Genomic analysis reveals that the wheat blast fungus spread independently from South America to two other continents.
Credit: Nature and Science/Alamy
“This is a very serious disease; it threatens wheat cultivation in some of the poorest parts of the world,” study co-author Nick Talbot, a plant pathologist at the Sainsbury Laboratory in Norwich, UK, said at a press briefing. “It also has the capacity to spread throughout the world.”infects wild and cultivated grasses, most notably rice and wheat. Researchers first detected the pathogen in Brazilian wheat crops in the 1980s.
The import of infected seeds is a likely source of the outbreaks, say researchers — Bangladesh acquired vast quantities of wheat seed from Brazil in the year before wheat blast appeared. But the precise origin is unclear. The lineage implicated was found in Brazil, as well as in Bolivia.
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