The following is expression data from mated female heads. Each sample is from F1 females from a cross between a pA RIL and a pB RIL. Each sample includes heads from 250 - 300 individuals. Expression was assayed using 12 x 135 NimbleGen Arrays. Available data: 1) Pre-Processed Expression Data: The dataset following normalization, background correction, new probe-gene mapping, correction for batch effects, and dropping transcripts below background levels. The first two columns identify the maternal and paternal RILs. The remaining 11064 columns are the expression values. Column names are CG numbers. 2) LOD scores for all genes: LOD scores following QTL mapping for all transcripts including those deemed below background levels. The first two columns are chromosome and position. The remaining 14293 columns are LOD scores for each transcript. Column names are CG numbers. 3) Raw Nimblegen Pair Files 4) Array IDs: This file identifies which array and zone each RIL cross is. It is necessary to use the raw pair files.