The Rat Strain Ontology (RS) is currently being developed at the Rat Genome Database. For more information about this vocabulary or to request additions or changes, please contact us (http://rgd.mcw.edu/contact/index.shtml).
Transchromosomal strains carry a chromosome, chromosomal fragment, or engineered chromosome from another species existing as a separate, heritable, freely segregating entity or is centromerically fused to an endogenous chromosome.