellulose content, and Ca content can be used as key indexes for evaluating D. alata quality; Ziyu Shenshu can be used as a raw material for the development of excellent edible and medicinal health products.