Abstract
The dominant Pvr4 gene identified in Capsicum annuum cv. Criollo de Morelos 334 (CM334) is frequently used in pepper cultivars because it possesses one of the largest spectra of action among plant virus resistance genes. This gene was previously shown to confer efficient resistance to all known Potato virus Y isolates, to Pepper mottle virus , to Pepper yellow mosaic virus and to Ecuadorian rocoto virus. This study showed that the W4 line, derived from CM334 and carrying Pvr4 , was also resistant to Peru tomato mosaic virus and Pepper severe mosaic virus , but not to Pepper veinal mottle virus , Chilli veinal mottle virus or Tobacco etch virus . It was noticed that the phenotype of the resistance was atypical since, in the W4 line, hypersensitive reaction or extreme resistance could be observed, depending on virus isolates and inoculated organs. Despite the large deployment of Pvr4 in hybrid cultivars, the numerous tests performed in controlled conditions and the use of W4 serial back‐inoculations with potyvirus isolates controlled by this line, no virulent variant isolates were obtained. However, it was shown that the use of graft inoculation experiments allow PVY virulent variants to be selected.
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Claims 8
Claim · model-written summary
The Pvr4-bearing W4 pepper line resisted Peru tomato mosaic virus.
Verbatim
e0“the W4 line, derived from CM334 and carrying Pvr4 , was also resistant to Peru tomato mosaic virus”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
The Pvr4-bearing W4 pepper line resisted Pepper severe mosaic virus.
Verbatim
e0“the W4 line, derived from CM334 and carrying Pvr4 , was also resistant to Peru tomato mosaic virus and Pepper severe mosaic virus”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
The W4 pepper line was not resistant to Pepper veinal mottle virus.
Verbatim
e0“but not to Pepper veinal mottle virus”
e1“the W4 line, derived from CM334 and carrying Pvr4”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
The W4 pepper line was not resistant to Chilli veinal mottle virus.
Verbatim
e0“but not to Pepper veinal mottle virus , Chilli veinal mottle virus”
e1“the W4 line, derived from CM334 and carrying Pvr4”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
The W4 pepper line was not resistant to Tobacco etch virus.
- Taxon
- peppert0
- Material
- W4 linee1
- Interactor
- Tobacco etch virus
Tobacco etch viruse0pathogen - Gene
- Pvr4e1
- Outcome
- not to Pepper veinal mottle virus , Chilli veinal mottle virus or Tobacco etch viruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not to Pepper veinal mottle virus , Chilli veinal mottle virus or Tobacco etch virus”
e1“the W4 line, derived from CM334 and carrying Pvr4”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
W4 pepper showed either hypersensitive reaction or extreme resistance depending on virus isolate and inoculated organ.
Verbatim
e0“in the W4 line, hypersensitive reaction or extreme resistance could be observed, depending on virus isolates and inoculated organs”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
Controlled tests and serial back-inoculations yielded no virulent potyvirus variants against W4 pepper.
- Taxon
- peppert0
- Material
- W4e0
- Outcome
- no virulent variant isolates were obtainede0
- Setting
- controlled conditionse0
PotyvirusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the numerous tests performed in controlled conditions and the use of W4 serial back‐inoculations with potyvirus isolates controlled by this line, no virulent variant isolates were obtained”
t0“Pvr4 resistance in pepper”
Claim · model-written summary
Graft inoculation allowed selection of PVY variants virulent on Pvr4 pepper.
- Taxon
- peppert0
- Treatment
- graft inoculation experimentse0
- Interactor
- PVY
Potato virus Ye0pathogen - Outcome
- PVY virulent variants to be selectede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of graft inoculation experiments allow PVY virulent variants to be selected”
t0“Pvr4 resistance in pepper”