The Study of Correlation Between the Physicochemical Properties of Starch From Different Sweet Potato Varieties and the Quality of Its Starch Noodle

In order to investigate the relationship between the physicochemical property of starch from different sweet potato varieties and the quality of its starch noodle. This paper studied the chemical composition and physicochemical properties of starches from four varieties of starch-type sweet potato( ‘Luxuan 1',‘Xushu 22',‘Jishu 65'and ‘Jishu98'),and analyzed the correlation between starch composition,physicochemical properties and quality of starch noodle. The result showed that the different composition of starch led to different physicochemical properties of starch and starch noodle quality. The result of correlation analysis showed that the amylose and lipid content,setback viscosity,pasting temperature,peak time,swelling power and retrogradtion degree were positive correlated with starch noodle quality,but conclusion viscosity,solubility and particle size were negatively correlated with starch noodle quality.Combined with the result of correlation analysis found that the quality of ‘Luxuan 1'starch noodle was better than other three varieties. Therefore,this study made fundamental knowledge for the selection of starch and cultivation of sweet potato varieties special for starch noodle production.