CHROMOSOMAL HOMOLOGY OF RABBIT (ORYCTOLAGUS CUNICULUS) LINKAGE GROUP VI WITH RODENT SPECIES

R. R. Fox and L. F. M. Van Zutphen

Homologous portions of linkage group (LG) VI in the rabbit Oryctolagus cuniculus, chromosome 8 in Mus musculus, and LG V of Rattus norvegicus have been observed. These linkage groups in Oryctolagus and Mus contain the extension locus (e), where recessive alleles are known in many species. Preliminary linkage data have added new loci to linkage group VI of the rabbit, revised the order and map distances on the linkage map, and by comparison with rodent species have strengthened the homology of LG VI in the rabbit with chromosome 8 of the mouse and with LG V of the rat. LG VI now contains five loci with the following order and intervening map distances: Es-1, Es-2 complex—6.3 ± 2.1 cM—Est-1, Est-2 complex—18.5 ± 3.7 cM—e.