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RESEARCH-CROP
Researchers develop technology capable of increasing crop resistance to
wheat rust
CANBERRA, Jan 5, 2021 (BSS/XINHUA) – A team of researchers have developed
crops with stronger resistance to potentially devastating “wheat rust.”
The study was the result of an international collaboration between
researchers from Australia’s national science agency Commonwealth Scientific
and Industrial Research Organization (CSIRO), Xinjiang University, the
University of Minnesota, Aarhus University, The John Innes Center and the
U.S. Department of Agriculture.
In a study published on Tuesday, the team from CSIRO said they developed
genetic technologies that stack five different wheat resistance genes on top
of one another.
Wheat rust is a fungal disease that can lead up to 20-percent yield loss.
Mick Ayliffe, the lead researcher, said that building multiple layers of
protection made it harder for rust to attack wheat crops.
“Our approach is like putting five locks on a door – you’re making it very
difficult to get in,” he said in a statement.
“Rigorous field testing showed that our gene stack approach provided
complete protection against the rust pathogens we were targeting.
“Successfully validating the effectiveness of our technology makes this
approach an incredibly attractive opportunity to protect global grain crops.”
According to the CSIRO an outbreak of wheat rust in Australia would cost
the industry 1.4 billion Australian dollars (1.07 billion U.S. dollars) over
a decade.
Ayliffe said the technology had focused only on stem rust but could be
expanded to target stripe and leaf rust diseases.
“One of the genes we selected actually protects against stem, leaf and
stripe rust diseases, so it’s entirely possible to include genes that also
work against other rust species,” he said.
“We don’t know the limits of this new gene stacking technology yet. We
currently have an even larger genetic stack with eight resistance genes in
the lab, so even more protection against rust is possible.”
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