Diagrammatic representation of papaya sex chromosomes showing putative centromeres and inversion region. The sex specific regions are shown on dark blue and pseudo-autosomal regions are shown on light blue. Bottom panel shows the zoomed view of sex determining region. The blue dotted line represents the gap on physical map with the putative centromere represented by dotted circle. The red curves indicate the higher sRNA expressing loci adjacent to the gaps; the purple bar below X chromosome represents an X specific genes. The green dotted lines indicate approximate position for the inversion I  on the Y chromosome relative to the X chromosome.
Aryal et al. BMC Genomics 2014 15:20 doi:10.1186/1471-2164-15-20