scholarly journals Genetic diversity and mycelial compatibility groups of the plant-pathogenic fungus Sclerotinia sclerotiorum in Brazil

2011 ◽  
Vol 10 (2) ◽  
pp. 868-877 ◽  
Author(s):  
C.G. Litholdo Júnior ◽  
E.V. Gomes ◽  
M. Lobo Júnior ◽  
L.C.B. Nasser ◽  
S. Petrofeza
Keyword(s):  
Genetic Diversity ◽  
Sclerotinia Sclerotiorum ◽  
Pathogenic Fungus ◽  
Plant Pathogenic Fungus ◽  
Mycelial Compatibility

scholarly journals Mycelial compatibility and aggressiveness of Sclerotinia sclerotiorum isolates from Brazil and the United States

2014 ◽  
Vol 49 (4) ◽  
pp. 265-272 ◽  
Author(s):  
Lucimara Junko Koga ◽  
Charles Roger Bowen ◽  
Claudia Vieira Godoy ◽  
Maria Cristina Neves de Oliveira ◽  
Glen Lee Hartman
Keyword(s):  
United States ◽  
Genetic Diversity ◽  
Sclerotinia Sclerotiorum ◽  
Country Of Origin ◽  
The United States ◽  
Soybean Field ◽  
Soybean Cultivars ◽  
Mycelial Compatibility ◽  
The Usa ◽  
Midwest Region

The objective of this work was to evaluate the genetic diversity among Sclerotinia sclerotiorum isolates from Brazil and the USA, assess their aggressiveness variability, and verify the existence of an isolate-cultivar interaction. Isolate variability was determined by mycelial compatibility grouping (MCG), and isolate aggressiveness by cut-stem inoculations of soybean cultivars. Two experiments for MCGs and two for aggressiveness were conducted with two sets of isolates. The first set included nine isolates from the same soybean field in Brazil and nine from the Midwest region of the USA. The second set included 16 isolates from several regions of Brazil and one from the USA. In the first set, 18 isolates formed 12 different MCGs. In the second set, 81% of the isolates from Brazil grouped into a single MCG. No common MCGs were observed among isolates from Brazil and the USA. The isolates showed aggressiveness differences in the first set, but not in the second. Although aggressiveness differed in the first set, soybean cultivars and isolates did not interact significantly. Cultivar rank remained the same, regardless of the genetic diversity, aggressiveness difference, and region or country of origin of the isolate. Results from screening of soybean cultivars, performed by the cut-stem method in the USA, can be used as reference for researchers in Brazil.

scholarly journals Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka

Pathogens ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 306
Author(s):  
Thirega Mahalingam ◽  
Weidong Chen ◽  
Chandima Shashikala Rajapakse ◽  
Kandangamuwa Pathirannahalage Somachandra ◽  
Renuka Nilmini Attanayake
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Sri Lanka ◽  
Sclerotinia Sclerotiorum ◽  
Genetic Recombination ◽  
Multiple Infections ◽  
Tropical Country ◽  
High Genetic Diversity ◽  
Principal Coordinates ◽  
Mycelial Compatibility

Sclerotinia sclerotiorum is an important fungal pathogen on many economically important crops including cabbage worldwide. Even though population structure and genetic diversity of S. sclerotiorum is well studied in temperate climatic conditions, only a few studies have been conducted in tropical countries. It is also not clear whether the populations are clonal or recombining in the tropics. In filling this information gap, 47 isolates of S. sclerotiorum were collected from commercial cabbage (Brassica oleracea L.) fields in Nuwara Eliya district of Sri Lanka, where the disease has been previously reported. All the isolates were subjected to genetic diversity study using mycelial compatibility grouping and microsatellite markers. Fourteen mycelial compatibility groups (MCGs) and 23 multilocus haplotypes (MLHs) were recorded. Mean expected heterozygosity of the population was 0.56. MLHs were weakly correlated with MCGs. Population genetic structure analysis and principal coordinates identified three genetic clusters. Genetic recombination was inferred within each genetic cluster when isolates were subjected to clone correction. There was evidence of multiple infections on single plant as detected by the presence of more than one MCG on each cabbage plant. However, multiple infections did not increase the disease severity in detached leaf assay. We found high genetic diversity and recombination of S. sclerotiorum population in a tropical country, Sri Lanka. Importance of detecting genetic structure when inferring recombination was also highlighted.

