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Fig. 1 | BMC Plant Biology

Fig. 1

From: Maize RNA PolIV affects the expression of genes with nearby TE insertions and has a genome-wide repressive impact on transcription

Fig. 1

Distributions of gene expression differ between B73 and rpd1/rmr6 mutant. Frequency of genes with 0 FPKM (left), histograms of expression distribution (center) and cumulative frequency (right) for genes with >0 FPKM are reported for all the expressed genes (a), and further subdivided into reference annotations (b) and de novo annotated loci (c). In all three comparisons, the frequency of genes with no expression (0 FPKM) in one genotype is significantly higher in B73 than in rpd1/rmr6 (P = 0, by Fisher’s exact test) and the distributions of gene expression (including only genes with FPKM > 0) are statistically different between the two genotypes (P < 0.01 by Kolmogorov-Smirnov test). X-axis is log2 transformed FPKM value of gene expression (0 corresponds to FPKM =1, 2 to FPKM = 4, 4 to FPKM = 16, and so on). D-obs. represents the maximum vertical distance observed between the two curves while D-crit. is the critical distance value for the test. When both D-obs > D-stat and p < 0.01 the expression distributions are considered statistically different

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