Plant Molecular Biology

, Volume 35, Issue 1–2, pp 69–77 | Cite as

Rice genetic resources: history, conservation, investigative characterization and use in Japan

  • Masahiro Nakagahra
  • Kazutoshi Okuno
  • Duncan Vaughan


Rice has been grown in Japan for about 3000 years. Although both japonica and indica varieties have been grown in Japan, now japonica rices are grown. Japanese rice breeding has used an ecological breeding approach. While emphasis in rice breeding in the 1940's and 1950's focussed on yield in recent decades quality has been of major importance. Consumer preference and name recognition of high quality varieties, such as Koshihikari, has resulted in slow acceptance of new varieties.

Rice germplasm was systematically collected throughout Japan between 1962 and 1963. Subsequent acquisition and collecting, in Japan and other countries, has resulted in 28,000 accessions being conserved in the National Genebank, based at the National institute of Agrobiological Resources (NIAR).

Research on genetic diversity of rice using a range of techniques, for example esterase isozymes, has revealed clinal variation in rice radiating from the center of diversity of rice in and around southwest China. Newly found genes in traditional rice germplasm, such as genes for non-elongating mesocotyl, are now routinely identified on the rice genome. Pioneering studies on eco-genetic differentiation of species in the genus Oryza in Japan has revealed much about the complex genepool for which rice evolved.

Pest and disease resistance sources, particularly to blast, bacterial blight and brown plant hopper, from many countries have been incorporated into Japanese varieties. Cold tolerance at the booting stage was found in the Indonesian variety Silewah. In the future in characterisation of rice germplasm and interaction between rice germplasm specialists and rice molecular scientists, both in Japan and internationally, will be corner stones to securing rice genetic diversity and rice improvement in the next century.

rice wild rice Oryza spp. evolution conservation evaluation utilization germplasm genetic resources genebank 


