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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2006.pdf#page=35
Last checked: 11/26/2007
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Crouch, JoAnne;
Wong, Frank;
Tredway, Lane P.;
Hsiang, Tom;
Clarke, Bruce B.;
Hillman, Bradley I. |
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| Author Affiliation: | Crouch: Department of PLant Biology and Pathology, Rutgers University; Wong: Department of Plant Pathology, University of California Riverside; Tredway: Department of Plant Pathology North Carolina State University; Hsian: Department of Environmental Biology, University of Guelph, Ontario, Canada ; Clarke: Department of Plant Biology and Pathology, Rutgers University; Hillman: Department of Plant Biology and Pathology, Rutgers University |
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| Title: | Assesing population structure among divergent lineages of colletotrichum cereale pathogenic to cool-season turf grass species in North America |
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| Section: | Posters
Other records with the "Posters" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 12-13, 2006 |
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| Source: | Proceedings of the Fifteenth Annual Rutgers Turfgrass Symposium. 2006, p. 34-35. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Colletotrichum graminicola; Anthracnose; Cool season turfgrasses; Disease profile; Genetic diversity; Geographical distribution; Simple sequence repeats; Pathogens
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| Geographic Terms: | North America |
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| Abstract/Contents: | "Colletotrichum cereal (formerly known as C. graminicola [2]) is a filamentous fungus that inhabits a wide range of cool-season grasses and causes anthracnose disease in turfgrass species, particularly Poa annua and Agrostis stolonifera. Although C. cereale was first described in association with members of the Pooideae grass family in 1909 (5), this organism was considered of no real consequence: it rarely if ever caused disease, and was generally limited to the northeastern part of the United States. The fungus was described intermittently throughout the 20th century, making transitory appearances in turf, rye, wheat, oats and orchardgrass (e.g. 1, 3, 4, 5, 6). Today, anthracnose disease on turf is presented in all parts of North America and since the early 1990's is considered one of the most significant threats to P. annua turf. Despite its increasing importance as a pathogen and the potential for far-reaching impacts to both natural and agro-ecosystems, surprisingly little is known about genetic diversity and geographic distribution within the species. In this collaborative study, we investigate C. cereale population structure and demographic history in turfgrass ecosystems by means of detailed spatial sampling of contemporary populations. An extensive culture collection of C. cereale, catalogued according to longitude and latitude coordinates, has been assembled from 97 strands of cultivated turf from the United States and Canada, with 530 strains currently in pure culture. Four main lineages of C. cereale have been recognized through multi-locus nucleotide sequence analysis, and a single haplotype has been identified as the ancestral genotype for the numerically dominant lineage in North America (2). A set of novel simple sequence repeat (SSR) markers (microsatellites) has been developed using a hybrid capture protocol to generate hypervariable geotypic data for fine-scale population analyses: 54 SSR loci have been identified, and primer pairs from 21 polymorphic loci have been readied. Using traditional measures of population diversity, Bayesian estimates of population subdivision and coalescent-based analyses of microsatellite variation, this research assesses effective population size, migration, patterns of dispersal and local demes, recombination rates and gene flow across the four extant C. cereale lineages. The results from this study will be compared to similar data drawn from a sample of ~800 C. cereale strains collected from cool-season grass species in 18 prairie grasslands and 15 wheat fields across seven states, providing an excellent contrast of pathogenic vs. non-pathogenic C. cereale population structure. This detailed examination of C. cereale in turf, cereal crops and natural grassland communities will significantly advance our understanding of how this important pathogen is distributed across North America." |
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| Language: | English |
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| References: | 6 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wong, F., L. P. Tredway, T. Hsiang, B. B. Clarke, B. I. Hillman, and J. Crouch. 2006. Assesing population structure among divergent lineages of colletotrichum cereale pathogenic to cool-season turf grass species in North America. Proc. Annu. Rutgers Turfgrass Symp. p. 34-35. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2006.pdf#page=35
Last checked: 11/26/2007
Requires: PDF Reader |
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MSU catalog number: SB 433 .R88 |
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