Full TGIF Record # 134432
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Web URL(s):http://turf.rutgers.edu/research/abstracts/symposium2008.pdf
    Last checked: 11/05/2015
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Publication Type:
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Report
Content Type:Abstract or Summary only
Author(s):Crouch, Jo Anne; Clarke, Bruce B.; Hillman, Bradley I.
Author Affiliation:Department of Plant Biology and Pathology, Rutgers University, New Brunswick, New Jersey
Title:Ecological specialization drives the evolution of the turfgrass anthracnose fungus Colletotrichum cereale across diverse grass communities
Section:Plenary presentations
Other records with the "Plenary presentations" Section
Meeting Info.:New Brunswick, NJ: January 10-11, 2008
Source:Proceedings of the Seventeenth Annual Rutgers TurfgrassSymposium. 2008, p. 28.
Publishing Information:New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey
# of Pages:1
Keywords:TIC Keywords: Colletotrichum graminicola; Evolution; Disease profile; Anthracnose; Biodiversity; Genetic diversity
Abstract/Contents:"Emerging infectious diseases represent one of the greatest threats to both cultivated and natural plant communities, threatening food production, wildlife habitats and biodiversity conservation. Over the past decade, the emergence of anthracnose disease has challenged the health of North American golf course turfgrasses, resulting in considerable economic loss. The fungus responsible for the outbreaks,Colletotrichum cereale, has also been isolated from numerous natural grasses and cereal crops, although disease symptoms are generally absent. Here we utilize phylogenetic and population genetic analyses to determine the role of ecosystem in the advancement of turfgrass anthracnose and assess whether natural grass and/or cereal inhabitants are implicated in the epidemics. We find that the graminicolous Colletotrichum diverged from an ancestral population into two lineages correlated with host physiology (C3 or C4). In the C4 lineage, which includes the important cereal pathogens C. graminicola, C. sublineolum, C. falcatum, C. caudatum and nine novel species, host specialization predominates. In contrast, although the C3 lineage -- C. cereale -- is comprised of just one species with a wide host-range , it is divided into ten highly specialized populations derived from a generalist founder population. Extreme differentiation between locally-adapted populations suggests that asymptomatic grasses are unlikely reservoirs of infectious disease propagules, but gene flow between the generalist founder population and specialized genotypes provides a mechanism for genetic exchange between otherwise isolated populations. These findings demonstrate that while disease occurrence and spread is currently localized to the turfgrass environment, introgression between C. cereale ecotypes can lead to the expansion of anthracnose disease into new ecosystems."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Crouch, J. A., B. B. Clarke, and B. I. Hillman. 2008. Ecological specialization drives the evolution of the turfgrass anthracnose fungus Colletotrichum cereale across diverse grass communities. Proc. Annu. Rutgers Turfgrass Symp. p. 28.
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Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2008.pdf
    Last checked: 11/05/2015
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 433 .R88
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