Population Genetic Analyses of Fusarium asiaticum Populations from Barley Suggest a Recent Shift Favoring 3ADON Producers in Southern China

被引：77

作者：

Zhang, H. ^{[1
]}

Zhang, Z. ^{[1
]}

van der Lee, T. ^{[2
]}

Chen, W. Q. ^{[1
]}

Xu, J. ^{[1
]}

Xu, J. S. ^{[1
]}

Yang, L. ^{[3
]}

Yu, D. ^{[3
]}

Waalwijk, C. ^{[2
]}

Feng, J. ^{[1
]}

机构：

[1] Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

[2] Plant Res Int BV, NL-6700 AA Wageningen, Netherlands

[3] Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Wuhan 430064, Peoples R China

来源：

PHYTOPATHOLOGY | 2010年 / 100卷 / 04期

关键词：

genetic variation; HEAD BLIGHT PATHOGEN; GIBBERELLA-ZEAE; GRAMINEARUM CLADE; UNITED-STATES; WHEAT SCAB; CHEMOTYPES; DIVERSITY; DEOXYNIVALENOL; CULMORUM; MARKERS;

D O I：

10.1094/PHYTO-100-4-0328

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Fusarium asiaticum is the predominant causal agent of Fusarium head blight (FHB) in southern China. The genetic diversity was assessed by analyzing 448 single-spore F. asiaticum isolates from 18 sampling sites that were 10 to 2,000 kin apart, using seven highly informative variable number of tandem repeat (VNTR) markers. This analysis showed a significant degree of population subdivision (P < 0.001) among populations from upper, middle, and lower valleys of the Yangtze River, with little gene flow (Nm = 1.210). We observed a strong association between this genetic Population subdivision and the mycotoxin produced. Our results show that the dramatic cline in trichothecene chemotypes may be explained by a recent and significant invasion of 3-acetyldeoxynivalenol (3ADON) producers in FHB pathogen composition in the middle valley. Using Bayesian statistics, we found a biased gene flow from 3ADON to nivalenol (NIV) Populations. In addition, we observed significant genetic differentiation and linkage disequilibrium between NIV- and 3ADON-producing isolates at the same sampling sites. The impact of the changed agronomy and trade of cereal commodities on the spread of the new Fusarium population and the consequent increase of FHB observed in southern China are discussed.

引用

页码：328 / 336

页数：9

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