FIG 1.

Illustration of potential population bottlenecks occurring during FBNSV life cycle from apex to apex. (Upper) In our experiment, bottlenecks can impact viral populations during the transmission step or during plant colonization. (A and B, lower) Effect of population bottlenecks on the viral population, when the bottleneck occurring during plant colonization is narrower than the one occurring during transmission (A) or when the transmission bottleneck is narrower than the one occurring during plant colonization (B). Blue and red capsids represent two alleles of the same FBNSV segment.