Clonal dispersal and spatial mixing in populations of the plant pathogenic fungus, Sclerotinia sclerotiorum

1995 ◽  
Vol 4 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Y. Kohli ◽  
L. J. Brunner ◽  
H. YOELL ◽  
M. G. Milgroom ◽  
J. B. Anderson ◽  
...  
Keyword(s):  
Sclerotinia Sclerotiorum ◽  
Pathogenic Fungus ◽  
Plant Pathogenic Fungus

Virulence of Sclerotinia sclerotiorum and S. minor on Dandelion (Taraxacum officinale)

Weed Science ◽  
1991 ◽  
Vol 39 (1) ◽  
pp. 109-118 ◽  
Author(s):  
Gordon E. Riddle ◽  
Lee L. Burpee ◽  
Gregory J. Boland
Keyword(s):  
Sclerotinia Sclerotiorum ◽  
Perennial Ryegrass ◽  
Pathogenic Fungus ◽  
Creeping Bentgrass ◽  
Kentucky Bluegrass ◽  
Taraxacum Officinale ◽  
Controlled Environment ◽  
Annual Bluegrass ◽  
Plant Pathogenic Fungus ◽  
Positive Correlations

Sixty isolates of the plant pathogenic fungus Sclerotinia sclerotiorum (Lib.) de Bary and six isolates of Sclerotinia minor Jagger were evaluated in a controlled environment for virulence on leaves excised from 8-week-old dandelion plants. Significant negative correlations were obtained between the relative virulence of the isolates and the dry weights of dandelion plants inoculated in a controlled environment; and positive correlations were detected between the relative virulence of isolates and reduction in number of dandelion plants in turfgrass swards infested with inoculum of the isolates. In August 1988, an 80.7% reduction in the number of dandelion plants was detected in a turfgrass sward treated in 1987 with four applications of heat-killed seed of perennial ryegrass (100 g m−2 application–1) infested with isolate R30 of S. sclerotiorum, followed by six applications at the same rate in 1988. Populations of dandelions in untreated swards increased by 22.2% during the same period. Heat-killed seed of perennial ryegrass (100 g m−2) infested with isolate R30 applied simultaneously with dandelion seed (25 g m−2) onto a sward of Kentucky bluegrass reduced the establishment of dandelion seedlings by 85.5%. Necrosis or discoloration did not develop on Kentucky bluegrass, creeping bentgrass, annual bluegrass, or quackgrass treated with inoculum of Sclerotinia. Sclerotia of Sclerotinia spp. were found, on occasion, in crowns but not on the foliage of diseased dandelions.

scholarly journals A whole genome scan of SNP data suggests a lack of abundant hard selective sweeps in the genome of the broad host range plant pathogenic fungus Sclerotinia sclerotiorum

PLoS ONE ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. e0214201 ◽  
Author(s):  
Mark Charles Derbyshire ◽  
Matthew Denton-Giles ◽  
James K. Hane ◽  
Steven Chang ◽  
Mahsa Mousavi-Derazmahalleh ◽  
...  
Keyword(s):  
Host Range ◽  
Sclerotinia Sclerotiorum ◽  
Pathogenic Fungus ◽  
Genome Scan ◽  
Broad Host Range ◽  
Whole Genome ◽  
Selective Sweeps ◽  
Plant Pathogenic Fungus ◽  
Snp Data ◽  
Whole Genome Scan
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