Bottlenecks and complementation in the aphid transmission of citrus tristeza virus populations
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Aphid transmission is a major factor in the formation of citrus tristeza virus (CTV) populations. Here, we examined the effect of population interaction on aphid transmissibility of different CTV genotypes. We found that there was no correlation between the proportion of viral genotypes in the source population and what was transmitted. We next examined the transmission of a poorly transmitted infectious cDNA clone (T36) in mixture with other CTV genotypes. T36 transmission increased from 0.5% alone, to up to 35.7%, depending on the coinfecting genotype. These results suggest that interaction between CTV genotypes affects the transmission of this virus.
The authors wish to acknowledge the contributions made by the late S. Garnsey, not only in this study, but also to the field of citrus virology as a whole. The authors also wish to acknowledge the assistance of T. Shilts and J. Capps in performing the aphid transmissions, and C. Bierman for performing the ELISA assays. This research was supported in part by an endowment from the J.R. and Addie S. Graves family and the Florida Agricultural Experiment Station.
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Conflict of interest
The authors declare that they have no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors.