A novel viral expression vector was developed using Broad bean wilt virus 2 (BBWV-2).
The first example of a viral vector from the genus Fabavirus.
GFP was successfully expressed by BBWV-2 vector in various organs of gentian.
GFP expression via BBWV-2 vector was stable at least up to 162 days in gentian.
BBWV-2 vector can be used in petal color modification of gentian flower.