Abstract
Fusarium head blight (FHB) causes significant grain loss and contamination of grains with harmful mycotoxins, especially deoxynivalenol (DON). Fusarium resistance and DON accumulation have been extensively investigated in various cultivars; however, the level of DON-3-O-glucoside (D3G) has not been as carefully studied. In this study, we measured accumulated DON and D3G levels in CIMMYT wheat elite germplasm using an analytical method validated in-house. Co-occurring nivalenol (NIV) and ergostrerol (ERG) were also analyzed. LC-MS/MS and LC-UV analyses were applied to the 50 CIMMYT elite wheat lines. D3G showed rather high correlation with DON (r = 0.82), while FHB symptoms showed slight correlation with DON and D3G (r = 0.36 and 0.32, respectively). D3G/DON ratio varied widely from 8.1 to 37.7%, and the ratio was not related with FHB resistance in this dataset.
Highlights
Small grain cereals such as wheat and barley are susceptible to pathogenic fungi of the genusFusarium, especially those that cause Fusarium head blight (FHB) or scab
In Japan, there was a historic outbreak of FHB in 1963 in Kyushu district following a long period of precipitation that occurred during the anthesis and maturation of the wheat crop
A similar situation arose in China, where the Yellow and Huai wheat production zone has become increasingly affected with FHB in the last few decades, and this trend will continue in the near future [3]
Summary
Small grain cereals such as wheat and barley are susceptible to pathogenic fungi of the genus. Fusarium, especially those that cause Fusarium head blight (FHB) or scab. FHB prevails throughout the major wheat-producing areas of the world, with exception of the Indian subcontinent and Australia. Infected spikelets exhibit symptoms of discoloration, and severe FHB can result in shriveled and pale pink grains with low quality and yield [1]. In the USA and Canada, FHB was of minimal importance prior to the 1990s, but is one of the most important wheat diseases [2]. A similar situation arose in China, where the Yellow and Huai wheat production zone (the most important wheat production zone in China) has become increasingly affected with FHB in the last few decades, and this trend will continue in the near future [3]
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