Campus Units

Agronomy, Food Science and Human Nutrition, Center for Crops Utilization Research

Document Type

Article

Publication Version

Published Version

Publication Date

11-2005

Journal or Book Title

Cereal Chemistry

Volume

82

Issue

6

First Page

683

Last Page

689

DOI

http://dx.doi.org/10.1094/CC-82-0683

Abstract

The effect of four growing environments (two at Ames, IA; one at Clinton, IL; and one at Columbia, MO) on the thermal properties of starch from five exotic-by-adapted corn inbred lines (Chis37, Cuba34, Cuba38, Dk8, Dk10) and two control lines (B73 and Mo17) were studied using differential scanning calorimetry (DSC). The variations in thermal properties within environments were similar for the exotic-by-adapted lines and control lines. Missouri was the warmest environment and generally produced starch with the greatest gelatinization onset temperature (ToG), the narrowest range of gelatinization (RG), and the greatest enthalpy of gelatinization (ΔHG). Illinois was the coolest environment and generally resulted in starch with the lowest ToG, widest RG, and lowest ΔHG. These differences were attributed to higher temperatures in Missouri during grain-filling months either increasing the amount of longer branches of amylopectin or perfecting amylopectin crystalline structure. The Ames 1 environment produced starch with thermal properties most similar to those of Illinois, whereas the Ames 2 environment produced starch with thermal properties most similar to those of Missouri. Ames 2, located near a river bottom where temperatures tend to be warmer, likely had temperatures most similar to those found in Missouri during grain filling.

Comments

This article is from Cereal Chemistry, 2005, 82(6); 683-689. http://dx.doi.org/10.1094/CC-82-0683.

Rights

Works produced by employees of the United States 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

Share

COinS