Origin: from ♀ C57BL/6JRj and ♂ SJL/JRj (from JANVIER LABS) 

Strain name: B6SJLF1/JRj 

Type : Hybrid mouse 

Colour and related genotype: Agouti mouse 

Breeding: Easy to rear, good maternal instinct 

These F1 hybrids are the result of a cross between a C57BL/6JRj female and a SJL/JRj male. F1 hybrids are heterozygous at every locus (provided that the parental strains have different alleles). As is the case with inbred strains, they are genetically and phenotypically uniform. F1 hybrids are often used for their hybrid vigour (resistance and acitivity). They are especially interesting as genetic background (vigour and repeatability of genetic inheritance) for harmful phenotype models, for tissue transplantation, to determine mechanisms of inheritance, to create or improve expression of polygenic disease. It is also used in behavioural studies, radiation, safety and efficacy testing for nutrients, medicine, pathogens or hormones.