Characterization of sugary-1 (su-1) sugary enhancer (se) Kernels in Segregating Sweet Corn Populations

in Journal of the American Society for Horticultural Science
Authors:
Don R. La BonteDepartment of Horticulture, University of Illinois, Urbana, IL 61801

Search for other papers by Don R. La Bonte in
ASHS
Google Scholar
PubMed
Close
and
John A. JuvikDepartment of Horticulture, University of Illinois, Urbana, IL 61801

Search for other papers by John A. Juvik in
ASHS
Google Scholar
PubMed
Close

A single-kernel, sugar analysis technique was used to study the genetic relationship between morphological and metabolic traits previously associated with expression of the sugary enhancer (se) endosperm mutation in a su-1 sweet corn (Zea mays L.) background. Analysis of sucrose and total carotene content in su-1 kernel populations segregating for se showed that light-yellow kernel color was a reliable phenotypic indicator for kernels homozygous for the se gene. High levels of kernel maltose was not always indicative of su-1 se kernels in mature (55 days after pollination) kernel populations. Characteristic high levels of percent moisture in su-1 se kernels at 28 and 35 days post-pollination were identified as an expression of high sugar content. Kernels homozygous for su-1 se were also found to weigh less at maturity than su-1 Se kernels, and se was found to be partially expressed in a heterozygous condition.

  • Collapse
  • Expand