Data for Zhang et.al. 2012 received on June 25, 2012. Most markers are MIT markers. 5 markers are NDS markers. Found all except one (D16NDS2) in MGI. Tried BLASTing the primer sequences and came up with Chr 16 contigs, but no location. Found an entry for D16NDS2 at http://www.gene-profiles.org/gene/d16nds2-mus-musculus-27953 The cross originally had sex = 1 and pgm = 1. This tells R/qtl that the mice are males with the cross direction as (CxB)x(CxB). I changed the sex to 0 (females) because this is what the manuscript describes. I also changed Chr 20 to X so that R/qtl could check the genotypes. After communicating with the authors, we got a pgm column with strain values in it. I changed the "B" values to "1" and the "C" values to "0". Then the X Chr read in with 6 bad CC genotypes and 16 bad BB genotypes on the X Chr. It appears that Chr 2 and 13 have some genotype problems. The map is greatly expanded on both chromosomes. The first maker on Chr2 (D2Mit1)may have problems. D2Mit1 D2Mit328 D2Mit398 D2Mit423 D2Mit411 D2Mit263 D2Mit148 2.2259 42.8863 61.7590 73.5711 80.0447 82.9480 100.4921 D2Mit328 D2Mit1 - BB BC CC - 1 0 0 0 BB 0 19 28 14 BC 6 27 65 27 CC 2 16 42 19 The 4th marker on Chr 13 (D13Mit63) may have problems. D13Mit136 D13Mit250 D13Mit202 D13Mit63 D13Mit76 D13Mit151 13.9912 30.0580 47.4260 49.6690 62.3452 64.7153 D13Mit63 D13Mit202 - BB BC CC - 1 1 0 1 BB 0 29 21 5 BC 0 21 97 17 CC 0 5 27 41 D13Mit76 D13Mit63 - BB BC CC - 1 0 0 0 BB 0 19 29 8 BC 0 27 80 38 CC 0 7 23 34