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 × 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 10
Claim · model-written summary
Septoria musiva isolates differed in aggressiveness in hybrid poplar leaf disks.
- Organ / stage
- leaf diske0
- Interactor
- Septoria musivaSphaerulina musivae0pathogen
- Outcome
- aggressivenesse0
- Direction
- differede0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A set of isolates of Septoria musiva differed in aggressiveness in hybrid poplar leaf disk and stem assays”
Claim · model-written summary
Septoria musiva isolates differed in aggressiveness in hybrid poplar stems.
- Organ / stage
- steme0
- Interactor
- Septoria musivaSphaerulina musivae0pathogen
- Outcome
- aggressivenesse0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A set of isolates of Septoria musiva differed in aggressiveness in hybrid poplar leaf disk and stem assays”
Claim · model-written summary
Isolates differed in culture growth in vitro.
- Interactor
- Septoria musivaSphaerulina musivae0pathogen
- Outcome
- culture growth in vitroe0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A set of 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.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clone × isolate interactions were observed in one of the stem assay experiments”
t0“Poplars”
Claim · model-written summary
Clone by isolate interactions were absent in leaf disk assays.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not in the leaf disk assay experiments”
e1“Clone × isolate interactions were observed in one of the stem assay experiments, but not in the leaf disk assay experiments”
t0“Poplars”
Claim · model-written summary
The isolates showed substantial genetic similarity.
- 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”
e1“52 isolates of S. musiva collected from hybrid poplars”
Claim · model-written summary
Each isolate had a unique RAPD pattern.
- Interactor
- S. musivaSphaerulina musivae1pathogen
- Outcome
- unique RAPD patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“each isolate had a unique RAPD pattern”
e1“52 isolates of S. musiva collected from hybrid poplars”
Claim · model-written summary
Isolate molecular genetic distance showed no relationship with host clone, parentage, taxonomic section, collection location or date, or host field resistance.
- Material
- host clonee0
- Interactor
- S. musivaSphaerulina musivae1pathogen
- Outcome
- molecular genetic distancee0
- Direction
- No relationshipse0
Organisms 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“52 isolates of S. musiva collected from hybrid poplars”
Claim · model-written summary
Selecting the most aggressive isolate may be unnecessary for disease 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”
t0“Poplars”
Claim · model-written summary
Selecting isolates that discriminate resistance variation among clones may be more useful.
- 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“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”
t0“Poplars”