Maize sugary enhancer1 (se1) is a gene affecting endosperm starch metabolism

  title={Maize sugary enhancer1 (se1) is a gene affecting endosperm starch metabolism},
  author={Xia Zhang and Karl Haro von Mogel and Vai S Lor and Candice N. Hirsch and Brian de Vries and Heidi Kaeppler and William F. Tracy and Shawn M. Kaeppler},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  pages={20776 - 20785}
Significance Maize sugary enhancer1 (se1) is a genetic modifier of su1 expression and is a commercially important allele that modifies kernel carbohydrate metabolism and improves fresh market quality. Carbohydrates, and primarily starch, are a major globally important product of cereal grains, but mechanisms affecting grain composition and genetic networks are not fully understood. In this study, we identify a gene that affects endosperm carbohydrate composition by modifying metabolism in a… Expand
11 Citations
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Sweet Corn Research around the World 2015–2020
This review is a summary of the sweet corn research published during the five years preceding 2021 that results in reduced starch content and increased sugar concentration when consumed fresh. Expand
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Starch structural and functional properties of this maize type with waxy and sugary double recessive genes are clarified using the two sweet-waxy maize hybrids of ATN and NKY as materials. Expand
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Characterization of sugary-1 (su-1) sugary enhancer (se) kernels in segregating sweet corn populations.
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 sugary enhancer (se) gene. Expand
Characterization of the maize gene sugary1, a determinant of starch composition in kernels.
Debr branching of glucopolysaccharides is seemingly part of the normal process of starch biosynthesis, and the final degree of branch linkages in starch most likely arises from the combined actions of branching and debranching enzymes. Expand
Molecular structure of three mutations at the maize sugary1 locus and their allele-specific phenotypic effects.
It is suggested that total DBE catalytic activity is the not the sole determinant of Su1 function and that specific interactions between SU1 and other components of the starch biosynthetic system are required. Expand
Analysis of Endosperm Sugars in a Sweet Corn Inbred (Illinois 677a) Which Contains the Sugary Enhancer (se) Gene and Comparison of se with Other Corn Genotypes.
The slow drying characteristic and the reduced starch content previously reported for maturing seeds of IL677a may be related to the maltose accumulation reported here. Expand
Coordinated Transcriptional Regulation of Storage Product Genes in the Maize Endosperm
It is demonstrated that expression of genes involved in starch and storage protein synthesis of the maize (Zea mays L.) endosperm are coordinated, and both are sensitive to mutationally induced differences. Expand
Spatiotemporal Profiling of Starch Biosynthesis and Degradation in the Developing Barley Grain1[W]
Gene expression patterns and enzyme activities suggest two different pathways for starch degradation in maternal tissues of developing grains, and the suite of genes involved in starch synthesis in filial starchy endosperm is much more complex than in pericarp and involves severalendosperm-specific genes. Expand
RFLP mapping of the sugary enhancer1 gene in maize
Data suggest that the sugary enhancer1 locus maps on the the distal portion of the long arm of chromosome 2 in the maize genome, in contrast to previous work where se1 was reported to be located on chromosome four. Expand
Recurrent Mutation and Genome Evolution: Example of Sugary1 and the Origin of Sweet Maize
It is determined that five independent mutations have been selected for su1 from 57 cultivars of su1 maize and three of these five alleles were single base pair changes at highly conserved sites and a fourth was a 1.3-kbp transposon. Expand
Allelic Analysis of the Maize amylose-extender Locus Suggests That Independent Genes Encode Starch-Branching Enzymes IIa and IIb
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