Application of characteristic peptide fragment of Dioscorin protein of Chinese yam in aspect of identifying authenticity of Chinese yam product

The invention relates to application of a characteristic peptide fragment of Chinese yam Dioscorin protein in identification of authenticity of Chinese yam products, and belongs to the field of food detection, and the sequence of the characteristic peptide fragment is QAVNENAMNNA. The application method comprises the following steps: detecting whether a sample contains the characteristic peptide fragment or not; if the sample contains the characteristic peptide fragment, determining that the sample contains Chinese yam; and if the sample does not contain the characteristic peptide fragment, judging that the sample does not contain the Chinese yam. The detection method for the Dioscorin protein content of the Chinese yam, provided by the invention, has strong specificity, and the Dioscorin protein of the Chinese yam can be distinguished from cassava protein, colocasia esculenta protein, potato protein and corn protein. 本发明涉及山药Dioscorin蛋白的特征肽段在鉴别山药产品真实性方面的应用，属于食品检测领域，所述特征肽段的序列为：QAVNENAMNNA。所述应用方法为检测样品中是否含有所述的特征