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Cereals pp 91-102 | Cite as

Developing Specialty Starches from New Crops

A Case Study Using Grain Amaranth
  • Harold Corke
  • Huaixiang Wu
  • Shaoxian Yue
  • Hongliang Sun
Chapter

Abstract

A wide range of variation was found in the properties tested among Amaranthus species and among genotypes within the same species. It was generally found that the amylose content of cultivated genotypes of Amaranthus was lower than that of non-cultivated genotypes; starch of cultivated genotypes had more stable pasting properties (i. e. higher peak viscosity, lower viscosity drop during shear thinning and lower retrogradation) than noncultivated genotypes; starch of cultivated genotypes had lower TP and higher ΔH than non-cultivated genotypes; the starch pastes of cultivated genotypes were stable during cold storage, i. e. hardness, cohesiveness and modulus of cultivated starch pastes were lower, and adhesiveness was higher, compared to non-cultivated genotypes. The values for pasting, functional, and thermal properties of Amaranthus starch were highly correlated, especially the pasting and functional properties. Amylose content was closely related to the physical and functional properties of Amaranthus starch. The environmental effect on the properties of Amaranthus starch was different for different species. Compared to the reference corn, rice, potato and wheat starches, Amaranthus starch tended to have more stable paste, i. e. lower shear thinning and lower retrogradation, and higher Tp and ΔH; Amaranthus starch paste was more resistant to cold storage. Generally, many Amaranthus starches would be good thickeners and stabilizers in food processing. The wide genetic diversity necessitates specific choices for specific uses.

Keywords

Amylose Content Potato Starch Rice Starch Wheat Starch Gelatinization Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Harold Corke
    • 1
  • Huaixiang Wu
    • 1
  • Shaoxian Yue
    • 2
  • Hongliang Sun
    • 2
  1. 1.Department of BotanyUniversity of Hong KongHong Kong
  2. 2.Institute of Crop Breeding and CultivationChinese Academy of Agricultural SciencesBeijingChina

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