Visualization of ribonucleic acid sequencing (RNA-seq) short read mapping relative to maize gene models. Wiggle tracks indicating chromosomal positions of mapped reads were generated using the wiggles program within TopHat version 1.2.0 (Trapnell et al., 2009) and visualized with the Integrated Genome Browser (Nicol et al., 2009). The maize gene track represents genes in the version 2 (v2) annotation. Figure panels show selected genes with A. differential expression, B. female exclusive expression, C. male exclusive expression, and D. seed exclusive expression. The y axes indicate number of reads mapped. Numbers to the right of the wiggle tracks represent the normalized fragments per kilobase pair of exon model per million fragments mapped (FPKM) expression values for each tissue calculated by Cufflinks (Trapnell et al., 2010). ATPase, adenosine triphosphatase; DAP, days after pollination; Pre-em, preemergence; Post-em, postemergence.