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  1. 1.
    Aikens CM, Higuchi T: Prehistory of Japan. Academic Press, New York (1982).Google Scholar
  2. 2.
    Akemine H, Kikute H: Genetic variability among hybrid populations of the rice plant grown under various environments. In: Sakai K, Takahashi R, Akemine H (eds) Studies on the Bulk Method of Plant Breeding, pp. 89–105 (in Japanese). Yokendo Co., Tokyo (1958).Google Scholar
  3. 3.
    Doi K, Nakano M, Yoshimura A, Iwata N, Vaughan DA: Phylogenetic study of A-genome species in the genus Oryza using nuclear RFLP. Breed Sci (in press).Google Scholar
  4. 4.
    Fujimaki H: Genetic restructuring of the rice plant. In: Recent Progress in Rice Research and Challenges toward the 21st Century, pp. 3–9. JIRCAS, MAFF, Japan (1994).Google Scholar
  5. 5.
    Fukui Prefectural Government n.d. Koshihikari. Brochure for the 2nd Asian Crop Science Conference, Fukui, 1995, 22 pp. (1995).Google Scholar
  6. 6.
    Ikeno S: Uber die Bestaubung und die Bastardierung von Reis. Zt Pflanzenzücht 2: 495–503 (1914).Google Scholar
  7. 7.
    Ito H: Organisation of the National Seed Storage Laboratory for Genetic Resources in Japan. Pages 405–416. In: Roberts EH (ed) Viability of Seeds, pp. 405- 416. Chapman and Hall, London (1972).Google Scholar
  8. 8.
    Ito H, Hayashi K: Studies on the storage of rice seeds. I. Influences of temperature and moisture content on the longevity of rice seeds and methods for drying seeds. Proc Crop Sci Soc Japan 28: 363–364 (in Japanese with English summary) (1960).Google Scholar
  9. 9.
    Ito H, Hayashi K: Studies on the storage of rice seeds. II. The moisture content, viability and longevity of rice seeds in different methods of processing. Proc Crop Sci Soc Japan 29: 97–99 (Japanese with English summary) (1960).Google Scholar
  10. 10.
    Katayama T, Onizuka W: Intersectional F1 plants from Oryza sativa x O. ridleyi and O. sativa x O. meyeriana. Jpn J. Genet 54: 43–46 (1979). €Google Scholar
  11. 11.
    Katayama T, Onizuka W, Shin YB: Intersectional F1 hybrids obtained from the crosses Oryza minutaPresl. x O. ridleyiHook. and O. officinalisWall x O. ridleyiHook Jpn J Genet 56: 67–71 (1981).Google Scholar
  12. 12.
    Kato S: On the affinity of cultivated varieties of rice plants, Oryza sativaL. J Dept Agric Kyushu Imp Univ 2: 241–276 (1930).Google Scholar
  13. 13.
    Katsuta M, Okuno K, Afzal M, Anwar R: Genetic differentiation of rice germplasm collected in northern Pakistan. JARQ ??? 30: 61–67 (1996).Google Scholar
  14. 14.
    Kawase M et al.: Intraspecific variation and genetic differentiation based on restriction fragment length polymorphism in Asian cultivated rice, Oryza sativaL. In: IRRI (ed) Rice Genetics II, pp. 467–473. IRRI, Los Baños, Philippines (1991).Google Scholar
  15. 15.
    Kihara H: History of biology and other sciences in Japan in retrospect. Proc 12th Int Congr Genet 3: 49–70 (1969).Google Scholar
  16. 16.
    Kushibuchi K: Rice cultivation in Japan. Present conditions and prospects. National Agricultural Research Center, Japan (1988).Google Scholar
  17. 17.
    Maruyama K, Araki H, Kato H: Thermosensitive genetic male sterility induced by irradiation. In: Rice Genetics II. Proceedings of the Second International Rice Genetics Symposium, pp. 227–232. IRRI, PO Box 933, Manila, Philippines (1991).Google Scholar
  18. 18.
    Matsuo T: Rice culture in Japan. MAFF, Japan (1957).Google Scholar
  19. 19.
    Matsuo T: Origin of rice development in Japan. In: Rice and Rice Cultivation in Japan, pp. 1–7. Institute of Economic Affairs, Tokyo, Japan (1961).Google Scholar
  20. 20.
    Moringa T: Cytogenetical investigations on Oryza species. In: IRRI (ed) Rice Genetics and Cytogenetics, pp. 91–110. Elsevier, Amsterdam (1964).Google Scholar
  21. 21.
    Morishima H, Martins PS (eds): Investigations of plant genetic resources in the Amazon Basin with the emphasis on the genus Oryza. The monbusho International Scientific Research Program, Japan/Research Support Foundation of the State of Saõ Paulo, 100 pp. (1994).Google Scholar
  22. 22.
    Morishima H, LU Gadrinab: ??? Are the Asian common wild rice differentiated into the indica and japonica types? In: International Symposium on ‘Crop Exploration and Utilization of Genetic resources’, pp. 11–20. Taichung District Agricultural Improvement Station (1987).Google Scholar
