Claim · model-written summary
Only a few late-passage N. benthamiana PVY lineages showed elevated pN/pS ratios, indicating that positive selection was rare and not consistently replicated.
- Taxon
- Nicotiana benthamiana
Nicotiana benthamianae1 - Interactor
- potato virus Y
Potato virus Yt0pathogen - Outcome
- πN/πS ratiose0
- Direction
- elevatede0
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two isolates of potato virus Y”
e1“Bentham’s tobacco (Nicotiana benthamiana)”
e0“Only a few late-passage benthamiana lineages displayed elevated πN/πS ratios, indicating that positive selection was rare and not consistently replicated”
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.
- 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.