Relationships of small interfering RNAs (siRNAs), DNA methylation, and transposable elements (TEs) and their variations in maize hybrids. (a) Distribution of 24 nt siRNA clusters, DNA methylation, and main TE classes on maize chromosome 1. (b) Overlap of 22 nt and 24 nt siRNA clusters and methylated DNA regions with distinct TE classes in the maize genome. B, B73; M, Mo17; DTA, hAT; DTC, CACTA; DTH, PIF/Harbinger; DTM, Mutator; DTT, Tc1/Mariner; RIL, LINE; RIX, Unknown LINE; RLC, Copia; RLG, Gypsy; RLX, Unknown LTR. (c) Correlation between 24 nt siRNAs and DNA-methylation levels at the same genomic loci.
He et al. Genome Biology 2013 14:R57 doi:10.1186/gb-2013-14-6-r57