The present invention relates to an isolated GLRaV-3 protein or
polypeptide selected from a group of a polyprotein, a proteinase, a
methyltransferase, a helicase, and an RNA-dependent RNA polymerase. The
encoding DNA molecule either alone in isolated form or in an expression
system, a host cell, or a transgenic grape plant is also disclosed.
Another aspect of the present invention relates to a method of imparting
grapevine leafroll resistance to grape plants by transforming them with
the DNA molecule of the present invention.
