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Efficient haploid production using the pseudo-fertilized ovule culture and clarification of the parthenogenesis mechanism in citrus.

Research Project

Project/Area Number 20K06020
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

Kunitake Hisato  宮崎大学, 農学部, 教授 (80289628)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsカンキツ / 半数体 / 偽受精胚珠培養 / SSR / γ線 / バンペイユ / 雌性配偶子 / カルス / 花粉 / 単為生殖 / ガンマ線 / 単為発生 / 晩白柚
Outline of Research at the Start

カンキツは遺伝様式の解明が難しく、効率的な育種が困難である。半数体は倍加処理によって容易に純系を得られることから遺伝子解析や計画育種のための育種素材となる。我々は花粉への軟X線照射と胚珠培養を組合せることにより半数体を育成した。そこで、本研究では、軟X線よりも効果の高いγ線を花粉に照射し、‘晩白柚’の偽受精胚珠培養により効率的な半数体誘導について検討し、その半数体を利用して単為発生関連遺伝子との関連について解析する。

Outline of Final Research Achievements

Pseudo-fertilized ovule culture was examined for the production of haploid in ‘Banpeiyu’ pummelo [Citrus maxima (Burm.)]. The pollen of ‘Kawano-natsudaidai’ was irradiated with γrays from 0 Gy to 500 Gy, and crossed with ‘Banpeiyu’ pummelo as seed parents. Simple sequence repeat (SSR) analysis proved that the callus was a haploid derived from the egg cell, since it had only alleles derived from the seed parent. Forty days after crossing pollen irradiated with γ-rays, well-developed embryos were formed in the ovule, which did not differ from those in the non-irradiated treatment. Therefore, it was inferred that embryo development in pseudo-fertilized ovule culture progressed similarly to that of the control until 40 days after crossing, but development ceased thereafter. Overall, we consider the possibility that if ovule culture is started after 40 days, haploid cells would normally continue to develop.

Academic Significance and Societal Importance of the Research Achievements

半数体は倍加処理によって純系を得られることや,相同ゲノムを1つしか持たないことから遺伝子解析のための重要な材料となる.本研究では,γ線を‘川野夏橙’の花粉に照射し,‘晩白柚’の偽受精胚珠培養を行い,胚の発達を観察した.パラフィン切片法による胚珠の観察の結果,交配40日後の胚珠には発達した胚が形成されており,対照区と処理区間に差異はなかった.しかし,交配60日と80日後では未発達の胚や胚乳のみを持つ胚珠が増加した.このことから,培養時期は交配40日後が適しているものと考えられた.本研究の成果は,カンキツの雌性配偶子からの単為発生制御の可能性が高まり,他の品種への応用もできると考えられる.

Report

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

    (6 results)

All 2022 2021 2020

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 6 results)

  • [Journal Article] キンカン属(Fortunella) 植物の形態的特徴と果実特性.2022

    • Author(s)
      安田喜一,八幡昌紀,國武久登
    • Journal Title

      東海大学紀要農学部

      Volume: 41 Pages: 17-27

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] カンキツ属4 種とキンカン属5 種を用いたカンキツ類の遺伝解析に有用なSSR マーカーの選定.2022

    • Author(s)
      安田喜一,戸村大河,佐藤真衣,富永晃好,八幡昌紀,國武久登
    • Journal Title

      東海大学紀要農学部

      Volume: 41 Pages: 29-37

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of parental genome construction and inherited morphological characteristics in triploid and aneuploid intergeneric hybrids from a diploid-diploid cross between citrus and fortunella .2021

    • Author(s)
      Kiichi Yasuda, Masaki Yahata, Mai Sato, Miki Sudo, Akiyoshi Tominaga, Hisato Kunitake
    • Journal Title

      Agronomy

      Volume: 11(10) Issue: 10 Pages: 1-10

    • DOI

      10.3390/agronomy11101988

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Relationship between Morphology and Weight of Seeds and Ploidy Level of Seedlings Obtained by Cross between Diploid Pummelo ‘Banpeiyu’ and Triploid Grapefruit-type Citrus ‘Oroblanco’2021

    • Author(s)
      八幡 昌紀, 永嶋 友香, 大寺 佑典, 杉浦 颯希, 周藤 美希, 富永 晃好, 向井 啓雄, 國武 久登
    • Journal Title

      Horticultural Research (Japan)

      Volume: 20 Issue: 1 Pages: 29-37

    • DOI

      10.2503/hrj.20.29

    • NAID

      130008009633

    • ISSN
      1347-2658, 1880-3571
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] ウンシュウミカンにおける二倍体と四倍体の 果実品質と抗酸化能の比較2021

    • Author(s)
      佐藤真衣, 安田喜一, 菊池紘平, 戸村大河, 八幡昌紀, 國武久登
    • Journal Title

      東海大学農学部紀要

      Volume: 40 Pages: 1-8

    • NAID

      120007032503

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Production of doubled-haploid(DH) selfed-progenies in ‘Banpeiyu’ pummelo [Citrus maxima (Burm.) Merr.] and its genetic analysis with simple sequence repeat markers2020

    • Author(s)
      Miki Kawano, Masaki Yahata, Tokurou Shimizu,Chitose Honsho, Tomonari Hirano, Hisato Kunitake
    • Journal Title

      Scientia Horticulturae

      Volume: 277 Pages: 109782-109782

    • DOI

      10.1016/j.scienta.2020.109782

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2020-04-28   Modified: 2024-01-30  

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