| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4503417 | Acta Agronomica Sinica | 2009 | 7 Pages |
Starch isolated from 8 Chinese waxy corn cultivars which sown in spring and autumn were evaluated for its crystalline structure and pasting properties using X-ray diffractometer and Rapid Visco Analyzer. All starch samples showed a typical A-type diffraction pattern, indicating that growing season had no effect on it. However, the starch crystallinity and pasting properties were affected significantly by growing season. Compared with starch from the spring-sown plants, that from autumn-sown plants showed higher values in crystallinity, peak intensities (2θ = 15°, 17°, 18°, 20°, and 23°), peak viscosity, trough viscosity, final viscosity, and breakdown; whereas the setback of starch was significantly lower. Genotypic difference was observed in crystallinity, peak intensity, and pasting characteristics. The crystallinity was positively correlated with the peak viscosity (r = 0.72, P < 0.01), breakdown (r = 0.85, P < 0.01), trough viscosity (r = 0.52, P < 0.05), and pasting temperature (r = 0.55, P < 0.05), but negatively correlated with setback (r = −0.49, P < 0.05). The differences of pasting properties between the growing seasons were mainly resulted from the changes of crystallinity and peak intensity of starch in waxy corn.
