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United States Department of Agriculture

Agricultural Research Service

Title: Variation in Value-Added Properties of Gem Material

Authors
item Singh, S - ISU
item Johnson, L - ISU
item Hurburgh, C - ISU
item White, P - ISU
item Pollak, Linda

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: September 14, 1996
Publication Date: N/A

Technical Abstract: Fifty-three Latin American (LA) accessions, two commercial dent corn hybrids and two inbreds were evaluated for their compositions, physical properties, wet-milling characteristics and functional properties of starches recovered from them. Kernels of the LA accessions had a wide range in starch content (70.9 to 75.1% versus 73.3% for commercial dent hybrids). Absolute densities were consistently higher for the LA accessions (1.32 versus 1.29 g/cc). The wet-milling properties of the LA accessions were not nearly as good as the commercial dent corn hybrids (starch yields averaged only 54.4% for the LA accessions versus 64.8% db for the commercial dent hybrids). Gluten yields were much greater for the LA accessions than for the commercial dent hybrid, due to starch in the gluten fraction increasing starch loss and reducing the protein content of the gluten. Occasionally, high fiber yields were also obtained for the LA accessions indicating that the starch did not separate well from the fiber. There are considerable differences in starch properties among the LA accessions that may be worth exploiting. On the average, starches from LA accessions gelatinized at lower temperatures (70.0 versus 71.3 deg C) and over narrower ranges (7.9 versus 10.5 deg C) than did the starches from the commercial dent hybrids.

Last Modified: 4/19/2014
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