Figure 2

Comparative analysis of individual intron length in P. glauca , A. thaliana P. trichocarpa and Z. mays . Box plots represent intron length data for all of the introns of the 35 genes used in comparative analyses. Intron lengths were compared among the four species by Kruskal-Wallis test with post-test analysis by Dunn’s multiple comparisons: NS, not significant (P ≥ 0.06); *P = 0.06; **P < 0.01; ***P < 0.001.