Be aware that as of 8/2016 NAM qTeller now uses a new set of alignments and FPKM values from maize refgen 3. These values are likely to be different results downloaded prior to 8/2016. The old NAM data is avaliable at http://qteller.com/NAM_refgen2/
For questions or concerns please contact Daniel W. C. Ngu of the Schnable lab.
The RNA-seq data sets presented here from NAM parents are provided by the Schnable lab at Iowa State. While researchers should feel free to use these data for investigations of individual genes, it is asked that they refrain from genome- or transcriptome-wide analyses of this dataset until Schnable lab has published on it, so the people responsible can get proper credit for their hard work. Think of it like the Fort Lauderdale Agreement only for expression data.
For more information, contact them.
For more information on the NAM parental lines themselves, see the Buckler lab's website