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Strain Assignments to QTL Data
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16 months ago

I have genotypes for two inbred mouse strains on the original MUGA array from GeneSeek.

The data comes back with genotypes either A, H, or B at 1 of roughly 8000 markers on the array.

  • The genotype is labeled A or B according to the Illumina Top/Bot Strand system ( and NOT based on the strain. i.e. Strain P is not always labeled A, and Strain Q is not always labeled B, the system depends on the actual alleles present at each individual SNP.

  • The genotype is labeled H if the individual is heterozygous at that marker

I have these files:

  1. A/H/B genotype calls, for each marker, from my data set.
  2. A file with the alleles present at each individual SNP at each marker for the strains used.

If my mouse strains are P and Q. I want to automate the assignment of P/PQ/Q rather than A/H/B in the genotype file. Is there a program available to do this?

i.e. I need to process this information:

- From file 2-- For Marker X, Strain P allele = T, Strain Q allele = G and this means, in File 1 at marker (X) A = Strain P and B = Strain Q. Or conversely: For Marker Y, Strain P allele = C, Strain Q allele = A and this means in File 1 at marker (Y) A = Strain Q and B = Strain P.



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