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Development of ploidy diversification methods utilizing artificially induced unreduced male gametes

Research Project

Project/Area Number 20K06035
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39030:Horticultural science-related
Research InstitutionUniversity of Miyazaki

Principal Investigator

Hirano Tomonari  宮崎大学, 農学部, 准教授 (80455584)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords重複受精 / 胚発生 / 重イオンビーム / 花粉 / 雄性配偶子 / 非還元性配偶子
Outline of Research at the Start

放射線の一種である重イオンビームをヒガンバナ科キルタンサスの二細胞性花粉に照射することで誘導された非還元性雄性配偶子「雄原細胞様精細胞」が、胚発達を伴わない異常胚乳形成に関与する可能性が示唆されている。本研究では、この異常胚乳形成過程を精査し、雄原細胞様精細胞の受精様式と受精能力、異常胚乳の倍数性を明らかにする。さらに、異常胚乳および胚にならない卵細胞(または受精卵)は、多様な倍数性を示す可能性があるため、胚珠培養と胚嚢培養による植物体再生を試みる。半数体から四倍体の誘導に加え、迅速な染色体添加、染色体欠失系統の作出など、人為誘発した非還元性雄性配偶子の活用による倍数性多様化の可能性を探る。

Outline of Final Research Achievements

In this study, we analyzed effects of male gametes of Cyrtanthus mackenii (Amaryllidaceae) irradiated with heavy-ion beams, a type of radiation, on fertilization. Two types of embryo sacs with an embryo and endosperm and with
an egg cell or an undivided zygote and endosperm were observed. Furthermore, the embryos and endosperm showed various DNA contents. We attempted ovule culture to induce plantlet from the distinctive embryo and endosperm for breeding. We examined the ovule culture conditions, and plant regeneration and germination from the embryos and callus formation from the endosperm were confirmed. These results show the possibility of plant regeneration from the endosperm. In the ovules derived from heavy-ion irradiated pollen, callus and shoot formation were also observed by the ovule culture but no plant regeneration was observed. Therefore, further investigation of irradiation conditions and plant regeneration conditions is required.

Academic Significance and Societal Importance of the Research Achievements

植物の雄性配偶子におけるDNA損傷応答およびそれら損傷の受精への影響はこれまでに詳細な解析が行われておらず、本研究の成果は植物の受精機構を理解するうえで重要な知見となる。花粉への放射線照射は、これまでにも半数体獲得等の目的で品種改良技術として用いられてきたが、本研究では重イオンビームの放射線としての特徴を活かすことで迅速に倍数性を多様化する新たな品種改良技術として利用することが可能であることが示された。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2024 2023 2022 2021 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (4 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Journal Article] Distinctive development of embryo and endosperm caused by male gametes irradiated with carbon-ion beam2024

    • Author(s)
      Tomonari Hirano, Muneaki Murata, Yurie Watarikawa, Yoichiro Hoshino, Tomoko Abe, Hisato Kunitake
    • Journal Title

      Plant Reproduction

      Volume: - Issue: 3 Pages: 355-363

    • DOI

      10.1007/s00497-024-00496-9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of fertilization of male gametes with heavy-ion beam irradiation on embryo and endosperm development in Cyrtanthus mackenii2024

    • Author(s)
      Makiko Shii, Yuki Kajiya, Muneaki Murata, Tomoko Abe, Hisato Kunitake, Tomonari Hirano
    • Journal Title

      Cytologia

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mutagenic Effects of Heavy-Ion Beam Irradiation to Plant Genome2022

    • Author(s)
      Hirano Tomonari、Kazama Yusuke、Kunitake Hisato、Abe Tomoko
    • Journal Title

      CYTOLOGIA

      Volume: 87 Issue: 1 Pages: 3-6

    • DOI

      10.1508/cytologia.87.3

    • ISSN
      0011-4545, 1348-7019
    • Year and Date
      2022-03-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] イオンビームを用いた花き植物の品種改良2022

    • Author(s)
      平野智也
    • Journal Title

      アグリバイオ

      Volume: 6 Pages: 14-18

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] DNA Damage Response of <i>Cyrtanthus mackenii</i> Male Gametes Following Argon Ion Beam Irradiation2021

    • Author(s)
      Hirano Tomonari、Matsuyama Yuka、Hanada Anna、Hayashi Yoriko、Abe Tomoko、Kunitake Hisato
    • Journal Title

      CYTOLOGIA

      Volume: 86 Issue: 4 Pages: 311-315

    • DOI

      10.1508/cytologia.86.311

    • NAID

      130008132463

    • ISSN
      0011-4545, 1348-7019
    • Year and Date
      2021-12-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Effects of fertilization of male gametes with argon-ion irradiation on embryo and endosperm development in Cyrtanthus mackenii2023

    • Author(s)
      Makiko Shii, Yuki Kajiya Tomoko Abe, Hisato Kunitake, Tomonari Hirano
    • Organizer
      15th JKTC International Student Seminar
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アルゴンイオンビーム照射雄性配偶子の受精が胚および胚乳発達に及ぼす影響2023

    • Author(s)
      椎槙子、加治屋優希、阿部知子、國武久登、平野智也
    • Organizer
      日本植物学会第87回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] アルゴンイオンビーム照射雄性配偶子の受精機構解析2022

    • Author(s)
      椎槙子、加治屋優希、阿部知子、星野洋一郎、國武久登、平野智也
    • Organizer
      園芸学会令和4年度秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 炭素イオンビーム照射雄性配偶子に起因する異常胚発生過程の解析2021

    • Author(s)
      村田宗謙, 林依子, 阿部知子, 星野洋一郎, 國武久登, 平野智也
    • Organizer
      園芸学会 令和3年度春季大会
    • Related Report
      2020 Research-status Report
  • [Remarks] 植物遺伝育種学研究室ホームページ

    • URL

      https://www.cc.miyazaki-u.ac.jp/plantbreeding/

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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