Solanum tuberosum L., commonly known as potatoes, comes as the fourth major staple crop after wheat, rice, and corn, and it is classified as both a grain and a vegetable. Potato flour produced from potato tuber is rich in starch, potassium, dietary fibers, and polyphenols, but is short of fat (Ahmed et al., 2018). The potato flour comprises 55.98%-72.71% starch, 5.46% amylopectin, and 10.32% protein, high content of essential amino acids, especially lysine, threonine, and tryptophan (Bao et al., 2021). A high content of lysine is very attractive for the production of staple food, because it makes up for the defects of rice and wheat in the production of staple food.
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