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Green revolution: a mutant gibberellin-synthesis gene in rice
Authors:Sasaki A  Ashikari M  Ueguchi-Tanaka M  Itoh H  Nishimura A  Swapan D  Ishiyama K  Saito T  Kobayashi M  Khush G S  Kitano H  Matsuoka M
Institution:Bioscience Center, Nagoya University, Nagoya 464-8601, Japan. makoto@nuagr1.agr.nagoya-u.ac.jp
Abstract:The chronic food shortage that was feared after the rapid expansion of the world population in the 1960s was averted largely by the development of a high-yielding semi-dwarf variety of rice known as IR8, the so-called rice 'green revolution'. The short stature of IR8 is due to a mutation in the plant's sd1 gene, and here we identify this gene as encoding an oxidase enzyme involved in the biosynthesis of gibberellin, a plant growth hormone. Gibberellin is also implicated in green-revolution varieties of wheat, but the reduced height of those crops is conferred by defects in the hormone's signalling pathway.
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