  23. 23.
    Nagamatsu T, Omura T: Collection and evaluation of local rice varieties in Japan. In: Matsuo T (ed) Gene Conservation. JIBP Synthesis vol 5, pp. 50–53, 56. Science Council of Japan, Tokyo (1975).Google Scholar
  24. 24.
    Nakagahra M: Geographic distribution of esterase genotypes of rice in Asia. Rice Genet Newsl 1: 118–120 (1984).Google Scholar
  25. 25.
    Nakagahra M et al.: A report of the PARC/NIAR cereal collecting expedition in Pakistan. NIAR, 71 pp. (1989).Google Scholar
  26. 26.
    Namai H: Education and research of plant breeding and genetic resources at universities in Japan. In: University of Tsukuba Asia and the Pacific Programme of Educational Innovation for Development, Series 4, pp. 83–115. University of Tsukuba (1995).Google Scholar
  27. 27.
    NIAR (National Institute of Agrobiological Resources): Primary Evaluation of Introduced Rice Germplasm. Miscellaneous publication of the National Institute of Agrobiological Resources, 318 pp. (1994).Google Scholar
  28. 28.
    NIAR: Studies on diversity of plant genetic resources. Laboratory of Plant Genetic Diversity. NIAR (in Japanese) (1995).Google Scholar
  29. 29.
    NIAR: Annual Report for 1995. NIAR, Tsukuba (1996).Google Scholar
  30. 30.
    NIAR-IBPGR: A report of IBPGR exploration in northern Pakistan (1991). NIAR, 63 pp. (1992).Google Scholar
  31. 31.
    Oka HI: The ancestors of cultivated rice and their evolution. Selected papers of Dr H.I. Oka and co-workers. National Institute of Genetics, Mishima, 362 pp. (1980).Google Scholar
  32. 32.
    Oka HI: Origin of Cultivated Rice. Elsevier, Amsterdam, 255 pp. (1988).Google Scholar
  33. 33.
    Okabe S: Breeding for high-yielding varieties in Japan. In: Rice Breeding, pp. 57–59. IRRI, Los Bañ os/Manila, Philippines (1972).Google Scholar
  34. 34.
    Okuno K: Geographical distribution of complementary recessive genes controlling hybrid breakdown of rice. Rice Genet Newsl 3: 44–45 (1986).Google Scholar
  35. 35.
    Okuno K: International collaboration for conserving genetic diversity of plant genetic resources. In: Asia and Pacific Programme of Educational Innovation for Development, series 4, pp. 151–158. University of Tsukuba (1996).Google Scholar
  36. 36.
    Okuno K, Nagamine T, Oka M, Kawase M, Katsuta M, Egawa Y, Nakagahra M: New lines harbouring du genes for low amylose content in endosperm starch of rice. JARQ 27: 102–105 (1993).Google Scholar
  37. 37.
    Sano Y: Adaptive strategies compared between the diploid and tetraploid forms of Oryza punctata. Bot Mag Tokyo 93: 171–180 (1980).Google Scholar
  38. 38.
    Sano Y, Morishima H, Oka HI: Intermediate perennial-annual populations of Oryza perennis found in Thailand and their evolutionary significance. Bot Mag Tokyo 93: 291–350 (1980).Google Scholar
  39. 39.
    Sano Y, Sano R: Variation of the intergenic spacer region of ribosomal DNA in cultivated and wild rice species. Genome 33: 209–218 (1989).Google Scholar
  40. 40.
    Satake T, Toriyama K: Two extremely cool tolerant varieties. Int Rice Res Newsl 4(2): 9–10 (1979).Google Scholar
  41. 41.
    Sato YI: Ecological-genetic studies on wild and cultivated rice in tropical Asia (4th Survey). Tropics 3: 189–245 (1994).Google Scholar
  42. 42.
    Tateoka T: Taxonomic studies of the Oryza. III. Key to the species and their enumeration. Bot Mag Tokyo 76: 165–173 (1963).Google Scholar
  43. 43.
    Tateoka T: Notes of some grasses. XVI. Embryo structure of the genus Oryza in relation to their systematics. Am J Bot 51: 539–543 (1964).Google Scholar
  44. 44.
    Tateoka T, Pancho JV: Acytotaxonomic study of Oryza minuta and O. officinalis. Bot Mag Tokyo 76: 366–373 (1963).Google Scholar
  45. 45.
    Yasui H, Iwata N: Production of monosomic alien addition lines of O. sativa having a single O. punctata chromosome. In: IRRI (ed) Rice Genetics II, pp. 147–155. IRRI, Los Bañ os, Philippines (1991).Google Scholar

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Masahiro Nakagahra
    • 1
  • Kazutoshi Okuno
    • 1
  • Duncan Vaughan
    • 1
  1. 1.National Institute of Agrobiological Resources (NIAR)Tsukuba, IbarakiJapan

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