1. This project (Feng_2009) included 8 F2 intercross Ð 129xA/J, 129xDBA/2, AKRxNZW, BTBRxSWR, C3HxKK, FVBxRIII, PLxCBA and SJLxRIII. Their map were updated to Build37 Cox genetic map and the new files were saved in 8 separated folders (from ÒFeng_2009aÓ to ÒFeng_2009hÓ). These files are ready to be read into Rqtl; 2. Generated a description file of the project, it includes the general information, definitions of phenotypes, description of genotypes and information of missing markers; 3. For folder "Feng_2009d", it has the description and B37 cross file (.csv) of "BTBRxSWR" F2 intercross; 4. For the genotypes of "BTBRxSWR" cross: (cM=centiMorgan, bp=basepair) (1) The authors used SNP markers for this project. All the markers have been converted into standard SNP marker (start with "rs") in B37 data file; (2) Marker "02-0429535369 (rs3670748)","07-048028246 (rs3679388)","13-037832161 (rs3659063)" and "15-049283927 (rs3719583)" had genotyping problems and they were dropped from B37 cross file; (2) Could not find any basepair information of marker "rs3716095" in current databases, highlight this marker with yellow color in description file; (3) There was no X chromosome in this cross 5. For the phenotypes of "BTBRxSWR" cross: (1) it only included 336 male mice in total; (2) Could not find the definition of phenotype "MAP" from paper, it was highlighted with blue color; 6. Except the "csv" file mentioned above, save the description file, original data files, data files with B37 map, data process record and missing marker list together as a big excel file ("Data_Description_BTBRxSWR_Feng2009.xlsx"). (first curating work finished on 5/17/2010, the files are updated on 6/30, 11/10/2010) 7. Information updated on 10/19/2011: (1) Found the B37 cM and basepair positions of marker "rs3716095" (marker name in original file was "12-081758527") and added them in B37 data file, updated the information in description and readme file; (2) Change the name of the map (from "Shifman" to "Cox" map) in readme file, add a map reference in description file; (3) Quality control plots (genetic map, missing genotypes plot, map comparision plot and whole genome RF plot) performed and no issues found. All quality control plots were saved in ÒQCReport_Feng2009d.pdfÓ.