Abstract
AbstractOur goal was to improve sweet corn (Zea mays L.) by the novel approach of combining three grain mutants in one plant, shrunken‐2 (sh2sh2), purple (Pr1Pr1C1C1), and opaque‐2 (o2o2), for increased sugar, anthocyanin, and tryptophan content, respectively. We crossed purple opaque‐2 waxy maize with sweet corn inbred lines. In the segregating selfed progenies, the opaque‐2 gene was detected by the genetic marker phi057, the two other genes by the visual markers purple and shrunken. The purple opaque‐2 sweet corn performed well in field tests; it had high total sugar content as required for sweet corn, improved protein quality indicated by 30% higher tryptophan content, and a 10‐fold higher anthocyanin content than yellow kernel maize. This new sweet corn germplasm is a first step toward developing specialty maize with increased health benefits.
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