Journal of Phytopathology (2012) 160, 519-524

Mbacke Ndoye, Jing-Bo Zhang, Jian-Hua Wang, An-Dong Gong, He-Ping Li, Bo Qu, ShaO-Jun Li and Yu-Cai Liao (2012)
Nivalenol and 15-acetyldeoxynivalenol chemotypes of Fusarium graminearum clade species are prevalent on maize throughout China
Journal of Phytopathology 160 (10), 519-524
Abstract: Fusarium graminearum clade species are among the main causative agents of Gibberella ear rot (GER) in maize and responsible for the various trichothecene mycotoxins accumulated in contaminated maize grains. In this study, a total of 620 isolates from diseased maize ears collected from 59 districts in 19 provinces throughout China, previously identified morphologically as Fusarium graminearum clade, was genetically characterized at the species level based on SCAR (Sequence Characterized Amplified Region) and for their potential capability of mycotoxin production using the genetic chemotyping assay. The results showed that 359 isolates were F. asiaticum (SCAR 5), which consisted of 97% nivalenol (NIV)-chemotypes, 0.8% 3-acetyldeoxynivalenol (3-ADON)-producing isolates and 2.2% 15-acetyldeoxynivalenol (15-ADON) producers, whereas the remaining 261 isolates were identified as F. graminearum sensu stricto (SCAR 1), all of which produced 15-ADON mycotoxins. This high proportion of NIV producers present in F. asiaticum is different from the chemotype patterns in F. asiaticum populations isolated from wheat and barley, where DON and its acetylated chemotypes were the predominant mycotoxins. Moreover, the majority of NIV producers (59.1%) and all the 3-ADON-producing strains were derived from the warmer regions in southern China, whereas most of the 15-ADON-producing strains (78.4%) were isolated from the colder regions in northern China. Our study is the first report of NIV chemotypes of F. asiaticum and 15-ADON chemotypes of F. graminearum sensu stricto that were associated with the GER of maize in China.
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Link to article at publishers website
Database assignments for author(s): Yu-Cai Liao

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium graminearum	Maize/corn (Zea mays)	China (south)
	Fusarium graminearum	Maize/corn (Zea mays)	China (NE)
	Fusarium asiaticum	Barley (Hordeum vulgare)
	Fusarium asiaticum	Maize/corn (Zea mays)	China (south)
	Fusarium asiaticum	Wheat (Triticum)