Association between yield loss and Fusarium head blight traits in resistant and susceptible winter wheat cultivars

Progression of deoxynivalenol (DON) concentrations in spikes and kernels was studied in relation to Fusarium head blight (FHB) symptoms in five winter wheat cultivars, differing in resistance to FHB, after single floret inoculation with an aggressive isolate of Fusarium culmorum. After inoculation in field conditions the spikes were detached from the plant and kept in the greenhouse under controlled conditions. High concentrations of DON were detected in susceptible cultivars at an early stage of pathogenesis (7 days after inoculation). Over the whole examined 21-day period and also at maturity spikes contained more DON than kernels. While differences between cultivars in the accumulation of DON were highly expressed already 7 days after inoculation, differences in symptomatic reactions were not clear until day 21. Owing to the reported crucial role of DON at early stages of pathogenesis, the importance of appropriate timing of fungicide application is highly stressed.  

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Meta-Analysis of Regression Coefficients for the Relationship Between Fusarium Head Blight and Deoxynivalenol Content of Wheat

Phytopathology ◽

10.1094/phyto-96-0951 ◽

2006 ◽

Vol 96 (9) ◽

pp. 951-961 ◽

Cited By ~ 64

Author(s):

P. A. Paul ◽

P. E. Lipps ◽

L. V. Madden

Keyword(s):

Winter Wheat ◽

Fusarium Head Blight ◽

Spring Wheat ◽

Meta Analysis ◽

Regression Coefficients ◽

Wheat Cultivars ◽

Head Blight ◽

Regression Slope ◽

Winter Wheat Cultivars ◽

The Relationship

A total of 126 field studies reporting deoxynivalenol (DON; ppm) content of harvested wheat grain and Fusarium head blight index (IND; field or plot-level disease severity) were analyzed to determine the overall mean regression slope and intercept for the relationship between DON and IND, and the influence of study-specific variables on the slope and intercept. A separate linear regression analysis was performed to determine the slope and intercept for each study followed by a meta-analysis of the regression coefficients from all studies. Between-study variances were significantly (P < 0.05) greater than 0, indicating substantial variation in the relationship between the variables. Regression slopes and intercepts were between -0.27 and 1.48 ppm per unit IND and -10.55 to 32.75 ppm, respectively. The overall mean regression slope and intercept, 0.22 ppm per unit IND and 2.94 ppm, respectively, were significantly different from zero (P < 0.001), and the width of the 95% confidence interval was 0.07 ppm per unit IND for slope and 1.44 ppm for intercept. Both slope and intercept were significantly affected by wheat type (P < 0.05); the overall mean intercept was significantly higher in studies conducted using winter wheat cultivars than in studies conducted using spring wheat cultivars, whereas the overall mean slope was significantly higher in studies conducted using spring wheat cultivars than in winter wheat cultivars. Study location had a significant effect on the intercept (P < 0.05), with studies from U.S. winter wheat-growing region having the highest overall mean intercept followed by studies from Canadian wheat-growing regions and U.S. spring wheat-growing regions. The study-wide magnitude of DON and IND had significant effects on one or both of the regression coefficients, resulting in considerable reduction in between-study variances. This indicates that, at least indirectly, environment affected the relationship between DON and IND.

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QTL Mapping of Fusarium Head Blight Resistance in Winter Wheat Cultivars ‘Art’ and ‘Everest’

Crop Science ◽

10.2135/cropsci2018.04.0276 ◽

2019 ◽

Vol 59 (3) ◽

pp. 911-924 ◽

Cited By ~ 2

Author(s):

Marshall A. Clinesmith ◽

Allan K. Fritz ◽

Cristiano Lemes da Silva ◽

William W. Bockus ◽

Jesse A. Poland ◽

...

