Abstract
A genetic typing method for the mouse and rat nude mutations by PCR and restriction fragment length polymorphism (RFLP) analysis was developed. Since restriction sites useful for RFLP analysis do not exist in the mouse nu and rat rnu mutations, artificial restriction sites were introduced by PCR with modified primers. Three genotypes in the mouse (nu/nu, nu/+ and +/+) or rat (rnu/rnu, rnu/+ and +/+) are rapidly differentiated with the PCR-RFLP assay. In addition, congenic nude strains can be efficiently established by using this assay. Finally, genetic mapping of the rnu locus was performed with microsatellite markers. The locus order on rat chromosome 10 was D10Mgh14-(2.0cM)-D10Mit2-(1.4cM)-rnu-(0.7cM++ +)-D10Mgh6-(2.7cM)-D10Mit8.
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