It is of great significance for selecting the elite yam varieties with high productivity and starch content, good-tasted and wide adaptability, which is also beneficial to our country's grain safety and increasing of peasants' income. Meanwhile, the structure and properties of yam starch could also affect the taste of yam and the starch processing industry. Four newly cultivated varieties, namely, Guihuai 5, 7, 8 and purple yam, were used to study the different structures and properties of each variety. The different starch composition, granula...