Genetic Study on Two Wild Mutants of Rats (Preliminary note on experimental breeding and genetics of small mammals 2)

Abstract

Two coat colour mutants of rats (Rattus norvegicus) were caught in the suburbs of Mishima. One of them, a female rat, was characterized by an yellow coat and pink eye, and the other mutant male was characterized by gray coat, ruby eye.
From the genetic analysis of two mutants, it was found that the former has gene p and the latter has gene p^m which is an allelomorph to gene p in wild caught rat.
By successive inbreeding of rats with new mutant charactors, several bred in strains, such as NIG-II, NIG-III and NIG-IV ......are being established in authors' laboratory.