129/Sv Mouse

**Semantic type:** Mammal

**Definition:** Derived by Dunn (1928) from a mouse/chinchilla cross, the 129/Sv substrain has been recognized as a member of the Parental subgroup of substrains. Strain 129/SvJ was genetically contaminated in 1978 by an unknown strain and differs from other 129 substrains at 25% of SSLP genetic markers, therefore a nomenclature re-designation of 129cX/Sv has been suggested.

**Synonyms:** - 129/SV - 129/Sv