Species and Trichothecene Genotype of Pathogens Causing Fusarium Head Blight of Wheat in Nebraska, U.S.A.

Esteban Valverde-Bogantes, Andreia Bianchini, Stephen N. Wegulo, Heather E. Hallen-Adams

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Fusarium head blight (FHB) is an economically important disease caused by several Fusarium species affecting wheat and other small grain cereals. In recent years, reports of shifts in populations of FHB pathogens around the world have shown that these populations are dynamic and change continuously, often resulting in increased yield losses or changes in the mycotoxins pro duced in the grain, which highlights the need for increased vigilance. The objective of this research was to identify the species and trichothecene genotypes of FHB pathogens in Nebraska in order to monitor their populations and the major toxigenic risks in the state. A total of 74 single-spore Fusarium isolates were obtained from 42 FHB-symptomatic wheat spikes collected from Nebraska fields during the growing seasons in 2015 to 2018. Most of the isolates were identified as F. graminearum (n 5 67) based on translation elongation factor 1a (TEF1),trichothecene 3-O-acetyltransferase (TRI101), and reductase (RED) sequences. Additional species included F. boothii (n 5 3), F. poae (n 5 2), F. acuminatum (n 5 1), and one isolate was an F. graminearum × F. boothii interspecific hybrid. All F. graminearum and F. boothii isolates had the 15-ADON trichothecene genotype. This study shows that F. graminearum is not the only pathogen causing FHB in Nebraska and helps expand knowledge on the worldwide distribution of F. boothii.

Original languageEnglish (US)
Pages (from-to)509-515
Number of pages7
JournalPlant Health Progress
Issue number4
StatePublished - 2021


  • 15-adon
  • Fusarium boothii
  • Fusarium graminearum
  • Plant disease
  • Wheat

ASJC Scopus subject areas

  • Plant Science
  • Horticulture


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