Abstract
ABSTRACT Sheath blight is one of the most important and intractable diseases of rice (Oryza sativa) where limited control has been achieved using traditional approaches. Quantitative inheritance, extraneous traits, and environmental factors confound genetic analysis of host resistance. A method was developed to isolate and utilize a phytotoxin from Rhizoctonia solani to investigate the genetics of sheath blight susceptibility. Infiltration of the toxin preparation into plant leaves induced necrosis in rice, maize, and tomato. Using 17 rice cultivars known to vary in sheath blight resistance, genotypes were identified that were sensitive (tox-S) and insensitive (tox-I) to the toxin, and a correlation (r = 0.66) between toxin sensitivity and disease susceptibility was observed. Given the broad host range of R. solani, genotypes of host species may be both tox-S and tox-I. A total of 154 F(2) progeny from a cross between Cypress (tox-S) and Jasmine 85 (tox-I) segregated in a 9:7 ratio for tox-S/tox-I, indicating an epistatic interaction between two genes controls sensitivity to the toxin in rice. This work provides the means to genetically map toxin sensitivity genes and eliminate susceptible genotypes when developing sheath blight-resistant rice cultivars.
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Claims 6
Claim · model-written summary
Rhizoctonia toxin infiltration induced necrosis in rice.
- Taxon
- rice
Oryza sativae0 - Treatment
- Infiltration of the toxin preparatione0
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie1pathogen - Outcome
- necrosis in ricee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Infiltration of the toxin preparation into plant leaves induced necrosis in rice, maize, and tomato.”
e1“phytotoxin from Rhizoctonia solani”
Claim · model-written summary
Rhizoctonia toxin infiltration induced necrosis in maize.
- Treatment
- Infiltration of the toxin preparatione0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- necrosis in rice, maize, and tomatoe0
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Infiltration of the toxin preparation into plant leaves induced necrosis in rice, maize, and tomato.”
e1“phytotoxin from Rhizoctonia solani”
Claim · model-written summary
Rhizoctonia toxin infiltration induced necrosis in tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Infiltration of the toxin preparatione0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- necrosis in rice, maize, and tomatoe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Infiltration of the toxin preparation into plant leaves induced necrosis in rice, maize, and tomato.”
e1“phytotoxin from Rhizoctonia solani”
Claim · model-written summary
Rice toxin sensitivity correlated with sheath blight susceptibility at r = 0.66.
- Taxon
- riceOryza sativae1
- Interactor
- Rhizoctonia solaniRhizoctonia solanie2pathogen
- Outcome
- disease susceptibilitye0
- Value
- r = 0.66e0
- Comparator
- toxin sensitivitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a correlation (r = 0.66) between toxin sensitivity and disease susceptibility was observed.”
e1“Using 17 rice cultivars known to vary in sheath blight resistance”
e2“phytotoxin from Rhizoctonia solani”
Claim · model-written summary
F2 rice progeny segregated 9:7 for toxin sensitivity, indicating epistasis between two genes.
- Taxon
- riceOryza sativae0
- Material
- Cypresse0
- Outcome
- segregated in a 9:7 ratio for tox-S/tox-Ie0
- Value
- 9:7 ratioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 154 F(2) progeny from a cross between Cypress (tox-S) and Jasmine 85 (tox-I) segregated in a 9:7 ratio for tox-S/tox-I, indicating an epistatic interaction between two genes controls sensitivity to the toxin in rice.”
Claim · model-written summary
The toxin assay provides a means to map sensitivity genes and remove susceptible genotypes in rice breeding.
- Taxon
- rice cultivarsOryza sativae0
- Outcome
- genetically map toxin sensitivity genese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This work provides the means to genetically map toxin sensitivity genes and eliminate susceptible genotypes when developing sheath blight-resistant rice cultivars.”
The same questions in other papers
pathogen product · Rhizoctonia solani · Zea mays (maize)Positive and negative results
1 in the opposite direction
- positive
pathogen product · Rhizoctonia solani · Solanum lycopersicum (tomato)Positive and negative results
2 in the opposite direction
- positive
- positive
pathogen product · Rhizoctonia solani · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 8 in the opposite direction
- positive
- negative
- positive
7 papers more in this group
See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.