The Present Study Was Supported By National Natural Science Foundation Of China

The genotypic differences of starch retrograded properties for waxy maize (fresh powder, mature powder and starch of mature waxy maize) among45waxy maize varietis come from Chinese waxy maize regional test and retrograded properties related with grain yield and Grain compositions were analyzed. Further, the differences among fresh powder, mature starch and mature were analyzed. The experiment was carried out in the experimental of Yangzhou University in2009-2010. The main results were as follows:1. The genotypic differences between the yield of fresh waxy maize kernel and retrograded properties of starchThe yield of fresh waxy maize kernel and retrograded properties of starch were significantly different among waxy maize varieties. The variation range for yield of fresh waxy maize kernel was3635.0-8282.9kg/hm2, the highest is Sida29and the minimum is Yuecainuo1. The variation range for percentage of retrogradation was24.1～54.1%, the highest is Suyunuo5and the minimum is Qyu130. The other physicochemical properties were significantly different among waxy maize varieties too. The correlation analysis showed Zn content had negatively correlation with enthalpy of retrogradation (correlation coefficient was-0.31*) and the other grain grain compositions had not singnificantly correlations. By using cluster analysis, Heshengnuol512and Shennuo062were regard as high yield and low percentage of retrogradation, FNH001and SNN-12were as high yield and high percentage of retrogradation.2. The genotypic differences between the yield of mature waxy maize kernel and retrograded properties of starchThe yield of mature waxy maize kernel and retrograded properties of starch were significantly different among waxy maize varieties. The variation range for yield of mature waxy maize kernel was3239.8～7014.1kg/hm2, the highest is Sanbeibainuo2and the minimum is Sunuo5780. The variation range for percentage of retrogradation was13.2～79.1%, the highest is Sunuo5780and the minimum is Yinnuo2. The other physciochemical properties were significantly different among waxy maize varieties too. The correlation analysis showed, singnificantly correlation between BV and percentage of retrogradation, IBC and and percentage of retrogradation, starch and percentage of retrogradation (correlation coefficient were-0.34*,-0.33*,0.34*, respectively). S, Ca and Na had singnificantly correlation with percentage of retrogradation,(correlation coefficient were-0.48**,-0.30*,0.31*, respectively). By using cluster analysis, Mingyunuo3, Yanhejing2005and FHN001were regard as high yield and low percentage of retrogradation, Yinnuo2were as high yield and high percentage of retrogradation.3. The genotypic differences between the yield of mature waxy maize starch and retrograded propertiesThe yield of mature starch and retrograded properties were significantly different among waxy maize varieties. The variation range for yield of mature starch was1927.1～4419.1kg/hm2, the highest is Sanbeibainuo4and the minimum is Sunuo5780. The variation range for percentage of retrogradation was32.5～82.5%, the highest is NQ08and the minimum is FNH001. The other physciochemical properties were significantly different among waxy maize varieties too. The correlation analysis showed that no singnificantly correlation between starch compositions and percentage of retrogradation, except for Fe. By using cluster analysis, Mingyunuo3and FNH001were regard as high yield and low percentage of retrogradation, NQ08and Xuenuo8were as high yield and high percentage of retrogradation.4. The differences among fresh powder, mature starch and mature powder on retrograded propertiesThe retrograded properties were significantly different among fresh powder, mature starch and mature powder. Mature powder had lower transformation temperatures, enthalpy of retrogradation, percentage of retrogradation than fresh powder. Mature powder had lower transformation temperatures, higher enthalpy of retrogradation, percentage of retrogradation than mature powder.