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Studies on the induction of macromutations through the reorganization of gene systems in rice (Oryza sativa L.)

Research Project

Project/Area Number 62560004
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Breeding science
Research InstitutionTHE UNIVERSITY OF TOKYO

Principal Investigator

YAMAMOTO Koji  Fac. of Agriculture, The Univ. of Tokyo, 農学部, 助教授 (70011971)

Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1988: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1987: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsOryza sativa L. / diploid-like plant / gamma-ray / tetraploid / RFLP / 遺伝子システム / 4倍体 / ガンマ線照射
Research Abstract

Populations of artificial autotetraploids of rice (Oryza sativa L. cvs. Nipponbare and Fukunishiki) were repeatedly irradiated with gamma-rays through several generations. Plants which did not differ in appearance from the original diploid plants occured occasionally in the populations. These plants were designated as diploid-like plants. Nine diploid-like plants were obtained so far, and their generations were advanced without irradiation in order to examine the mode of segregation of characters in their progeny. The results indicated that the diploid-like plants with multiple mutant characters could be obtained and that dominant characters, i.e. awned spikelet and colored apiculus, were included in the mutant characters. The observation of chromosomes revealed that the diploid-like plants had the same number of chromosomes (2n = 24) as diploid rice plants had. We failed in detecting microscopically the structural changes of chromosomes. We have been exploring the application of restriction fragment length polymorphism (RFLP) analysis to the problem.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] Koji YAMAMOTO.: Japan J.Bread. 38. 470-473 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] YAMAMOTO, Koji: "Variations in visible characters of diploid-like plants derived from gamma-irradiated tetraploid in rice (Oryza sativa L.)" Japanese Jorunal of Breading. 38. 470-473 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Koji,Yamamoto: Japanese Journal Breeding. 38. 470-473 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 福岡浩之: 育種学雑誌 別冊1. 38. (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] 山元皓二: 育種学雑誌 別冊1. 38. (1988)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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