RNA 1 encodes the RNA dependent RNA polymerase (RdRp) or replicase
protein responsible for the propagation of Beet Necrotic Yellow
Vein Virus (BNYVV).
The RZM genetic element is the inverted repeat of a part of the
RNA-1 gene transcript of the BNYVV.
In plants carrying the RZM gene, it confers resistance to
Rhizomania disease caused by BNYVV by disrupting the
replication process of the virus thus leading to a reduction in the
development of the virus in the plant.