Six independent DNA probes, lambda Mm1C-150, lambda Mm1C-153, lambda Mm1C-156, lambda Mm1C-162, lambda Mm1C-163, and lambda Mm1C-165, have been isolated from a library of microdissected fragments from mouse chromosome 1, spanning cytogenetic bands C2 to C5. These DNA probes have been mapped by restriction fragment length polymorphism analysis with respect to 12 marker loci previously assigned to this portion of mouse chromosome 1, in a panel of 251 segregating Mus spretus x C57BL/6J interspecific backcross mice. The gene order and intergene distances were determined by segregation analysis to be centromere- lambda Mm1C-162-11.1 cM-Col3a1-8.8 cM-Len-2-2.6 cM-lambda Mm1C-163-1.6 cM-Fn-1-1.6 cM-Tp-1-0.8 cM-lambda Mm1C-165/Vil-0.4 cM-Inha-2.8 cM-lambda Mm1C-153-2.4 cM-lambda Mm1C-156-1.2 cM-Pax-3-5.6 cM-Akp-3-0.8 cM-Acrg-2.0 cM-Sag-0.5 cM-Col6a3-1.8 cM-lambda Mm1C-150-15.4 cM-Ren1,2. Four of these probes map within a chromosome 1 segment that is homologous to human chromosome 2q. Southern blotting analyses indicate that one of these anonymous probes, lambda Mm1C-165, detects DNA fragments highly conserved across species. These novel polymorphic probes should prove useful for linkage and physical mapping of this chromosomal region.
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