Key Laboratory of Control Technology and Standard for Agro product Safety and Quality Nanjing

Nanjing, China

Key Laboratory of Control Technology and Standard for Agro product Safety and Quality Nanjing

Nanjing, China
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Qiu J.,Jiangsu Academy of Agricultural Sciences | Qiu J.,Key Laboratory of Control Technology and Standard for Agro product Safety and Quality Nanjing | Qiu J.,Collaborative Innovation Center for Modern Grain Circulation and Safety | Qiu J.,Key Laboratory of Food Quality and Safety of Jiangsu Province State Key Laboratory Breeding Base | And 16 more authors.
Journal of the Science of Food and Agriculture | Year: 2016

BACKGROUND: The Fusarium graminearum species complex infects several cereals and causes the reduction of grain yield and quality. Many factors influence the extent of Fusarium infection and mycotoxin levels. Such factors include crop rotation. In the present study, we explored the effect of rice or maize as former crops on mycotoxin accumulation in wheat grains. RESULTS: More than 97% of samples were contaminated with deoxynivalenol (DON). DON concentrations in wheat grains from rice and maize rotation fields were 884.37 and 235.78 µg kg−1. Zearalenone (ZEN) was detected in 45% of samples which were mainly collected from maize–wheat rotation systems. Fusarium strains were isolated and more F. graminearum sensu stricto (s. str.) isolates were cultured from wheat samples obtained from maize rotation fields. DON levels produced by Fusarium isolates from rice rotation fields were higher than those of samples from maize rotation fields. CONCLUSIONS: Rice–wheat rotation favours DON accumulation, while more ZEN contamination may occur in maize–wheat rotation models. Appropriate crop rotation may help to reduce toxin levels in wheat grains. © 2016 Society of Chemical Industry. © 2016 Society of Chemical Industry


Qiu J.,Key Laboratory of Food Quality and Safety of Jiangsu Province | Qiu J.,Key Laboratory of Control Technology and Standard for Agro product Safety and Quality Nanjing | Qiu J.,Collaborative Innovation Center for Modern Grain Circulation and Safety | Qiu J.,Key Laboratory of Agro product Safety Risk Evaluation Nanjing | And 17 more authors.
European Journal of Plant Pathology | Year: 2015

In 2012, we isolated mycotoxigenic fungi from maize kernels sourced in Jiangsu and Anhui provinces, China. Fusarium spp. accounted for most isolates detected, followed by Aspergillus and Penicillium spp. Of the Fusarium species, Fusarium verticillioides was the most prevalent, as revealed by direct PCR of DNA from kernel samples, followed by F. proliferatum and F. graminearum. Most F. verticillioides strains contained the FUM1 gene, the product of which plays a key role in fumonisin biosynthesis. In terms of mating type idiomorphs, about 80 % of all strains carried the MAT-1 allele, and 20 % carried MAT-2. The genetic structures of 192 representative F. verticillioides isolates were determined via an analysis of eight simple sequence repeat markers. This analysis revealed high-level gene diversity but low linkage disequilibrium in three populations grouped by the geographical areas in which they were collected. The three populations exhibited low-level genetic differentiation and high gene flow, indicating that geographical differences minimally influenced population differentiation; all three populations were potentially components of a larger, randomly mating population. © 2015, Koninklijke Nederlandse Planteziektenkundige Vereniging.

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