Keyword(s):

Winter Wheat ◽

Qtl Mapping ◽

Fusarium Head Blight ◽

Fusarium Head Blight Resistance ◽

Blight Resistance ◽

Wheat Cultivars ◽

Head Blight ◽

Winter Wheat Cultivars

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Field resistance of Martonvásár winter wheat cultivars against Fusarium head blight

Acta Agronomica Hungarica ◽

10.1556/aagr.52.2004.4.4 ◽

2005 ◽

Vol 52 (4) ◽

pp. 351-359 ◽

Cited By ~ 2

Author(s):

K. Puskás ◽

G. Vida ◽

J. Komáromi ◽

O. Veisz ◽

Z. Bedő

Keyword(s):

Winter Wheat ◽

Fusarium Head Blight ◽

Yield Components ◽

Kernel Weight ◽

Field Resistance ◽

Test Weight ◽

Wheat Cultivars ◽

Head Blight ◽

Winter Wheat Cultivars ◽

Fhb Resistance

Fifty Triticum aestivum genotypes, including winter wheat cultivars from Martonvásár, were tested for fusarium head blight (FHB) resistance under artificially inoculated conditions. Field resistance, kernel infection, and the relative yield components (test weight, thousand kernel weight and kernel weight/heads) were examined following infection with Fusarium graminearum and F. culmorum isolates. Using data from two years, a number of Martonvásár varieties with above-average resistance to FHB were identified. On the basis of field infection, AUDPC values close to those of resistance sources were calculated for the variety Mv Emese, while 67.5% of the varieties tested had values which did not differ significantly from those of the control variety Arina. The yield components examined were modified substantially by artificial FHB infection. The thousand kernel weight and test weight of the variety exhibiting the greatest degree of infection were only 21.14% and 25.58%, respectively, of the untreated control. In one case the decline in the kernel weight/head was more than 90%. The results of multivariable statistical analysis indicated that among the Hungarian wheat genotypes, Bánkúti 1201, B9086-95 (a line derived from Bánkúti 1201), Mv Emese, Martonvásári4 and Mv Táltos could be grouped with the best sources of resistance. The experimental data revealed wide genetic variability for FHB resistance in the Martonvásár breeding stock.

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Evaluation of resistance to Fusarium head blight in wheat using different sources of inoculum

Czech Journal of Genetics and Plant Breeding ◽

10.17221/112/2011-cjgpb ◽

2011 ◽

Vol 47 (No. 4) ◽

pp. 131-139 ◽

Cited By ~ 4

Author(s):

V. Šíp ◽

J. Chrpová ◽

L. Štočková

Keyword(s):

Fusarium Head Blight ◽

Yield Components ◽

Yield Loss ◽

Wheat Cultivars ◽

Head Blight ◽

Spray Inoculation ◽

Symptom Scores ◽

Winter Wheat Cultivars ◽

Moderate Resistance ◽

Different Sources

The response of four winter wheat cultivars, differing in resistance to Fusarium head blight (FHB), to spray inoculation with four selected Fusarium graminearum isolates, mixture of these isolates and frequently used F. culmorum isolate B was studied in five field and glasshouse experiments during 2008–2010. Analyses of variance showed highly significant main and interaction effects of cultivar, inoculum source and environment (year-trial) on all five examined traits indicative of disease severity, yield loss and accumulation of mycotoxins. The relations between traits were not evidently influenced by the used isolate. Resistance of host genotypes and environmental conditions accounted for a greater proportion of the total variation (8–36%) than the inoculation source (isolate) that substantially influenced the accumulation of the mycotoxin deoxynivalenol (12%), but expressed relatively low effects on symptom scores, percentage of fusarium damaged kernels and reductions of yield components (2–4%). Two-way and three-way interactions accounted for 25–40% of variation in the examined traits, which indicates great importance of multi-environment tests, using different Fusarium isolates for inoculation. Separate inoculation with F. graminearum isolates, differing in aggressiveness, did not appear to be more advantageous than their use in mixture that showed medium or below-average aggressiveness in all traits. The application of an isolate mixture could be recommended as a “less costly” alternative to inoculation with single isolates in trials repeated in different years and/or locations. It was indicated by these experiments that especially the detection of resistance/moderate resistance to FHB could be facilitated by the use of a carefully selected mixture of isolates. However, the application of aggressive isolates (isolate B of F. culmorum in these experiments) appeared to be beneficial to eliminate FHB susceptible materials in the breeding process.  

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