Isolation of single-copy-sequence clones from a yeast artificial chromosome library of randomly-sheared Arabidopsis thaliana DNA

Plant Mol Biol. 1990 Apr;14(4):561-8. doi: 10.1007/BF00027501.


We describe the construction of a yeast artificial chromosome (YAC) library from the Arabidopsis thaliana genome. Randomly sheared high molecular weight source DNA was extracted from frozen, ground leaf tissue and blunt-end-ligated to the vector pYAC3. By size-fractionating the ligation products, we achieved an average clone size of 150 kb. Approximately 6% of the YACs contained inserts from the chloroplast genome. We screened clones equivalent to greater than four A. thaliana haploid nuclear genomes and isolated YACs homologous to five single-copy-sequence probes. The library should be useful for chromosome walking and genome mapping experiments. In addition, the approach used for its construction should be applicable to other higher plant species.

MeSH terms

  • Chromosomes
  • Cloning, Molecular
  • DNA / genetics*
  • DNA / isolation & purification
  • Gene Library
  • Genetic Vectors
  • Plants / genetics*
  • Saccharomyces cerevisiae / genetics*


  • DNA