Identification and chromosomal location of a new tandemly repeated DNA in maize

Two clones of a new family of tandemly repeated DNA sequences have been iso lated from a maize random genomic DNA library. MR68 is 410 bp, representing a monomeric unit and MR77 is 1222 bp, containing three units. The copy num ber was estimated to be about 3000 per 1C maize genome. Its methylation pat tern was also determined. Fluorescent in situ hybridization (FISH) indicate s that the sequence is located on the subtelomeric region of the long arm o f chromosomes 3 and 6, as well as on the satellite of chromosome 6.