Abstract
A set of isolates of Septoria musiva differed in aggressiveness in hybrid poplar leaf disk and stem assays and culture growth in vitro. Clone x isolate interactions were observed in one of the stem assay experiments, but not in the leaf disk assay experiments. Random amplified polymorphic DNA (RAPD) analyses were performed using 52 isolates of S. musiva collected from hybrid poplars and a native poplar species in Minnesota, Wisconsin, Iowa, South Dakota, and North Dakota. There was a large degree of genetic similarity, although each isolate had a unique RAPD pattern. No relationships among isolates were found for molecular genetic distance and host clone, parentage, or taxonomic classification section; location or date of collection; or the previously determined level of field resistance of the host clones to Septoria canker. Results of the stem and leaf disk assays indicate that it may not be necessary to choose the most aggressive isolate for disease resistance screening. It may be more useful to select isolates that will discriminate the greatest variation in levels of disease resistance among the clones that are being screened.
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Claims 7
Claim · model-written summary
Septoria musiva isolates differed in aggressiveness in hybrid poplar leaf disk and stem assays.
- Interactor
- Septoria musivaSphaerulina musivae0pathogen
- Outcome
- aggressivenesse0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isolates of Septoria musiva differed in aggressiveness in hybrid poplar leaf disk and stem assays”
Claim · model-written summary
The isolates differed in culture growth in vitro.
- Interactor
- Septoria musivaSphaerulina musivae0pathogen
- Outcome
- culture growth in vitroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isolates of Septoria musiva differed in aggressiveness in hybrid poplar leaf disk and stem assays and culture growth in vitro”
Claim · model-written summary
Clone by isolate interactions occurred in one stem assay but not leaf disk assays.
- Interactor
- Septoria musivaSphaerulina musivat0pathogen
- Outcome
- Clone x isolate interactionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clone x isolate interactions were observed in one of the stem assay experiments, but not in the leaf disk assay experiments”
t0“Septoria musiva”
e1“hybrid poplar leaf disk and stem assays”
Claim · model-written summary
The isolates showed large genetic similarity but each had a unique RAPD pattern.
- Interactor
- S. musivaSphaerulina musivae1pathogen
- Outcome
- genetic similaritye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a large degree of genetic similarity, although each isolate had a unique RAPD pattern”
e1“isolates of S. musiva collected from hybrid poplars”
Claim · model-written summary
Molecular genetic distance was unrelated to host clone, parentage, taxonomic section, collection place or date, or host field resistance.
SeptoriaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No relationships among isolates were found for molecular genetic distance and host clone, parentage, or taxonomic classification section; location or date of collection; or the previously determined level of field resistance of the host clones to Septoria canker”
e1“hybrid poplars and a native poplar species”
Claim · model-written summary
The authors suggest that selecting the most aggressive isolate may be unnecessary for resistance screening.
- Outcome
- choose the most aggressive isolate for disease resistance screeninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it may not be necessary to choose the most aggressive isolate for disease resistance screening”
e1“hybrid poplar leaf disk and stem assays”
Claim · model-written summary
The authors suggest choosing isolates that best discriminate resistance variation among screened clones.
- Outcome
- select isolates that will discriminate the greatest variation in levels of disease resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“select isolates that will discriminate the greatest variation in levels of disease resistance among the clones that are being screened”
e1“hybrid poplar leaf disk and stem assays”