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Composition and size distribution of hc-siRNA in Ae. tauschii. The hc-siRNAs were categorized by their size and their source in mature leaves (2 replicates), roots (2 replicates), seedlings, and spikes. Yellow, green, cyan, and purple bars represent hc-siRNAs 21, 22, 23, and 24 nt long, respectively.
