Publications by authors named "Gong Qiang Yang"

2 Publications

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The distribution of Fusarium graminearum and F. asiaticum causing Fusarium head blight of wheat in relation to climate and cropping system.

Plant Dis 2021 Apr 21. Epub 2021 Apr 21.

Henan Academy of Agricultural SciencesZhengzhou , China, 450002;

In the main wheat production area of China (The Huang Huai Plain, HHP), both Fusarium graminearum and F. asiaticum, the causal agents of Fusarium head blight (FHB), are present. We investigated whether the relative prevalence of F. graminearum and F. asiaticum is related to cropping systems and/or climate factors. A total of 1844 Fusarium isolates were obtained from 103 fields of two cropping systems: maize-wheat and rice-wheat rotations. To maximize the differences in climatic conditions, isolates were sampled from the north and south HHP region. Based on the phylogenetic analysis of EF-1α and Tri101sequences, 1207 of the 1844 isolates belonged to F. graminearum, and the remaining 637 isolates belonged to F. asiaticum. The former was predominant in the northern region: 1022 of the 1078 Fusarium isolates in the north were F. graminearum. The latter was predominant in the southern region: 581 of the 766 Fusarium isolates belonging to F. asiaticum. Analysis based on generalised linear modelling, the relative prevalence of the two species was associated more with climatic conditions than with the cropping system. Fusarium graminearum was associated with drier conditions, cooler conditions during the winter but warmer conditions in the infection and grain-colonization period, and with the maize-wheat rotation. The opposite was true for F. asiaticum. Except 15-ADON, the trichothecene chemotype composition of F. asiaticum differed between the two cropping systems. The 3-ADON was more prevalent in the maize-wheat rotation; whereas NIV more prevalent in the rice-wheat rotation. The results also suggested that environmental conditions in the overwintering period appeared to be more important than that in the infection and grain-colonization and pre-anthesis sporulation periods in affecting the relative prevalence of F. graminearum and F. asiaticum. More research is needed to study the effect of overwintering conditions on subsequent epidemic in the following spring.
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http://dx.doi.org/10.1094/PDIS-01-21-0013-REDOI Listing
April 2021

Analysis of Fusarium graminearum Species Complex from Wheat-Maize Rotation Regions in Henan (China).

Plant Dis 2017 May 16;101(5):720-725. Epub 2017 Feb 16.

Plant Protection Institute, Henan Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China/Henan Key Laboratory of Crop Pest Control, Zhengzhou 450002, China.

Fusarium head blight (FHB) and maize stalk rot (MSR), caused by members of the Fusarium graminearum species complex (FGSC), are among the most destructive and economically important diseases in the world. Species identity and the trichothecene chemotype of 312 members of the FGSC from diseased wheat spikes and maize stalks in Henan was determined using phylogenetic analyses and a polymerase chain reaction trichothecene chemotype assay. F. graminearum sensu stricto accounted for more than 93% of the FGSC isolates associated with FHB (N = 168) and MSR (N = 130). The remaining isolates were F. asiaticum. Significant differences were found in the frequencies of the two species within the hosts (P < 0.01). However, the frequencies of the same species in FHB and MSR were similar (P > 0.05) for wheat and maize isolates, indicating that the composition of the FGSC with respect to wheat and maize in these fields varied little. The 15-acetyl-deoxynivalenol (15-ADON) trichothecene chemotype represented 92.7 and 98.5% of isolates from wheat (N = 167) and maize (N = 130), respectively. However, the 3-acetyl-deoxynivalenol chemotype was found in 6.7% of wheat isolates, and the nivalenol chemotype in 1.5% of MSR isolates and in 0.6% of FHB isolates. Mycelial growth at different concentrations of carbendazim and difenoconazole did not differ between F. graminearum sensu stricto and F. asiaticum. These results suggest that the 15-ADON chemotype of F. graminearum sensu stricto is the predominant pathogen that causes wheat- and maize-related diseases in this region. Copyright © 2017 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .
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http://dx.doi.org/10.1094/PDIS-06-16-0912-REDOI Listing
May 2017