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Laboratory comparisons of poly phenols and their repellent characteristics in bird resistant sorghum sorghum bicolor grains

Laboratory comparisons of poly phenols and their repellent characteristics in bird resistant sorghum sorghum bicolor grains

Journal of Agricultural & Food Chemistry 28(5): 1006-1011

Laboratory evaluations of repellency and polyphenol composition were conducted for 15 varieties of bird-resistant (BR) sorghums. Tests involved the weaver finch (Quelea quelea) and the red-winged blackbird (Agelaius phoeniceus). BR varieties were compared with a bird-susceptible (Martin X) sorghum by using a 2-choice paired preference test under light and reduced lighting (near darkness) conditions. The most important observation of this study was recognition of the diversity of polyphenolic properties among BR sorghums. The 15 varieties were separated into 3 groups (7 least, 7 intermediate, and one most preferred) based on preference response. In most instances, polyphenol values from modified vanillin-HCl and Sephadex LH-20 gel permeation chromatography analyses of these varieties could be placed in similar groups. The 7 least preferred sorghums, with the exception of WGF, were uniform in polyphenol properties whereas substantial variation occurred among the remaining 8 varieties. Several observations involving test conditions, bird species and sorghum properties were also discussed.

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Accession: 005787571

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