Sexual recombination of carbendazim resistance in <i>Fusarium graminearum</i> under field conditions

Chen, Yu; Zhou, Mingguo

doi:10.1002/ps.1704

Cited by 25 publications

(14 citation statements)

References 26 publications

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“…It has been found that genetic diversity of isolates sampled from maize is even higher than for those sampled from wheat (Naef and Défago 2006). Recently, Chen and Zhou (2009) firstly confirmed sexual crossing of F. graminearum s.s. in the field experimentally with outcrossing rates of 6-20%.…”

Section: Discussionmentioning

confidence: 79%

Diversity in genetic structure and chemotype composition of Fusarium graminearum sensu stricto populations causing wheat head blight in individual fields in Germany

2011

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Fusarium head blight (FHB) is one of the most destructive diseases of wheat. Twelve small commercial wheat fields (size 1-3 hectares) were sampled in Germany for Fusarium populations at three spots per field with 10 heads each. PCR assays using generic primers confirmed 338 isolates as F. graminearum sensu stricto (s.s.) (64.9%) out of 521 Fusarium spp. that were further analyzed. Populations of F. graminearum s.s. in Germany contain three types of trichothecenes with a dominancy of 15-acetyldeoxynivalenol chemotype (92%) followed by 3-acetyldeoxynivalenol chemotype (6.8%) and a few isolates of nivalenol chemotype (1.2%). All these isolates were genotyped using 19 microsatellite loci. The 12 populations showed a high genetic diversity within the small scale sampling areas resulting in 300 different haplotypes. Genetic diversity within populations (71.2%) was considerably higher than among populations (28.8%) as shown by analysis of molecular variance. Gene flow (Nm) between populations ranged from 0.76-3.16. Composition of haplotypes of one population followed over 2 years changed considerably. No correlation between genetic and geographical distance was found. In conclusion, populations of F. graminearum s.s. in Germany display a tremendous genetic variation on a local scale with a restricted diversity among populations.

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Section: Discussionmentioning

confidence: 79%

Diversity in genetic structure and chemotype composition of Fusarium graminearum sensu stricto populations causing wheat head blight in individual fields in Germany

2011

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“…Of the three BIOs, BIO III exhibited the lowest PDI of Fusarium wilt and higher (p < 0.05) biocontrol efficacy than Carbendazim. A high dose of the fungicide in the experiment showed little effect on Fusarium wilt control, perhaps because the successive applications of Hymexazol and Carbendazim in the previous seasons of cucumber plantings (data not shown) caused pathogen resistance (Chen and Zhou, 2009). The biocontrol efficacy of Trichoderma spp.…”

Section: Biocontrol Efficacy Of the Biosmentioning

confidence: 96%

Solid-state fermentation of agro-industrial wastes to produce bioorganic fertilizer for the biocontrol of Fusarium wilt of cucumber in continuously cropped soil

Chen

Yang

Raza

et al. 2011

Bioresource Technology

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“…This extremely high genetic diversity could be interpreted as evidence for sexual recombination (Goswami and Kistler 2004). This was recently confirmed by high outcrossing frequencies between 5.7 and 20.9%, demonstrating sexual recombination occurring under field conditions in China (Chen and Zhou 2009).…”

Section: Introductionmentioning

confidence: 62%

Competitive Aggressiveness in Binary Mixtures of Fusarium graminearum and F. culmorum Isolates Inoculated on Spring Wheat with Highly Effective Resistance QTL

Ohe

Miedaner

2010

Journal of Phytopathology

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Competitive Aggressiveness in Binary Mixtures of Fusarium graminearum and F. culmorum Isolates Inoculated on Spring Wheat with Highly Effective Resistance QTL Christiane hristiane Von der on der Ohe he and Thomas homas Miedaner iedaner AbstractFusarium head blight (FHB) caused by Fusarium graminearum and F. culmorum is a devastating disease with high effects on grain yield and quality. We developed spring wheat lines incorporating the highly effective FHB resistance quantitative trait loci (QTL) Fhb1 and Qfhs.ifa-5A. Whether these QTL lead to competition within Fusarium populations in the field resulting in isolates with higher aggressiveness has not been analysed. The aims of this study were to determine (i) the aggressiveness potential of F. graminearum and F. culmorum isolates, (ii) competition effects of these isolates in binary mixtures and (iii) the stability of resistant hosts. Six F. graminearum, two F. culmorum isolates and seven binary mixtures containing these isolates were tested for their aggressiveness and mycotoxin production at two locations in South Germany in 2007 and 2008. Host lines were four spring wheat lines containing the resistance QTL Fhb1 and ⁄ or Qfhs.ifa-5A or none of them and one standard variety. Re-isolates were sampled from plots inoculated with the binary mixtures to identify the percentage of each isolate in the mixture by simple sequence repeat markers. Resistant host lines reacted as expected and had a high stability to all isolates and mixtures. Only less important host · mixture interactions were detected. Aggressiveness among isolates and mixtures was significantly different. Type and amount of mycotoxin and high single isolate aggressiveness were not necessarily advantageous in the mixture. However, both F. culmorum isolates outcompeted F. graminearum isolates. Significant deviations from the inoculated 1 : 1 proportions occurred in 34 of 49 cases, illustrating that competition effects appeared in the mixtures. These differences depended mainly on the year and not on the level of host resistance. We conclude that resistance should not be affected by the Fusarium isolates and mixtures.

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Sexual recombination of carbendazim resistance in Fusarium graminearum under field conditions

Abstract: Outcrossing between carbendazim-sensitive and -resistant isolates did occur under field conditions, and sexual recombination must play a role in the development of carbendazim resistance in the field.

Cited by 25 publications

References 26 publications

Diversity in genetic structure and chemotype composition of Fusarium graminearum sensu stricto populations causing wheat head blight in individual fields in Germany

Diversity in genetic structure and chemotype composition of Fusarium graminearum sensu stricto populations causing wheat head blight in individual fields in Germany

Solid-state fermentation of agro-industrial wastes to produce bioorganic fertilizer for the biocontrol of Fusarium wilt of cucumber in continuously cropped soil

Competitive Aggressiveness in Binary Mixtures of Fusarium graminearum and F. culmorum Isolates Inoculated on Spring Wheat with Highly Effective Resistance QTL

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