Wavy: a new recessive rexoid mutant in the Norway rat.

A new rexoid mutant is reported for the Norway rat, Rattus norvegicus, designated as wavy (symbol wv) and inherited as an autosomal recessive. Breeding data indicate that wavy is not linked with the known rexoid variant, rex (Re) or with genes in linkage groups I and IV. Additional data indicate that rex is not linked with the linkage group IV gene, nonagouti (a) and confirm that it shows dominant autosomal inheritance. Since both wavy and rex are of full penetrance and viability and may tag new linkage groups, they should be useful as markers in linkage studies.