The distribution of pre-miRNAs in the C. sinensis genome. Precursors of known miRNAs are shown as blue rectangle and precursors of novel miRNAs are shown as red rectangle. The width of rectangle indicated the length of the precursors while the height of oblong indicated the length of the chromosome/scaffold. The chromosome/scaffold and precursors scale are showed at the bottom of the figure. The chromosomal locations of the pre-miRNAs are indicated.