Claim · model-written summary
PVYNb showed greater standing diversity and more lineage-specific nonsynonymous change than PVYSt.
- Taxon
- potato virus Y
Potato virus Yt0 - Material
- PVYNbe0
- Outcome
- standing diversity and more lineage-specific nonsynonymous changee0
- Direction
- greatere0
Verbatim
t0“two isolates of potato virus Y”
e0“PVYNb showed greater standing diversity and more lineage-specific nonsynonymous change”
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 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.
- Mechanism The balance between selection and drift in PVY depends strongly on host permissiveness and demographic constraints.