Parental genetic contributions in the AXB and BXA recombinant inbred mouse strains

Parental genetic contributions in the AXB and BXA recombinant inbred mouse strains Recombinant inbred (RI) strains are a valuable tool in mouse genetics to rapidly map the location of a new locus. Because RI strains have been typed for hundreds of genetic markers, the genotypes of individual strains within an RI set can be examined to identify specific strain(s) containing the desired region(s) of interest (e.g., one or more quantitative trait loci, QTLs) for subsequent phenotype testing. Specific RI strains might also be identified for use as progenitors in the construction of consomic (chromosome substitution strains or CSSs) or congenic lines or for use in the RI strain test (RIST). To quickly identify the genetic contributions of the parental A/J (A) and C57BL/6J (B) strains, we have generated chromosome maps for each commercially available AXB and BXA RI strain, in which the genetic loci are colorcoded to signify the parent of origin. To further assist in strain selection for further breeding schemes, the percentages of A and B parental contributions were calculated, based on the total number of typed markers in the database for each strain. With these data, one can rapidly select the RI strain(s) carrying the desired donor and recipient strain region(s). Because points of recombination are known, starting with RI mice to generate CSSs or congenic lines immediately reduces genomewide screening to those donor-strain regions not already homozygous in the recipient strain. Two examples are presented to demonstrate potential uses of the generated chromosome maps: to select RI strains to construct congenic lines and to perform an RIST forAliq1, a QTL linked to ozone-induced acute lung injury survival. Mammalian Genome Springer Journals

Parental genetic contributions in the AXB and BXA recombinant inbred mouse strains

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Copyright © 2002 by Springer-Verlag New York Inc
Life Sciences; Anatomy; Cell Biology; Zoology
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