For the development of saturated linkage maps of plants, it is necessa
ry to get as many informative probes as possible. By using, the methyl
ation sensitive restriction enzyme PstI, we developed a library of sin
gle/low-copy DNA sequences of rye. A total of 180 clones were selected
, 12 sequences were located on rye and wheat chromosomes and two of th
em were mapped with respect to known RFLP markers on chromosomes 5R an
d 7R.