Correlation between Fusarium head blight severity and DON content in triticale as revealed by phenotypic and molecular data

2015 ◽  
Vol 135 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Thomas Miedaner ◽  
Rasha Kalih ◽  
Maren S. Großmann ◽  
Hans P. Maurer
Keyword(s):  
Fusarium Head Blight ◽  
Molecular Data ◽  
Head Blight ◽  
Fusarium Head Blight Severity

scholarly journals Fumonisin B1 and zearalenone contamination of wheat in Croatia and influence of fungicide treatments

2010 ◽  
Vol 90 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Dario Ivic ◽  
Ana-Marija Domijan ◽  
Maja Peraica ◽  
Bogdan Cvjetkovic
Keyword(s):  
Fusarium Head Blight ◽  
Fumonisin B1 ◽  
Wheat Grain ◽  
Head Blight ◽  
Fusarium Head Blight Severity ◽  
Fungicide Efficacy ◽  
Disease Pressure ◽  
Wheat Kernels

In Croatia, a trial was conducted to determine the presence of theFusariummycotoxins fumonisin B1and zearalenone in wheat kernels and to evaluate the efficacy of nine fungicides on Fusarium head blight severity as well as fumonisin B1and zearalenone accumulation in wheat grain. Fumonisin B1and zearalenone were detected in all grain samples in mean concentrations ranging from 182.0 to 446.6 µg kg-1(fumonisin B1) and from 2.59 to 5.33 µg kg-1(zearalenone). No significant differences were found among fumonisin B1and zearalenone content in wheat grain for the different fungicide treatments. No correlation was revealed between Fusarium head blight severity and fumonisin B1or zearalenone content in wheat grain, nor between fungicide efficacy and fumonisin B1or zearalenone content in wheat grain. Under conditions of high disease pressure, efficacy of the fungicides was between 85.7% (tebuconazole + triadimefon) and 72.1% (carbendazim).

scholarly journals Fusarium Head Blight Severity and Deoxynivalenol Concentration in Wheat in Response to Gibberella zeae Inoculum Concentration

2009 ◽  
Vol 99 (6) ◽  
pp. 759-764 ◽  
Author(s):  
J. M. Stein ◽  
L. E. Osborne ◽  
K. D. Bondalapati ◽  
K. D. Glover ◽  
C. A. Nelson
Keyword(s):  
Fusarium Head Blight ◽  
Disease Incidence ◽  
Field Studies ◽  
Gibberella Zeae ◽  
Linear Functions ◽  
Head Blight ◽  
Fusarium Head Blight Severity ◽  
Negative Exponential Function ◽  
Inoculum Concentration ◽  
Inoculum Dose

The relationship between inoculum dose and resulting disease levels and deoxynivalenol (DON) accumulation in the Fusarium head blight (FHB) of wheat pathosystem was examined under controlled conditions. Greenhouse-grown spring wheat plants were inoculated at flowering with suspensions that varied in Gibberella zeae macroconidia concentration. The spikes were bagged for 72 h to promote infection and plants were then kept under ambient greenhouse conditions and disease allowed to develop. Spikes were rated at 15 days after inoculation for disease incidence and severity, removed from the greenhouse, and dried. DON concentration was determined in grain-only and whole-spike samples for each inoculation treatment. Regression analysis was used to evaluate the mathematical relationship between inoculum dose and the (i) disease metrics or (ii) DON concentration. Both disease incidence and severity were found to increase sharply in relation to inoculum concentration until an asymptote was reached. In both instances, a negative exponential function was found to best explain this relationship. By contrast, DON concentration in both grain-only and whole-spike tissues increased with additional inoculum. These relationships were best explained with linear functions for both sample types, although DON accumulation increased at a greater rate in whole-spike tissue. The functions were evaluated further using data collected from unrelated field studies and, although not particularly consistent, provided reasonably accurate predictions in growing seasons when the environment was only moderately favorable for FHB.

Comparing Genetic Variation within Red Winter Wheat Populations with and without Image-Based Optical Sorter Selection

2019 ◽  
Vol 9 (2) ◽  
pp. 266-277
Author(s):  
Hussein M. Khaeim ◽  
Anthony Clark ◽  
Tom Pearson ◽  
Dr. David Van Sanford
Keyword(s):  
Genetic Variation ◽  
Fusarium Head Blight ◽  
Heading Date ◽  
Fusarium Head Blight Resistance ◽  
Gibberella Zeae ◽  
Mass Selection ◽  
Head Blight ◽  
Red Winter Wheat ◽  
Two Populations ◽  
Head Scab

Head scab is historically a devastating disease affecting not just all classes of wheat but also barley and other small grains around the world. Fusarium head blight (FHB), or head scab, is caused most often by Fusarium graminearum (Schwabe), (sexual stage – Gibberella zeae) although several Fusarium spp. can cause the disease. This study was conducted to determine the effect of mass selection for FHB resistance using an image-based optical sorter. lines were derived from the C0 and C2 of two populations to compare genetic variation within populations with and without sorter selection. Our overall hypothesis is that sorting grain results in improved Fusarium head blight resistance. Both of the used wheat derived line populations have genetic variation, and population 1 has more than population 17. They are significantly different from each other for fusarium damged kernel (FDK), deoxynivalenol (DON), and other FHB traits. Although both populations are suitable to be grown for bulks, population 1 seems better since it has more genetic variation as well as lower FDK and DON, and earlier heading date. Lines within each population were significantly different and some lines in each population had significantly lower FDK and DON after selection using an optical sorter. Some lines had significant reduction in both FDK and DON, and some others had either FDK or DON reduction. Lines of population 1 that had significant reduction, were more numerous than in population 17, and FDK and DON reduction were greater.

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