Claim · model-written summary
Thirty-nine percent of bread and durum wheat genotypes responded differently to Ptr race 1 and Ptr ToxA.
- Taxon
- bread and durum wheate0
- Material
- genotypese0
- Interactor
- Ptre0pathogen
- Outcome
- differential responsese0
- Value
- Thirty-nine percente0
Not reportedGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Verbatim
e0“Thirty-nine percent of both bread and durum wheat genotypes gave differential responses (Susceptible/insensitive and Resistance/Sensitive) to race1 and Ptr ToxA respectively.”
Title
Sidrat Abdullah Open PRAIRIE (South Dakota State University) 2017
Other claims from this paper (18)
- Observation Sixty-nine percent of bread and durum wheat cultivars were susceptible to both tan spot and stem rust.
- Observation Most of the 903 Ptr isolates carried ToxA, whereas a few carried ToxB.
- Observation About 77% of phenotyped Ptr isolates were assigned to race 1.
- Observation Forty-one percent of phenotyped Ptr isolates were identified as race 4.
- Observation Most race 4 isolates were recovered from rye, at 77%.
- Observation Only 4.3% of isolates were race 2.
- Observation Two isolates from South Dakota were classified as race 5.
- Observation Twenty-four isolates induced necrosis and chlorosis in Glenlea and 6B365, or necrosis only in Glenlea, despite lacking ToxA.
- Association Rye lines were more susceptible to Ptr race 5 (39%) than race 1 (21%).
- Observation Rye lines were insensitive to Ptr ToxA and Ptr ToxB.
- Association Stem rust resistance was not correlated with increased tan spot occurrence.
- Mechanism The authors concluded Ptr ToxA alone does not explain increased tan spot disease since the 1970s.
- Observation Ptr races 1 and 4 were largely prevalent on rye in the region.
- Observation Race 4 isolates were avirulent on wheat, suggesting a minimal epidemiological role.
- Recommendation Rye was proposed as a potential source of tan spot resistance.
- Observation Ptr isolates from wheat showed broad virulence variation in South Dakota, the Baltic region and Romania.
- Observation Some Ptr isolates from South Dakota, Lithuania and Romania lacked ToxA and did not fit the eight prevalent races.
- Observation Ptr race 5 was observed for the first time in South Dakota.