A whole-genome radiation hybrid (RH) panel was used to construct a high-res
olution map of the rat genome based on microsatellite and gene markers. The
se include 3,019 new microsatellite markers described here for the first ti
me and 1,714 microsatellite markers with known genetic locations, allowing
comparison and integration of maps from different sources. A robust RH fram
ework map containing 1,030 positions ordered with odds of at least 1,000:1
has been defined as a tool for mapping these markers, and for future RH map
ping in the rat, More than 500 genes which have been mapped in mouse and/or
human were localized with respect to the rat RH framework, allowing the co
nstruction of detailed rat-mouse and rat-human comparative maps and illustr
ating the power of the RH approach for comparative mapping.