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View Article
AUTHOR
  Jeon J-S, Lee S, Jung K-H, Yang W-S, Yi G-H, Oh B-G, An G. (2000)
TITLE   Production of transgenic rice plants showing reduced heading date and plant height by ectopic expression of rice MADS box genes.
JOURNAL   Molecular Breeding, 6, 581-592
File
   MolBreedOsMADSs.pdf (190.0 KB) Download : 640
  The Abstract Of The Paper
Plant architecture is an important factor that controls several characteristics, such as light interception, harvest
index, and lodging. Plant architecture is controlled by a group of regulatory genes. It was previously found that
ectopic expression of some MADS-box genes resulted in early flowering and a dwarf habit in Arabidopsis and
tobacco (Nicotiana tabacum) plants. To explore ways to alter heading time and heading height, we expressed
ectopically several OsMADS (Oryza sativa MADS-box) genes in rice plants. The OsMADS cDNA clones were
connected to the maize ubiquitin promoter in the sense orientation, and the constructs were introduced into rice
plants by the Agrobacterium-mediated transformation. Ectopic expression of the rice MADS-box genes hastened
flowering to varying extents. RNA-blot analyses revealed that the phenotypes of early flowering and dwarfism were
correlated with the transcript level of the transgene. In addition, weak expression of OsMADS1 using the nopaline
synthase (nos) promoter, shortened the heading time by a few days and resulted in a mild reduction of heading
height without any pleiotropic effects. The present study suggests that the rice MADS box genes could be used as
sources of early-flowering and dwarfing traits in monocot species.
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 Next   Tissue-preferential expression of a rice ¥á-tubulin gene, OsTubA1, mediated by the first intron.
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