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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

High-resolution linkage map in the vicinity of the host resistance locus Bcg.

The mouse chromosome 1 locus Bcg determines natural resistance/susceptibility of inbred mouse strains to infection with antigenically unrelated intracellular parasites, including several Mycobacterium species, Salmonella typhimurium, and Leishmania donovani. In our effort to clone Bcg, we have constructed a high-resolution genetic linkage map in the vicinity of the gene. We have developed eight new highly polymorphic markers (simple sequence repeats) corresponding to cloned genes (Vil, Inha, Des), microdissected chromosome 1 anonymous probes (lambda Mm1C136, lambda Mm1C163, lambda Mm1C165), or novel DNA markers from the region obtained by chromosome walking (D1Mcg101 and D1Mcg105). We have followed the cosegregation of these markers with respect to Bcg in a novel panel of 1000 (C57L/J x C57BL/6J) x C57BL/6J segregating backcross mice. Additional segregation analyses were carried out in preexisting panels of intra- and interspecific backcross mice and recombinant inbred strains. Three of these markers were found to be very tightly linked to Bcg: lambda Mm1C165 did not show recombination with Bcg in 1424 meioses analyzed, while D1Mcg105 and lambda Mm1C136 were located 0.1 cM proximal and 0.2 cM distal to Bcg, respectively. This analysis enabled us to define further the proximal and distal boundaries of the Bcg interval: the proximal limit was defined by a single crossover occurring between D1Mcg105 and Bcg/lambda Mm1C165/Vil, and the distal limit by 1 cross-over between Bcg/lambda Mm1C165/Vil and lambda Mm1C136 in 1683 and 575 informative meioses, respectively, for a maximal interval of 0.3 cM.(ABSTRACT TRUNCATED AT 250 WORDS)[1]

References

  1. High-resolution linkage map in the vicinity of the host resistance locus Bcg. Malo, D., Vidal, S.M., Hu, J., Skamene, E., Gros, P. Genomics (1993) [Pubmed]
 
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