Fig. 1

Frequency of small RNA reads in infected potato cv. Russet Burbank plants mapped to respective individual genes of Potato virus Y (PVY) using bowtie (v1.1.0). Small RNA reads mapped to PVY genome of tobacco veinal-necrotic strain (PVY-N) are shown in blue. Small RNA reads mapped to PVY genome of necrosis tuber-necrotic strain (PVY-NTN) are shown in orange. Small RNA reads mapped to PVY genome of ordinary strain (PVY-O) are shown in grey