Claim · model-written summary
The balance between selection and drift in PVY depends strongly on host permissiveness and demographic constraints.
- Taxon
- potato virus Y
Potato virus Yt0 - Outcome
- balance between selection and drifte0
- Qualifier
- host permissiveness and demographic constraintse0
Verbatim
t0“two isolates of potato virus Y”
e0“the balance between selection and drift depends strongly on host permissiveness and demographic constraints”
Title
Experimental evolution of the host range dynamics in two isolates of potato virus Y
Ivair J Morais; João M F Silva; Alice K Inoue-Nagata; et al. Virus Evolution 2026. doi:10.1093/ve/veag010
Other claims from this paper (9)
- Observation Nicotiana benthamiana supported high PVY RNA accumulation.
- Observation Nicotiana benthamiana supported genetically stable viral diversity, consistent with large effective population sizes.
- Observation Potato created strong bottlenecks for PVY, often leading to viral lineage extinction and increased mutation fixation through genetic drift.
- Observation Tomato served as an intermediate host for PVY, with outcomes varying by virus strain.
- Observation Tomato acted as a sink host for some PVY lineages, resulting in unsuccessful infection in the next passage.
- Observation PVYNb showed greater standing diversity and more lineage-specific nonsynonymous change than PVYSt.
- Observation PVYSt exhibited greater genomic stability and pervasive purifying selection across most cistrons.
- Observation Only a few late-passage N. benthamiana PVY lineages showed elevated pN/pS ratios, indicating that positive selection was rare and not consistently replicated.
- Intervention effect Alternating between permissive and restrictive hosts helped prevent PVY lineage extinction.