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Article
Effect of Planting Date on Maize Starch Thermal Properties.
Cereal Chemistry
  • M. R. Campbell, Iowa State University
  • Linda M. Pollak, United States Department of Agriculture
  • Pamela J. White, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-1994
Abstract

Starches isolated from kernels of two maize (Zea mays L.) inbreds and their F1 progeny, grown after four planting dates, were evaluated for differences in thermal properties. Differential scanning calorimetry (DSC) was used to compare onset (To) and peak (Tp) temperature, range (Rn), and total enthalpy ((Delta)H) values of gelatinization. Amylose content (%AM) of samples was determined colorimetrically, and image analysis was used to determine average diameters of granules. Significant (P less than or equal to 0.05) increases for Tp and (Delta)H were observed with later planting dates. Significant genotypic differences also were seen for To, Tp, and (Delta)H. Later planting dates had no effect on %AM or starch granule size. Genotypes ranked similarly for %AM across each environment, and no differences were observed for average granule diameter. The presence of environmental effects on thermal properties of the starch suggests that if small differences (1-2 C or less than 0.2-0.3 cal/g) are to be identified among nonmutant genotypes, growing conditions may need to be controlled.

Comments

This article is from Cereal Chemisty, 1994, 71(6); 556-559.

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
M. R. Campbell, Linda M. Pollak and Pamela J. White. "Effect of Planting Date on Maize Starch Thermal Properties." Cereal Chemistry Vol. 71 Iss. 6 (1994) p. 556 - 559
Available at: http://works.bepress.com/pamela_white/48/