Institute of Crop Science, NARO

Radiation Breeding Division

The Radiation Breeding Division (formerly known as Institute of Radiation Breeding under the National Institute of Agrobiological Sciences) is engaged in the development of new crop strains through mutation induction, and is conducting research into more efficient methods for inducing mutation. While working to contribute to the breeding of new varieties of various seed-propagated, vegetatively propagated and woody crops, we are conducting fundamental research to elucidate the mechanism of mutation. We are also promoting irradiation services and energetic joint research programs at the request of universities, private industries and local governments.

The Radiation Breeding Division comprises two irradiation facilities for the mutation breeding of crop species. The gamma field is a circular field of 100m radius with 88.8 TBq Co-60 source at the center. The field is surrounded by a shielding dike of 8m in hight. The gamma room is shielded building equipped with a 44.4 TBq Co-60 source. The facility is used for the acute irradiation of seed, bulbs, tubers and scions.


KATO Hiroshi


TAKYU Toshio Principal Scientist
YAMANOUCHI Hiroaki Principal Scientist
SHIMIZU Akemi Principal Scientist
MASE Nobuko Senior Scientist
NISHIMURA Noriyuki Senior Scientist
LI Feng Senior Scientist

Research Publications

  • Yamaguchi H, Shimizu A, Hase Y, Tanaka A, Shikazono N, Degi K, Morishita T (2010) Effects of ion beam irradiation on mutation induction and nuclear DNA content in chrysanthemum Breeding Science 60(4):398-404
  • Morita R, Kusaba M, Iida S, Nishio T, Nishimura M (2009) Development of PCR markers to detect the glb1 and Lgc1 mutations for the production of low easy-to-digest protein rice varieties Theoretical and Applied Genetics119:125-130
  • Nishimura M, Morita R, Kusaba M (2009) Utilization and molecular characterization of seed protein composition mutants in rice plants Japan Agricultural Research Quarterly 43(1):1-5
  • Morita R, Sato Y, Masuda Y, Nishimura M, Kusaba M (2009) Defect in NON YELLOW COLORING 3, an α/β hydrolase-fold family protein, causes a stay green phenotype during leaf senescence in rice The Plant Journal 57:120-131
  • Morita R, Kusaba M, Iida S, Yamaguchi H, Nishio T, Nishimura M (2009) Molecular characterization of mutations induced by gamma irradiation in rice Genes & Genetic Systems 84:361-370
  • Yamaguchi H, Shimizu A, Hase Y, Degi K, Tanaka A, Morishita T (2009) Mutation induction with ion beam irradiation of lateral buds of chrysanthemum and analysis of chimeric structure of induced mutants Euphytica 165(1):97-103
  • Yamaguchi H, Shimizu A, Degi K, Morishita T (2008) Effects of dose and dose rate of gamma ray irradiation on mutation induction and nuclear DNA content in chrysanthemum Breeding Science 58(3):331-335
  • Kusaba M, Ito H, Morita R, Iida S, Sato Y, Fujimoto M, Kawasaki S, Tanaka R, Hirochika H, Nishimura M, Tanaka A (2007) Rice NON-YELLOW COLORING 1 is involved in light-harvesting complex II and grana degradation during leaf senescence The Plant Cell 19(4):1362-1375
  • Kawakami S, Kadowaki K, Morita R, Nishimura M (2007) Induction of a large deletion including the waxy locus by thermal neutron irradiation in rice Breeding Science 57(2):153-157
  • Morita R, Kusaba M, Iida S, Nishio T, Nishimura M (2007) Knockout of glutelin genes which form a tandem array with a high level of homology in rice by gamma irradiation Genes & Genetic Systems 82(4):321-327
  • Sato Y, Morita R, Nishimura M, Yamaguchi H, Kusaba M (2007) Mendel's green cotyledon gene encodes a positive regulator of the chlorophyll-degrading pathway Proceedings of the National Academy of Sciences USA 104(35):14169-1417
  • Naito K, Kusaba M, Shikazono N, Takano T, Tanaka A, Tanisaka T, Nishimura M (2005) Transmissible and nontransmissible mutations induced by irradiating Arabidopsis thaliana pollen with gamma-rays and carbon ions Genetics 169: 881-889
  • Nishimura M, Kusaba M, Miyahara K, Nishio T, Iida S, Imbe T, Sato H (2005) New rice varieties with low levels of easy-to-digest protein, 'LGC-Katsu' and 'LGC-Jun' Breeding Science 55: 103-105
  • Kusaba M, Miyahara K, Iida S, Fukuoka H, Takano T, Sassa H, Nishimura M, Nishio T (2003) Low glutelin content1: a dominant mutation that suppresses the glutelin multigene family via RNA silencing in rice Plant Cell 15: 1455-1467