Mizuho Taniguti, Risa Aiuchi, J. Niwa, M. Yamamori, S. Fujita
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Contents and Heat-moisture Treatment Effect of Resistant Starch in High Amylose Wheat Starch
We determined the resistant starch (RS) content of high amylose wheat (HAW) which was recently crossbred in Japan. By the crossbreeding, the endosperm starch content of HAW was decreased about 20% in comparison with that of normal wheat. HAW contained 1.3% of RS in the starch, and the content was six times higher than that of normal wheat starch. After heat-moisture treatment the RS content of normal wheat and HAW starch were 0.5 and 2.7%, respectively. The RS content of HAW was doubled of untreated one. In case of corn starch after heat-moisture treatment, the RS content of two type of high amylose corn, HAC and A632 increased to 26.2% and 2.7%, respectively. The RS of normal corn starch was scarcely contained. From the results, the heat-moisture treatment may be able to increase the RS content of wheat, although the treatment of wheat starch was not effective as that of corn starch.
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