Scientists Pinpoint a Rice Gene that Confers Broad-spectrum Herbicide Resistance
Rice experts from the National Agriculture and Food Research Organization
(NARO) in Japan and partners found a rice gene that confers broad-spectrum
resistance to â-triketone herbicides. Benzobicyclon (BBC), a â-triketone
herbicide, is useful in many rice paddies, however, some rice varieties are
susceptible to BBC. Discovery of the genetic cause of this susceptibility
will help breeders develop BBC-resistant crops. The results of the study are
published in Science.
NARO scientist, Hideo Maeda, and colleagues pinpoint the rice gene HPPD
INHIBITOR SENSITIVE 1 (HIS1), which confers resistance to BBC and other
herbicides of its kind. The researchers found that HIS1 encodes a specific
enzyme that detoxifies the herbicides by speeding up its degradation.
Further analysis revealed that BBC-susceptible rice inherited a
dysfunctional his1 from indica rice. When HIS1 was expressed in Arabidopsis,
the resulting plants showed resistance not just to BBC but to four other
Based on the findings, HIS1 could be used to develop herbicide resistant