Abstract
Plant disease susceptibility is often increased by nitrogen (N) application. Therefore, it is important to know if resistance loci are effective in different plant N environments. One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population were grown in two N treatments and tested for partial resistance to blast (Magnaporthe grisea) isolate CD100. Disease severity (DS), the number and size of lesions and plant N and C concentrations were measured and the results subject to quantitative trait loci (QTL) and QTL x environment analysis. There was a 66% higher plant N concentration in the high N treatment and DS increased significantly, mostly as a result of increased numbers of lesions. Nine regions contained QTL for disease traits but only one showed evidence of statistically significant QTL x treatment interaction. This was a large effect quantitative trait locus at marker R1933 on chromosome 12 which was less effective at high N. Apparently, blast disease is increased by higher plant N, but the efficacy of partial resistance genes is not greatly affected by N application.
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Claims 6
Claim · model-written summary
Plant N concentration was 66% higher in the high N treatment.
- Taxon
- rice
Oryza sativae0 - Treatment
- high N treatmente1
- Outcome
- plant N concentratione1
- Direction
- highere1
- Value
- 66%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population”
e1“There was a 66% higher plant N concentration in the high N treatment”
Claim · model-written summary
Blast disease severity increased significantly in rice under high N, mostly as a result of increased numbers of lesions.
- Taxon
- riceOryza sativae0
- Treatment
- high N treatmente1
- Interactor
- Magnaporthe grisea
Pyricularia griseae3pathogen - Outcome
- DSe2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population”
e1“There was a 66% higher plant N concentration in the high N treatment”
e2“DS increased significantly, mostly as a result of increased numbers of lesions”
e3“blast (Magnaporthe grisea) isolate CD100”
Claim · model-written summary
Nine regions of the rice genome contained QTL for blast disease traits.
- Taxon
- riceOryza sativae0
- Outcome
- QTL for disease traitse1
- Value
- Nine regionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population”
e1“Nine regions contained QTL for disease traits”
Claim · model-written summary
Of the QTL regions, only one showed statistically significant QTL x treatment interaction.
- Taxon
- riceOryza sativae0
- Outcome
- QTL x treatment interactione1
- Value
- only onee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population”
e1“only one showed evidence of statistically significant QTL x treatment interaction”
Claim · model-written summary
The large-effect QTL at marker R1933 on chromosome 12 was less effective at high N.
- Taxon
- riceOryza sativae0
- Treatment
- high Ne1
- Gene
- quantitative trait locus at marker R1933 on chromosome 12e1
- Outcome
- less effectivee1
- Direction
- less effectivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population”
e1“large effect quantitative trait locus at marker R1933 on chromosome 12 which was less effective at high N”
Claim · model-written summary
The authors conclude that the efficacy of partial resistance genes is not greatly affected by N application.
- Taxon
- riceOryza sativae0
- Treatment
- N applicatione1
- Outcome
- efficacy of partial resistance genese1
- Direction
- not greatly affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One-hundred lines of the Bala x Azucena rice (Oryza sativa) mapping population”
e1“the efficacy of partial resistance genes is not greatly affected by N application”
The same questions in other papers
nitrogen · Pyricularia grisea · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- positive
nitrogen · molecular: expression · Oryza sativa (rice)Positive and negative results
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- negative
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See all 45 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.