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Article
Thermal Properties and Paste and Gel Behaviors of Starches Recovered from Accessions Used in the Germplasm Enhancement of Maize Project
Cereal Chemistry
  • S.K. Singh, Iowa State University
  • L. A. Jonhson, Iowa State University
  • Pamela J. White, Iowa State University
  • Jay-Lin Jane, Iowa State University
  • Linda M. Pollak, United States Department of Agriculture
Document Type
Article
Publication Version
Published Version
Publication Date
5-1-2001
DOI
10.1094/CCHEM.2001.78.3.315
Abstract
The objective of this study was to screen starches recovered from the corn accessions used in the Germplasm Enhancement of Maize (GEM) project for unusual thermal properties and paste and gel behaviors, so that they could be exploited in corn breeding programs to enhance traits important to corn utilization. In general, the values for gelatinization temperatures and peak height indices were greater, but heat of gelatinization values were less for the starches recovered from the GEM accessions (particularly BRA 052051 (SE 32)) than for starches from commercial Dent corn hybrids (11.3 vs. 13.6 J/g). Generally, retrogradation properties were similar among the GEM accessions, although there were specific accessions (particularly Lima 13) that possessed modestly lower percentage retrogradation (34 vs. 42%). Generally, peak viscosities, cold paste viscosities, and viscosity breakdowns were greater for the starches of the GEM accessions (particularly ARZM 01150, Antiqua 3, and URZM 01089, respectively) than for the starches of commercial hybrids. Pasting temperatures were about the same for all starches. Both 1-day and 7-day gel strengths were considerably greater for the starches recovered from the GEM accessions (particularly BRA 052051 (SE 32), 21.0 g for 1-day and FS8A(T), 66.2 g for 7-day). Although the differences in starch properties were statistically different, only the higher gel strengths of the starches recovered from the GEM accessions were of practical significance to the starch industry.
Comments

This article is from Cereal Chemistry, 2001, 78(3); 315-321. DOI: http://dx.doi.org/10.1094/CCHEM.2001.78.3.315.

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Citation Information
S.K. Singh, L. A. Jonhson, Pamela J. White, Jay-Lin Jane, et al.. "Thermal Properties and Paste and Gel Behaviors of Starches Recovered from Accessions Used in the Germplasm Enhancement of Maize Project" Cereal Chemistry Vol. 78 Iss. 3 (2001) p. 315 - 321
Available at: http://works.bepress.com/pamela_white/35/