Genetic and fine structure analysis of unc-26(IV) and adjacent regions in Caenorhabditis elegans

Mol Gen Genet. 1990 May;221(3):459-65. doi: 10.1007/BF00259412.

Abstract

The genetic organization of unc-26(IV) and adjacent regions was studied in Caenorhabditis elegans. We constructed a fine structure genetic map of unc-26(IV), a gene that affects locomotion and pharyngeal muscle movement but not muscle structure. Eleven alleles were positioned relative to each other recombinationally and were classified according to phenotypic severity. The unc-26 gene spans at least 0.026 map units, which is exceptionally large for a C. elegans gene. All but one allele, e205, are amorphic alleles. Interestingly, e205 is hypomorphic but also suppressible by the amber suppressor sup-7. Nineteen lethal mutations in the unc-26 region were isolated and characterized. The unc-26 region is subdivided into four zones by five deficiency breakpoints. These mutations fall into 15 complementation groups. The stages of development affected by these mutations were determined.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Animals
  • Caenorhabditis / genetics*
  • Chromosome Mapping
  • Genes*
  • Genes, Lethal
  • Genetic Complementation Test
  • Locomotion*
  • Mutation*
  • Phenotype
  • Recombination, Genetic