Download the entire AKXD genotype file used in GeneNetwork (n = 1352 markers with useful strain distribution patterns from a total of 5448 informative markers). We have modified the original Wellcome-CTC genotypes by adding selected microsatellite markers. We have also curated the data and have removed somewhat improbable double-recombinant haplotypes by imputing genotypes for a few untyped strains using very tightly linked markers. This genotype "smoothing" may remove some genuine recombinations and may result in linkage maps that will be very slightly conservative.