Mapping of 25 drought-inducible genes, RD and ERD, in Arabidopsis thaliana

We mapped 25 Arabidopsis thaliana drought-inducible genes, Responsive to De hydration (RD) and Early Responsive to Dehydration (ERD), to the Arabidopsi s genome and compared map positions with those of mutants that show environ mental stress response. We hybridized CIC yeast artificial chromosome (YAC) library filters with the cDNAs and determined the map positions of 18 corr esponding genes. We screened the P1 library with 7 other clones and analyze d segregation of their restriction fragment length polymorphisms (RFLP) in recombinant inbred (RT) lines. One cDNA could be mapped because it had been sequenced by the Arabidopsis genome sequencing program.