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Elucidation of the molecular mechanism of hybrid vigor in Brassica vegetables

Research Project

Project/Area Number 19H02947
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 39030:Horticultural science-related
Research InstitutionKobe University

Principal Investigator

FUJIMOTO RYO  神戸大学, 農学研究科, 准教授 (60620375)

Co-Investigator(Kenkyū-buntansha) 宅野 将平  総合研究大学院大学, 先導科学研究科, 助教 (20547294)
奥崎 文子  玉川大学, 農学部, 准教授 (40759750)
藤井 壮太  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (90716713)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords雑種強勢 / ヘテロシス / エピジェネティクス / QTL / ゲノムワイド関連解析 / DNAメチル化 / ゲノム編集 / ハクサイ / アブラナ科
Outline of Research at the Start

本研究の概要は、以下の4点である。(1) ハクサイの市販品種の自殖後代を用いたQTL解析により、初期生育時の植物サイズと収量に関わるゲノム領域を特定する。 (2) ハクサイのF1品種を中心に解析するゲノムワイド関連解析により雑種強勢と関連性を示すゲノム領域を同定する。(3) 全ゲノムDNAメチル化解析により、雑種強勢の発現を引き起こすのに必要な両親系統間のDNAメチル化の違いを生み出す領域・遺伝子を特定する。(4) DNAメチル化関連遺伝子の突然変異体を作出し、植物の形質に与える影響を明らかにする。

Outline of Final Research Achievements

To elucidate the molecular mechanism of hybrid vigor in Chinese cabbage, we performed genetic, genome-wide association, and whole genome DNA methylation analyses. In the genetic analysis, we identified QTLs that are related leaf area at 14 days after sowing or yield. Whole genome DNA methylation analysis identified regions where DNA methylation levels differed between the parental lines and their F1 progenies. For genome-wide association analysis, RNA-seq was performed on 73 F1 hybrid cultivars to obtain polymorphic information. In addition, mutants of genes involved in DNA methylation were generated by genome editing.

Academic Significance and Societal Importance of the Research Achievements

現時点では雑種強勢を示す親系統の組合せを分子マーカーで推定する方法がないため、最適な親系統の組合せは実際にF1を作出し、そのF1の形質を評価するまで判断できず、この作業には多大な労力と時間を要する。本研究では、雑種強勢が見られる形質に関わるQTLを同定した。また、現在解析中のゲノムワイド関連解析などの結果が得られ、雑種強勢に重要な領域や遺伝子の同定へと繋がれば、DNAマーカー等の分子マーカーの開発へと発展できる可能性がある。これにより、両親系統の選抜や両親系統の組合せ能力検定にかかるコストと労力の軽減が期待され、その社会的な意義は大きいと考える。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (16 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Book (2 results)

  • [Int'l Joint Research] CSIRO(オーストラリア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] CSIRO(オーストラリア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] CSIRO(オーストラリア)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Characterization of histone H3 lysine 4 and 36 tri-methylation in Brassica rapa L.2021

    • Author(s)
      Mehraj H, Takahashi S, Miyaji N, Akter A, Suzuki Y, Seki M, Dennis ES, Fujimoto R
    • Journal Title

      Front Plant Sci

      Volume: 12 Pages: 659634-659634

    • DOI

      10.3389/fpls.2021.659634

    • NAID

      120007099006

    • Description
      in press
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 植物の雑種強勢研究の現状と展望2021

    • Author(s)
      藤原一将, 白木沙彩, 神矢良樹, 藤本龍
    • Journal Title

      農業および園芸

      Volume: 96 Pages: 1075-1085

    • NAID

      40022756266

    • Related Report
      2021 Annual Research Report
  • [Journal Article] In Arabidopsis thaliana heterosis level varies among individuals in an F1 hybrids population.2020

    • Author(s)
      Hasan Mehraj, Takahiro Kawanabe, Motoki Shimizu, Naomi Miyaji, Ayasha Akter, Elizabeth S. Dennis, Ryo Fujimoto.
    • Journal Title

      Plant (Basel)

      Volume: 9 Issue: 4 Pages: 414-414

    • DOI

      10.3390/plants9040414

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Prospects for increasing the density of genetic markers in Chinese cabbage linkage map using GRAS-Di technique2022

    • Author(s)
      Mehraj Hasan, 安田剛志, 藤本龍
    • Organizer
      園芸学会令和4年度春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Characterization of Histone H3 Lysine 4 and 36 Tri-methylation in Brassica rapa L.2021

    • Author(s)
      Hasan Mehraj, Satoshi Takahashi, Yutaka Suzuki, Motoaki Seki, Elizabeth S. Dennis, Ryo Fujimoto
    • Organizer
      2021 Australian Brassica Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparative paralog histone modification states following whole genome triplication in Brassica rapa L.2021

    • Author(s)
      Hasan Mehraj, Satoshi Takahashi, Naomi Miyaji, Motoaki Seki, Elizabeth S Dennis, Ryo Fujimoto
    • Organizer
      2021 Cold Spring Harbor meeting: Plant Genomes, Systems Biology and Engineering (Virtual)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] DNAメチル化転移酵素によるシロイヌナズナの雑種強勢制御機構2020

    • Author(s)
      山下萌, 安田(高崎)剛志, 藤本龍
    • Organizer
      日本育種学会 第138回講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] シロイヌナズナにおけるヒストン脱アセチル化酵素HDA6が雑種強勢に及ぼす影響2020

    • Author(s)
      村上照実, 安田 (高崎) 剛志, 藤本龍
    • Organizer
      日本育種学会 第138回講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Comparison of the Transcriptome profile between F1 hybrid cultivar and its parental lines at two early developmental stages in Chinese cabbage2019

    • Author(s)
      メエラジ ハサン, 松尾康大, 安田剛志, 藤本龍
    • Organizer
      園芸学会令和元年度秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Identification of non-additively expressed genes at early developmental stages in an F1 hybrid cultivar of Chinese cabbage2019

    • Author(s)
      Hasan Mehraj, Kodai Matsuo, Motoki Shimizu, Takeshi Yasuda, Ryo Fujimoto
    • Organizer
      2019 KSBB & SABRAO International Conference on Plant Breeding for Sustainable Development
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アブラナ科作物へのゲノム編集技術の利用2019

    • Author(s)
      奥崎文子、肥塚信也
    • Organizer
      園芸学会令和元年度秋季大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Book] Advances in Plant Breeding Strategies: Vegetable Crops2021

    • Author(s)
      Takumi Okamoto, Xiaochun Wei, Hasan Mehraj, Mohammad Rashed Hossain, Ayasha Akter, Naomi Miyaji, Yoshinobu Takada, Jong-In Park, Ryo Fujimoto, Ill-Sup Nou, Masao Watanabe
    • Publisher
      Springer, Nature
    • ISBN
      9783030669683
    • Related Report
      2021 Annual Research Report
  • [Book] Genomic Designing of Climate-Smart Vegetable Crops2020

    • Author(s)
      Lv H, Miyaji N, Osabe K, Akter A, Mehraj H, Shea DJ, Fujimoto R
    • Total Pages
      383
    • Publisher
      Springer
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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