Variation Among Isolates of Fusarium graminearum Associated with Fusarium Head Blight in North Carolina | Zendy

Scott L. Walker | Zendy; S. Leath | Zendy; Winston M. Hagler | Zendy; J. Paul Murphy | Zendy

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Variation Among Isolates of Fusarium graminearum Associated with Fusarium Head Blight in North Carolina

Author(s) -

Scott L. Walker,

S. Leath,

Winston M. Hagler,

J. Paul Murphy

Publication year - 2001

Publication title -

plant disease

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.663

H-Index - 108

eISSN - 1943-7692

pISSN - 0191-2917

DOI - 10.1094/pdis.2001.85.4.404

Subject(s) - biology , fusarium , zearalenone , veterinary medicine , mycotoxin , cultivar , population , horticulture , agronomy , botany , medicine , demography , sociology

Fusarium head blight (FHB) can reduce yield of wheat and decrease the value of harvested grain by accumulation of detrimental toxins. Understanding the variability of the fungal population associated with infection could improve disease control strategies. Sixty-six isolates of Fusarium graminearum associated with FHB were collected in North Carolina and tested for in vitro growth rate, in vitro production of deoxynivalenol (DON) and zearalenone, and pathogenicity on three cultivars of soft red winter wheat. Significant differences among isolates were found for all three traits. Randomly Amplified Polymorphic DNA (RAPD) analysis revealed high levels of genotypic diversity among isolates. Isolates of F. graminearum, F. culmorum, and F. avenaceum acquired from the Pennsylvania State University Fusarium Center were included for comparison in all tests. In vivo levels of DON were measured for the five isolates associated with the highest levels of disease and the five isolates associated with the low...

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