Study on Yield and Starch Gelatinization Characteristics of Different Sweet Potato Varieties

doi:10.11924/j.issn.1000-6850.2013-1653

Abstract

Abstract: The aim was to compare and study the difference and correlation of these sweet potato varieties among yield, dry matter, starch matter and starch gelatinization characteristics systematically. In field experiments, the yield, dry matter and starch matter of thirty- one sweet potato varieties widely planted in China were studied. The Rapid Visco- Analyzer (RVA) was used to determine the starch gelatinization characteristics of these cultivars. The results showed that the fresh weight per plant of‘Nanshu88’was the highest, reaching 1.56 kg/plant. The ranges of dry matter and starch matter were 20.57%-40.87%, 11.54%- 29.13% , respectively. Fresh yield of‘Nanshu88’was the highest, reaching 78065.61 kg/hm², followed by‘Taizzhong10’, 63325.17 kg/hm². Differences were found among RVA profiles in different varieties of sweet potato, especially the final viscosity and the setback of starch viscosity characteristics. The correlation analysis showed positive relationships between peak viscosity and final viscosity, peak viscosity and setback, trough viscosity and final viscosity, trough viscosity and setback, final viscosity and setback, and negative correlations between the pasting temperature and each starch RVA profiles characteristics (except peak time).

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