Utilization and Molecular Characterization of Seed Protein Composition Mutants in Rice Plants

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概要

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• Through the use of mutation breeding, we developed the cultivar LGC1, which has a low glutelin and high prolamine content, from Nihonmasari. Because of the indigestibility of prolamine, LGC1 can be used as a low-protein rice in practice. It is thus a prospective food for people such as patients with kidney disease who must restrict their protein intake. Furthermore, to reduce the content of easy-to-digest protein in LGC1, we developed two new rice cultivars, 'LGC-Katsu' and 'LGC-Jun', from a cross between LGC1 and a mutant line of Koshihikari (induced by gamma-irradiation) that was deficient in 26-kDa globulin (another easy-to-digest protein). The glutelin content of these two new cultivars is reduced to about one-third that of regular cultivars, and 26-kDa globulin is completely absent. Consequently, the total amount of easy-to-digest protein in the new cultivars is about half that of regular cultivars, and about 15% less than in LGC1. These cultivars should therefore greatly help in the dietary management of patients with chronic renal failure. We also discussed the genome structures and mechanisms of the seed protein composition mutation.

• 独立行政法人　国際農林水産業研究センターの論文

著者

• Nishimura Minoru

  Institute Of Radiation Breeding National Institute Of Agrobiological Sciences

• KUSABA Makoto

  Graduate School of Agricultural and Life Sciences, The University of Tokyo

• MORITA Ryohei

  Institute of Radiation Breeding, National Institute of Agrobiological Sciences

関連論文

• Characterization of Chlorophyllide a Oxygenase (CAO) in Rice
• NBRP, National Bioresource Project of Japan and plant bioresource management
• Mutant Selection from Progeny of Gamma-ray-irradiated Rice by DNA Heteroduplex Cleavage using Brassica Petiole Extract
• Molecular characterization of mutations induced by gamma irradiation in rice
• Knockout of glutelin genes which form a tandem array with a high level of homology in rice by gamma irradiation
• New Rice Varieties with Low Levels of Easy-to-digest Protein, 'LGC-Katsu' and 'LGC-Jun'
• A Novel Carotenoid Derivative, Lutein 3-Acetate, Accumulates in Senescent Leaves of Rice
• Induction of a Large Deletion Including the waxy Locus by Thermal Neutron Irradiation in Rice
• Waxy Rice Mutants with Unique Processing Properties for Waxy Rice Breeding
• Utilization and Molecular Characterization of Seed Protein Composition Mutants in Rice Plants

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