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| DOI: | 10.1094/PD-90-0146 |
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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PD-90-0146
Last checked: 11/28/2007
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Kaminski, John E.;
Dernoeden, Peter H.;
Mischke, Sue;
O'Neill, Nichole R. |
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| Author Affiliation: | Kaminski and Dernoeden: Department of Natural Resource Sciences and Landscape Architecture, University of Maryland, College Park, Maryland; Mischke and O'Neill: United States Department of Agriculture - Agricultural Research Service, Beltsville, Maryland |
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| Title: | Genetic diversity among Ophiosphaerella agrostis strains causing dead spots in creeping bentgrass |
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| Section: | Research
Other records with the "Research" Section
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| Source: | Plant Disease. Vol. 90, No. 2, February 2006, p. 146-154. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Fall spot of bentgrass; Bermudagrass dead spot; Ophiosphaerella agrostis; Sexual reproduction; Phylogeny; Disease evaluation; Disease susceptibility; Color evaluation; Genetic diversity; Agrostis stolonifera; Disease profile
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| Abstract/Contents: | "Dead spot (Ophiosphaerella agrostis is a relatively new disease of young creeping bentgrass and hybrid bermudagrass putting greens in the United States. Little is known about the biology or genetic diversity of the pathogen. O. agrostis is unusual in that it produces prodigious numbers of pseudothecia in the field throughout the summer months and has no known asexual state. A total of 77 O. agrostis isolates were collected from 21 different bentgrass putting greens and one hybrid bermudagrass green in 11 states. DNA fingerprint analysis revealed that 78 out of 97 markers were polymorphic (80.4%), providing 57 unique profiles. Genetic variation of O. agrostis was diverse, and isolates separated into three distinct clades with ā„69% similarity. Analysis of molecular variance indicated that the geographic origins of the isolates and the ability to produce pseudothecia were the best indicators for genetic similarity among O. agrostis isolates. Colony color varied among the isolates, but generally was similar for isolates residing within two clades (B and C). Colony color of isolates within clade A appeared to be a mixture of the colony colors exhibited by clades B and C. Isolates examined within each clade generally had varying levels of pseudothecia production and varying colony colors when grown on PDA. Although O. agrostis is a homothallic species, it is unclear if outcrossing among strains occurs." |
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| Language: | English |
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| References: | 32 |
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| Note: | Pictures, color
Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaminski, J. E., P. H. Dernoeden, S. Mischke, and N. R. O'Neill. 2006. Genetic diversity among Ophiosphaerella agrostis strains causing dead spots in creeping bentgrass. Plant Dis. 90(2):p. 146-154. |
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| DOI: 10.1094/PD-90-0146 |
| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PD-90-0146
Last checked: 11/28/2007
Requires: PDF Reader |
| 
MSU catalog number: SB 599 .P95 |
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