opaque-15, A maize mutation with properties of a defective opaque-2 modifier

Joanne M. Dannenhoffer, Dwight E. Bostwick, Etti Or, Brian A. Larkins

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25 Scopus citations


An opaque mutation was identified that reduces γ-zein synthesis in maize endosperm. The mutation, opaque-15, causes a 2- to 3-fold reduction in γ- zein mRNA and protein synthesis and reduces the proportion of the 27-kDa γ- zein A gene transcript. Although the protein bodies in opaque-15 are similar in size and morphology compared to wild type, there are fewer of them in developing endosperm cells. The opaque-15 mutation maps near the telomere of chromosome 7L, coincident with an opaque-2 modifier locus. Based on its phenotype, opaque-15 appears to be a mutation of an opaque-2 modifier gene.

Original languageEnglish
Pages (from-to)1931-1935
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number6
StatePublished - Mar 14 1995


  • Quality Protein Maize
  • storage proteins
  • γ-zein


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