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Molecular ecogenetic study on the invasion process of weeds into paddy fields at the beginning of rice cultivation in Japan

Research Project

Project/Area Number 17K07626
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Crop production science
Research InstitutionAkita Prefectural University

Principal Investigator

Yasuda Kentaro  秋田県立大学, アグリイノベーション教育研究センター, 准教授 (00549032)

Co-Investigator(Kenkyū-buntansha) 中山 祐一郎  大阪公立大学, 大学院現代システム科学研究科, 教授 (50322368)
Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords水田雑草の誕生 / タイヌビエ / 半直立型 / 交雑不稔 / 東日本での分布 / 史前帰化植物 / 四倍体 / 地理的変異 / 花粉不稔 / 東北での分布 / 4倍体 / 水田雑草
Outline of Final Research Achievements

An annual Echinochloa with plagiotropic tillers (semi-erect type) was found on a paddy levee in Miyagi prefecture in Japan. This semi-erect type had tetraploid chromosome numbers (2n = 36) and would be expected to be E. oryzicola. However, its appearance was distinct from that of E. oryzicola. In this study, to clarify its distribution and habitat, exploration and collection surveys were carried out in the northern part of Honshu. In addition, the genetic relationships between the semi-erect type and other Echinochloa species was examined using phylogenetic analysis based on DNA sequence data. The semi-erect type was distributed from Hokkaido to Nagano Prefecture, and located in paddy fields, abandoned paddy fields, paddy levees, roadsides, vacant land, and scree slopes. Phylogenetic analysis indicated that the semi-erect type is a subspecies or a close relative of E. oryzicola.

Academic Significance and Societal Importance of the Research Achievements

日本の多くの水田雑草は、水田稲作の渡来に付随して日本国内に侵入し、拡散したと考えられてきた。本研究では、典型的な史前帰化植物とされているタイヌビエであっても、一部の系統は日本国内に生育していたものからの雑草化で誕生した可能性を示しており、日本における水田雑草の誕生過程を考える上で意義深い提案をしている。また、ヒエ属植物は多くの耕地雑草を含んでおり、雑草として重要な属である。新しいヒエ属植物の実態を解明したことはそれらの防除および管理を進める上でも重要と考える。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019 2018

All Journal Article (4 results) (of which Peer Reviewed: 2 results) Presentation (6 results)

  • [Journal Article] A tetraploid Echinochloa with plagiotropic tillers: its distribution and habitat in northern part of the main island of Japan.2020

    • Author(s)
      Yasuda Kentaro、Mori Kaoru、Nakayama Yuichiro
    • Journal Title

      Weed Biology and Management

      Volume: 20 Issue: 2 Pages: 82-88

    • DOI

      10.1111/wbm.12207

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Misidentifications of Echinochloa crus-galli var. formosensis as Echinochloa oryzicola as a result of similar cpDNA sequences.2019

    • Author(s)
      Yasuda, K. & Y. Nakayama
    • Journal Title

      Weed Biology and Management

      Volume: 19 Pages: 93-102

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 日本に生育する水田雑草タイヌビエの由来 小穂2型の地理的変異からの仮説.2018

    • Author(s)
      保田謙太郎
    • Journal Title

      植調

      Volume: 52(11) Pages: 1-5

    • Related Report
      2018 Research-status Report
  • [Journal Article] 日本に分布するヒエ属植物 水田雑草タイヌビエについて.2018

    • Author(s)
      保田謙太郎
    • Journal Title

      農業および園芸

      Volume: 93 Pages: 799-807

    • NAID

      40021665821

    • Related Report
      2018 Research-status Report
  • [Presentation] 半直立性の草型をもつ四倍体ヒエ属植物の日本での分布と系統分類上の位置づけ2021

    • Author(s)
      保田謙太郎
    • Organizer
      東北雑草研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 半直立性の草型をもつ四倍体ヒエ属植物とタイヌビエとの遺伝的類縁性2020

    • Author(s)
      保田謙太郎・森郁・中山祐一郎
    • Organizer
      日本雑草学会第59回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] タイヌビエ型の葉緑体をもつヒメタイヌビエの分布と形態的特徴2020

    • Author(s)
      森郁・中山祐一郎・保田謙太郎
    • Organizer
      日本雑草学会第59回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 半直立性の草型をもつ四倍体ヒエ属植物の東北地方での分布2019

    • Author(s)
      保田謙太郎・森郁・中山祐一郎
    • Organizer
      日本雑草学会第58回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 半直立性の草型をもつ四倍体ヒエ属植物の生物学的特性2019

    • Author(s)
      森郁・中山祐一郎・保田謙太郎
    • Organizer
      日本雑草学会第58回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 東北地方には半直立性の草型を持つタイヌビエ(Echinochloa oryzicola)が存在する2018

    • Author(s)
      保田謙太郎・中山祐一郎
    • Organizer
      日本雑草学会第57回大会
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2024-01-30  

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