The relationship between the fine structure of original starch, leached starch during cooking, and the adhesiveness of noodles prepared by adding starches separated from different wheat cultivars was analyzed. The adhesiveness of noodles was primarily determined by the chain-length distributions of amylopectin rather than amylose. The adhesiveness of cooked noodles was positively correlated with the amount of short amylopectin chains with the degree of polymerization (DP) of 6-12, but negatively correlated with the amount of long chains with 25 < DP ≤ 36. The decrease of the proportion of short amylopectin chains and amylose chains and the increase of the amount of very long amylopectin chains with 37 < DP ≤ 100 in leachate led to decreased adhesiveness of cooked noodles. The reduction of the short-chain content in leached amylopectin caused by the increased proportion of long chains in original amylopectin is proposed to weaken the adhesiveness of cooked noodles.
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