Improving Corn Grain Purity by Using Color-Sorting Technology
- A. Susana Goggi *a,
- Kamal M. Adamb,
- Higinio Sanchezc and
- Mark Westgated
- a Department of Agronomy, Iowa State University, 166 Seed Science Center, Ames 50011
b Iowa State University, 155 Seed Science Center, Ames 50011
c Department of Agronomy, Iowa State University, 166 Seed Science Center, Ames 50011; and
d Department of Agronomy, Iowa State University, 1577 Agronomy Hall, Ames 50011
Color sorting is often used to remove unwanted off-colored contaminants. The objectives of this study were to determine the usefulness of color sorting in removing adventitious corn from a seed lot and to evaluate the impact of contaminant color on efficacy. Seed lots of two contrasting colors were used in the experiments: yellow corn in a white lot and purple corn in a yellow lot. Samples were collected from three experimental sites: two white corn seed production fields surrounding a yellow pollen source, and a yellow corn seed production field surrounding a purple popcorn pollen source. Collected samples were color sorted in three successive passes. Outcross levels in the original nonsorted samples ranged from 0.10 to 38.55% in the yellow and white samples and from 0.61 to 45.78% in the purple and yellow samples. Color sorting reduced the percentage of outcross of yellow and purple kernels in the sample. The percentage of yellow seeds in white-seeded corn was reduced to 6.22% in samples collected at 3 ft and 0.01% at 820 ft from the source. The percentage of blue seeds in yellow-seeded corn samples was reduced to 0.58 at 0 ft and 0% at 270 ft from the source. These results indicate that color sorting is very effective at removing outcross seeds.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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