Figure 2. Distribution and classification of 6,584 citrus lncRNAs.

(A) Genome-wide distribution of citrus lncRNAs compared with protein-coding genes. Chromosomes are indicated in different colors and in a circular form as the outer thick track. The inner chromosome scale (Mb) is labeled on each chromosome. On the second track (outer to inner), each vertical red line shows the location of protein-coding genes throughout the whole citrus genome. In the next two tracks, the abundances of protein-coding genes and lncRNAs in physical bins of 10 Mb per chromosome are indicated by blue and red columns, respectively. On the fourth track, each vertical purple line shows the location of lncRNAs throughout the entire citrus genome. (B) Classification of citrus lncRNAs according to their genomic position and overlap with protein-coding genes. Numbers of lncRNAs in the sense or antisense strand for each of the three main classes are labeled in the columns (intergenic, intragenic, and antisense).