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1989 Fiscal Year Final Research Report Summary

Utilization of F_1 weakness gene for breeding of rice varieties which prevent gene pollution

Research Project

Project/Area Number 62860001
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field Breeding science
Research InstitutionNational Institute of Genetics

Principal Investigator

OKINO Hiroko (森島 啓子)  Natl. Inst. of Genet., Dept. of Integrated Genet., Professor, 総合遺伝研究系, 教授 (70000247)

Co-Investigator(Kenkyū-buntansha) IKEDA Shigeru  Kagawa University, Dept. of Agric. Research associate, 農学部, 助手 (90151290)
HIRAOKA Yo-ichiro  Natl. Inst. of Genet. Dept. of Integrated Genet., Res. associate, 総合遺伝研究系, 助手 (20145113)
YONEZAWA Katsuei  Kyouto Sangyo Univ., Professor, 工学部, 教授
KURODA Kisawo  Nara Agric. Expt. Station, Director, 場長
INAMURA Tatsuya  Nara Agric. Expt. Station, Researcher
Project Period (FY) 1987 – 1989
KeywordsHybrid weakness / Complementary genes / Red rice / Gene pollution / Varietal detardation / Weediness / Computer simulation
Research Abstract

Recently, rice varieties having particular characteristics of color, fragrance, etc. awaken the interests of breeders to meet various needs other than staple food. Those traits, however, lower the grain quality when mixed with ordinary rice, and moreover those particular varieties often show "weedy" habit. The present project aimed at practical breeding of a red-rice variety which is good for coloring agent of alcohol but does not cause genetic contamination of ordinary rice fields.
1) A number of red-rice varieties were evaluated regarding agronomic as well as chemical traits, and two were selected for breeding program. 2) A genetic system to cause inviability or weakness of F_1 hybrid was experted to work when ordinary rice plants arg naturally crossed with red rice. Since most Japanese cultivars carry one of the complementary F_1 weakness genes Hwc-2, introduction of another gene Hwc-1 into a selected red-rice variety "Soja" was carried out by backcrossing. 3) Monte Carlo computer simulation showed that this genetic system is effective for gene contamination through pollens, but not for gene contamination through seeds or plants. 4) In an attempt to discriminate pollens derived from different varieties in a pollen competition study, antibodies was obtained which have affinity to pollen polypeptides specific to red-rice "Soja". 5) Red-rice varieties are not necessarily weedy. F_2 study and selection experiment, however, indicated that weedy red rice could be segregated in the hybrid progeny between red and white non-weedy types, because two genes for red grain color are linked with two shattering genes, respectively, which work in a complementary manner.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 稲村達也: "光学特性からみた赤米の赤酒醸造特性" 近畿作育研究. 33. 28-30 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SATO,Y.I.: "Studies on the distribution of complementary genes causing F1 weakness in common rice and its wild relatives,I." Euphytica. 36. 425-431 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐藤洋一郎: "イネにおける自然交配による遺伝子汚染の拡散および品種の退化を防止する試み" 育種学雑誌. 39. 389-394 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] YONEZAWA,K.: "Computer simulated evaluation of the hybrid weakness gene system as a means to prevent genetic contamination of rice cultivars." Plant Breeding. 104. (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tang,L.H.: "Inheritance of shedding habit in weed rice." Rice Genetics Newsletter. 6. 72-73 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Inamura, T. & K. Kuroda: "Red-rice varieties for brewing "akazake" evaluated from their optical features." Kinki J. of Crop Science. 33. 28-30 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sato, Y.I. & H. Morishima: "Studies on the distribution of complementary genes causing F_1 weakness in common rice and its wild relatives, I." Euphytica. 36. 425-431 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sato, Y. I. & T. Inamura: "An attempt for preventing of spreading gene pollution by natural hybrid in rice." Japan J. Breed.39. 389-394 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yonezawa, K., Y. I. Sato, T. Nomura & H. Morishima: "Computer simulated evaluation of the hybrid weakness gene system as a means to prevent genetic contamination" Plant Breeding. 104. (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tang, L.H. & H. Morishima: "Inheritance of shedding habit in weed rice" Rice Genetics Newsletter. 6. (1990)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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