Recruitment for silencing. The panels display a contour map of the total number of TEs at t = 2 yr. Nuclear dsRNA formation is on the × axis, while cytoplasmic dsRNA formation is on the y axis. Note the different scale of the axis between the figures. A. RdRP model. There is a distinct gradient of total number of TEs along the y axis. B. Hairpin model, with a clear gradient of total number of TEs along the × axis. C. Antisense model, with a gradient of total number of TE along both axes.