Abstract
One-hundred and forty isolates of Sclerotinia sclerotiorum (Lib.) DeBary were obtained in a 6500-km2 area of the Buenos Aires Province. These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields. Fifty different mycelial compatibility groups (MCGs) were distinguished overall, 27 of which consisted of two or more isolates. Populations of S. sclerotiorum were made up by numerous MCGs and shared a similar frequency profile regardless the locality or the date of sampling. MCG occurrences differed among the crops, only two MCGs were shared by the three crops and approximately 60% of the MCGs were unique for each crop. The Shannon diversity index ( H o) of MCG for the whole region was 0.314 ( H tot). Partition of total diversity ( H tot) showed that 98.4% corresponded to variations of diversity within populations. Morphological characteristics were not significantly different among MCGs, except for the dry weight per sclerotium. On the basis of the detached celery petiole assay, there were no differences in aggressiveness between MCGs either. However, isolates collected from sunflower plants were more aggressive than those collected from soybean, regardless the MCG they belonged. Aggressiveness was positively correlated to colony radial growth. After principal component analyses (PCA) were performed, it could be identified a main central group of isolates and two other smaller groups. Main contributors to the total variance were the percentages of large sclerotia, the dry weight per sclerotium and the percentages of medium and small sclerotia.
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Claims 14
Claim · model-written summary
Fifty mycelial compatibility groups of Sclerotinia sclerotiorum were distinguished overall, 27 of them with two or more isolates.
- Taxon
- soybean
Glycine maxe1 - Interactor
- Sclerotinia sclerotiorum
Sclerotinia sclerotiorumt0pathogen - Outcome
- mycelial compatibility groups (MCGs)e2
- Value
- Fiftye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sclerotinia sclerotiorum”
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e2“Fifty different mycelial compatibility groups (MCGs) were distinguished overall, 27 of which consisted of two or more isolates”
Claim · model-written summary
Populations of S. sclerotiorum shared a similar MCG frequency profile regardless of locality or sampling date.
- Taxon
- soybeanGlycine maxe1
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume3pathogen
- Outcome
- frequency profilee3
- Qualifier
- regardless the locality or the date of samplinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e3“Populations of S. sclerotiorum were made up by numerous MCGs and shared a similar frequency profile regardless the locality or the date of sampling”
Claim · model-written summary
The Shannon diversity index of MCGs for the whole region was 0.314.
- Taxon
- soybeanGlycine maxe1
- Outcome
- Shannon diversity indexe4
- Value
- 0.314e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e4“The Shannon diversity index ( H o) of MCG for the whole region was 0.314”
Claim · model-written summary
Of total diversity of MCGs, 98.4% corresponded to variation within populations.
- Taxon
- soybeanGlycine maxe1
- Outcome
- variations of diversity within populationse5
- Value
- 98.4%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e5“Partition of total diversity ( H tot) showed that 98.4% corresponded to variations of diversity within populations”
Claim · model-written summary
MCG occurrences differed among the crops.
- Taxon
- soybeanGlycine maxe1
- Outcome
- MCG occurrencese6
- Qualifier
- among the cropse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e6“MCG occurrences differed among the crops, only two MCGs were shared by the three crops and approximately 60% of the MCGs were unique for each crop”
Claim · model-written summary
Approximately 60% of the MCGs were unique to each crop.
- Taxon
- soybeanGlycine maxe1
- Outcome
- unique for each crope6
- Value
- approximately 60%e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e6“MCG occurrences differed among the crops, only two MCGs were shared by the three crops and approximately 60% of the MCGs were unique for each crop”
Claim · model-written summary
Only two MCGs were shared by the three crops.
- Taxon
- soybeanGlycine maxe1
- Outcome
- shared by the three cropse6
- Value
- only twoe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e6“MCG occurrences differed among the crops, only two MCGs were shared by the three crops and approximately 60% of the MCGs were unique for each crop”
Claim · model-written summary
Morphological characteristics of the MCGs were not significantly different.
- Taxon
- soybeanGlycine maxe1
- Outcome
- Morphological characteristicse7
- Qualifier
- among MCGse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e7“Morphological characteristics were not significantly different among MCGs, except for the dry weight per sclerotium”
Claim · model-written summary
The dry weight per sclerotium differed significantly among MCGs.
- Taxon
- soybeanGlycine maxe1
- Outcome
- dry weight per sclerotiume7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e7“Morphological characteristics were not significantly different among MCGs, except for the dry weight per sclerotium”
Claim · model-written summary
No differences in aggressiveness were found between MCGs on celery petioles.
- Taxon
- soybeanGlycine maxe1
- Outcome
- aggressivenesse2
- Qualifier
- between MCGse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e2“there were no differences in aggressiveness between MCGs either”
Claim · model-written summary
Isolates from sunflower plants were more aggressive than isolates from soybean.
- Taxon
- sunflower
Helianthus annuuse0 - Outcome
- aggressivee0
- Direction
- more aggressivee0
- Comparator
- those collected from soybeane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isolates collected from sunflower plants were more aggressive than those collected from soybean”
Claim · model-written summary
Aggressiveness was positively correlated with colony radial growth.
- Taxon
- soybeanGlycine maxe1
- Outcome
- Aggressivenesse2
- Direction
- positively correlatede2
- Qualifier
- colony radial growthe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e2“Aggressiveness was positively correlated to colony radial growth”
Claim · model-written summary
Principal component analysis identified a main central group of isolates and two other smaller groups.
- Taxon
- soybeanGlycine maxe1
- Outcome
- group of isolatese2
- Value
- two other smaller groupse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e2“a main central group of isolates and two other smaller groups”
Claim · model-written summary
Main contributors to the total variance were the percentages of large sclerotia, the dry weight per sclerotium and the percentages of medium and small sclerotia.
- Taxon
- soybeanGlycine maxe1
- Outcome
- Main contributors to the total variancee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields”
e2“Main contributors to the total variance were the percentages of large sclerotia, the dry weight per sclerotium and the percentages of medium and small sclerotia”