Fig. 4: Origin of FERR-R and its function in repressing FERR.
From: Evidences for a role of two Y-specific genes in sex determination in Populus deltoides
a Sequence homology analysis for FERR-R. e1–e5 represent the five exons of FERR (in black) or HEMA1 (in red). S1–S8 indicate the duplicated segments described in the text. b Abundance of FERR-R transcripts and the FERR-R generated siRNAs, and the differential methylation of FERR in the two sexes. The gray shadow shows the region methylated only in males, and the red vertical bars indicate the methylation levels in this region. c Transient expression experiment in poplar protoplasts. siFERR is siRNA generated by FERR-R. FERR′ is the siRNA-resistant version of FERR. Three independent experiments were performed with similar observation.
