1. The publication of the project included two crosses --- (C3HxB6)xB6 backcross and (C3HxB6)xC3H backcross. Updated the map with Build37 Shifman genetic map and saved the new files as "Mahler2002a_B6BC_B37_Data.csv" and "Mahler2002b_C3HBC_B37_Data.csv" in separated project folders --- "Mahler_2002a "and "Mahler_2002b". The files are ready to be input into Rqtl. This is the readme file of (C3HxB6)xB6 backcross; 2. Generate a description file of the project, it includes the general information, definitions of the phenotypes, description of the genotypes and information of the missing markers; 3. For the genotypes of this cross: (cM=centimorgan, bp=basepair) (1) Change the symbol of missing genotypes from "=" (original data) to "-" (standard format in data sets of QTL archive) in B37 data file; (2) The bp positions of marker "D3Mit19" and "D14Mit30" are missed in both Shifman map and MGI. Primer sequences found in MGI, but their locations don't match the results from primer-BLAST in NCBI. We could not identify the B37 bp positions of these two markers currently (the letters are highlighted with pink color in description file); (3) Unable to find cM position of marker "D12Nds2" from Shifman map directly, bp positions assigned based on MGI, then convert it to cM through Map Converter tool (this marker is highlighted with light yellow color in description file); (4) Marker "D16Mit212" misses bp position in both Shifman map and MGI database. Primer sequences found in MGI, and their locations identified using primer-BLAST in NCBI followed by UCSC In-Silico PCR (it is highlighted with green color in description file); (5) 4 markers miss their bp positions in Shifman genetic map, assign the positions from current MGI database. This type of markers are highlighted with orange color and please see description file for details. 4. For the phenotypes of the cross: Change the symbol of female mouse in "Sex" from "F" to "0", male mouse from "M" to "1" in B37 data file; 5. Except the "csv" file mentioned above, I also saved the description file, original data, data with B37 map, data process and list of missing markers together as a big excel file ("Data_Description_C3HxB6_Mahler2002a.xlsx") (1st curating work is finished in 2009, files are updated on 1/13/2011). 6. Information were updated on 11/16/2011: (1) Change the name of the map (from "Shifman" to "Cox" map) in description and readme file, add a map reference in description file; (2) Generate genetic map plot, missing genotypes plot, map comparison plot, whole genome RF plot and problematic chromosome RF plots for B37 data. The genotype values of the 5th marker on chr 3 was complete missing. The last marker on chr 4 might have a map problem (observed from map comparison plot). All quality control plots were saved in "QCReport_Mahler2002a.pdf".