Abstract
Abstract Sunflower downy mildew (SDM) caused by Plasmopara halstedii , is a major disease of sunflower. Eleven resistance genes have been identified, but allelic relationships among these genes are not clear. This study examined the inheritance and allelic relationships of genes conferring resistance to SDM races 1, 2 and 3 (virulence phenotypes 100, 300 and 700, respectively) and confirmed a twelfth resistance gene. Three USDA Plant Introductions, AMES 3235, PI 497250, and PI 497938, and three released lines, RHA 266, RHA 274 and DM‐2 were studied. RHA 266 has only the Pl 1 gene for race 1 resistance. Digenic inheritance of resistance was found in AMES 3235, PI 497250, and RHA 274. These lines have the Pl 1 and Pl 12 genes, conferring resistance to race 1, and the Pl 2 and Pl 11 genes, conferring resistance to race 2. DM‐2 and PI 497938 have Pl 12 (but not Pl 1 for resistance to race 1, the Pl 12 gene (but not the Pl 2 ) for resistance to race 2, and Pl 5 for resistance to race 3. These resistance genes will serve as a foundation for future gene designations and genetic diversity studies of resistance to SDM.
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Claims 6
Claim · model-written summary
RHA 266 has only Pl 1 for race 1 resistance.
- Taxon
- sunflower
Helianthus annuust0 - Material
- RHA 266e0
- Gene
- Pl 1e0
- Outcome
- race 1 resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RHA 266 has only the Pl 1 gene for race 1 resistance.”
t0“cultivated sunflower”
Claim · model-written summary
AMES 3235 has digenic resistance involving Pl 1 and Pl 12 for race 1 and Pl 2 and Pl 11 for race 2.
- Taxon
- sunflowerHelianthus annuust0
- Material
- AMES 3235e0
- Outcome
- Digenic inheritance of resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digenic inheritance of resistance was found in AMES 3235, PI 497250, and RHA 274. These lines have the Pl 1 and Pl 12 genes, conferring resistance to race 1, and the Pl 2 and Pl 11 genes, conferring resistance to race 2.”
t0“cultivated sunflower”
Claim · model-written summary
PI 497250 has digenic resistance involving Pl 1 and Pl 12 for race 1 and Pl 2 and Pl 11 for race 2.
- Taxon
- sunflowerHelianthus annuust0
- Material
- PI 497250e0
- Outcome
- Digenic inheritance of resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digenic inheritance of resistance was found in AMES 3235, PI 497250, and RHA 274. These lines have the Pl 1 and Pl 12 genes, conferring resistance to race 1, and the Pl 2 and Pl 11 genes, conferring resistance to race 2.”
t0“cultivated sunflower”
Claim · model-written summary
RHA 274 has digenic resistance involving Pl 1 and Pl 12 for race 1 and Pl 2 and Pl 11 for race 2.
- Taxon
- sunflowerHelianthus annuust0
- Material
- RHA 274e0
- Outcome
- Digenic inheritance of resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digenic inheritance of resistance was found in AMES 3235, PI 497250, and RHA 274. These lines have the Pl 1 and Pl 12 genes, conferring resistance to race 1, and the Pl 2 and Pl 11 genes, conferring resistance to race 2.”
t0“cultivated sunflower”
Claim · model-written summary
DM‐2 has Pl 12 but not Pl 1 for race 1 resistance, Pl 12 but not Pl 2 for race 2 resistance, and Pl 5 for race 3 resistance.
- Taxon
- sunflowerHelianthus annuust0
- Material
- DM‐2e0
- Outcome
- resistance to race 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Multiple race-specific gene results are compressed by abstract wording.
Verbatim
e0“DM‐2 and PI 497938 have Pl 12 (but not Pl 1 for resistance to race 1, the Pl 12 gene (but not the Pl 2 ) for resistance to race 2, and Pl 5 for resistance to race 3.”
t0“cultivated sunflower”
Claim · model-written summary
PI 497938 has Pl 12 but not Pl 1 for race 1 resistance, Pl 12 but not Pl 2 for race 2 resistance, and Pl 5 for race 3 resistance.
- Taxon
- sunflowerHelianthus annuust0
- Material
- PI 497938e0
- Outcome
- resistance to race 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Multiple race-specific gene results are compressed by abstract wording.
Verbatim
e0“DM‐2 and PI 497938 have Pl 12 (but not Pl 1 for resistance to race 1, the Pl 12 gene (but not the Pl 2 ) for resistance to race 2, and Pl 5 for resistance to race 3.”
t0“cultivated sunflower”