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Identification of two gene loci that determine fruit set under high temperatures in chili pepper

Research Project

Project/Area Number 21K05575
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 InstitutionKindai University (2022-2023)
Kyoto University (2021)

Principal Investigator

YAMAZAKI AKIRA  近畿大学, 農学部, 助教 (90895418)

Project Period (FY) 2021-04-01 – 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 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsトウガラシ / 着果不良 / 花粉発芽率 / 高温ストレス / 地球温暖化 / 施設園芸 / 高温着果性 / 花粉 / 高温期
Outline of Research at the Start

もし作物が40℃を超える高温下でも次々に着果する「高温着果性」を持てば,地球温暖化による減収を抑えられるであろう.しかし実際には,高温着果性を示す植物はほとんど知られていない.申請者は,高温期に着果しないトウガラシを交雑した結果,高温着果性を有するF1雑種が得られることを偶然に発見した.さらに,これらの植物から高温着果性を制御する2遺伝子領域を見出した.高温期に着果しない品種同士の交雑が高温着果性を生み出す仕組みを解明できれば,多くの果菜類や果樹で高温下の着果不良を解決する重大な糸口になるはずだ.本研究では高温着果性の原因遺伝子を特定し,F1雑種トウガラシの高温着果機構を解明する.

Outline of Final Research Achievements

High temperature stress caused by global warming is a serious problem for agricultural production. An F1 hybrid with high temperature fruit set was produced by crossing two chili cultivars without high temperature fruit set. In the F2 population, there were two gene regions associated with high temperature fruit set, but no individuals with high temperature fruit set appeared in the F5 population, suggesting that heterosis may be involved in the acquisition of high temperature fruit set. The results also revealed differences in the response of pollen development to high temperature stress between the parental cultivars. It was suggested that high temperature tolerant individuals could be produced by crossing cultivars with different responses to high temperature.

Academic Significance and Societal Importance of the Research Achievements

高温ストレス下で生殖能力や着果性を保つためには、高温着果性を有する植物の遺伝的基盤を理解することが重要である。本研究では、高温着果性を持つF1雑種の遺伝子解析を通じて、新たな高温着果性品種の育成に向けた知見を提供した。また、簡易的な花粉発芽率の評価手法を確立し、高温着果性品種のスクリーニングを行った。これにより、品種改良への有用な材料が得られた。本研究の成果は、地球温暖化による高温ストレスが農業生産に与える影響を軽減し、食料安全保障の向上と持続可能な農業の実現に貢献する。

Report

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

    (7 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Pollen Dispersion is a Key Factor for Autonomous Fruit Set under High Temperatures in the <i>Capsicum annuum</i> ‘Takanotsume’2024

    • Author(s)
      Yamazaki Akira、Takezawa Ao、Nishimura Kazusa、Motoki Ko、Nagasaka Kyoka、Nakano Ryohei、Nakazaki Tetsuya、Hosokawa Munetaka
    • Journal Title

      The Horticulture Journal

      Volume: 93 Issue: 1 Pages: 49-57

    • DOI

      10.2503/hortj.QH-094

    • ISSN
      2189-0102, 2189-0110
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A simple method for measuring pollen germination rate using machine learning2023

    • Author(s)
      Yamazaki Akira、Takezawa Ao、Nagasaka Kyoka、Motoki Ko、Nishimura Kazusa、Nakano Ryohei、Nakazaki Tetsuya
    • Journal Title

      Plant Reproduction

      Volume: 36 Issue: 4 Pages: 355-364

    • DOI

      10.1007/s00497-023-00472-9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Indicator Candidate Traits for Autonomous Fruit Set Ability Under High Temperatures in Capsicum2022

    • Author(s)
      Yamazaki Akira、Takezawa Ao、Nakano Ryohei、Nishimura Kazusa、Motoki Ko、Hosokawa Munetaka、Nakazaki Tetsuya
    • Journal Title

      Journal of Horticultural Research

      Volume: 30 Issue: 2 Pages: 105-116

    • DOI

      10.2478/johr-2022-0017

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] The effects of high-temperature stress on reproductive development in an F1 hybrid of Capsicum chinense2023

    • Author(s)
      Akira Yamazaki, Tatsuya Kitade, Munetaka Hosokawa
    • Organizer
      The 4th Asian Horticultural Congress
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] トウガラシ‘タカノツメ’が有する高温期の自動着果性の遺伝解析2023

    • Author(s)
      山崎彬・武澤亜緒・西村和紗・長坂京香・岩橋優・井上博茂・元木航・中野龍平・細川宗孝・中﨑鉄也
    • Organizer
      園芸学会 令和5年度春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 機械学習を利用した花粉発芽率の迅速計測手法の確立2022

    • Author(s)
      山崎彬・武澤亜緒・長坂京香・元木航・西村和紗・中野龍平・中﨑鉄也
    • Organizer
      園芸学会 令和4年度秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] トウガラシ品種‘タカノツメ’(Capsicum annuum L.)が持つ高温下での高着果性の原因形質の探索2022

    • Author(s)
      武澤亜緒・山崎彬・長坂京香・元木航・西村和紗・中野龍平・細川宗孝・中﨑鉄也
    • Organizer
      園芸学会 令和4年度秋季大会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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