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Essential traits for rice ratooning in southwestern Japan

Research Project

Project/Area Number 20K06007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39020:Crop production science-related
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

Tanaka Ryo  国立研究開発法人農業・食品産業技術総合研究機構, 九州沖縄農業研究センター, 研究員 (30738109)

Co-Investigator(Kenkyū-buntansha) 中野 洋  国立研究開発法人農業・食品産業技術総合研究機構, 中日本農業研究センター, 主席研究員 (10414814)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords水稲 / 再生二期作 / 収量 / 非構造性炭水化物 / 葉面積指数 / 刈り取り高さ / 収穫時期 / 作期 / にじのきらめき / 準同質遺伝子系統 / 地球温暖化
Outline of Research at the Start

今後、地球温暖化が進むと、国内の全域で水稲の栽培可能期間が長くなると予想され、再生二期作の導入が西日本を中心に現実味を帯びてくる。これまでに、切り株の非構造性炭水化物(NSC)量と2回目稲の収量に正の相関関係がある等の報告はなされているものの、NSCの役割やそのほかの形質に関する報告は限られている。そこで本研究では、準同質遺伝子系統(NIL)等を用いた試験等を行うことにより、再生二期作における切り株のNSCの役割や品種に求められる重要形質を明らかにする。

Outline of Final Research Achievements

In the present study, we examined the effects of transplanting date, stubble cutting height, stubble leaf blade clipping treatment, harvest time of the first crop on the grain yield of the second crop in rice ratooning. As a result of our study, we found that since the grain yield of the second crop increased with increasing stubble nonstructural carbohydrate (NSC) content per unit area and leaf area index (LAI), stubble NSC content and LAI may be essential traits for rice ratooning, and that the stubble leaf blade contribution may be reduced when the NSC content is high as the leaf blades may compensate for the lack of NSC content when the NSC content is low. Also, we found that the grain yield difference between stubble cutting heights may narrow by narrowing the difference of the percentage of filled spikelets with increasing the air temperature. Additionally, early transplanting and high cutting height are recommended to increase grain yield of the second crop.

Academic Significance and Societal Importance of the Research Achievements

将来的に地球規模の気温上昇が見込まれる中、近年需要が高まっている業務用米や加工用米については、生産コストの大幅な低減に向け、画期的な多収が得られる栽培技術の開発が求められている。このため、画期的な多収が期待される温暖化を利用した再生二期作技術の開発は極めて重要である。本研究では、二期作目の収量に対して切株の非構造性炭水化物(NSC)量及び葉面積指数(LAI)は重要形質であり、LAIがNSC量の不足を補うことや、二期作目の気温が高い場合には刈り取り高さ間の差異が狭まること等の新知見を得られたため、学術的意義は大きく、また農業技術として利用できる知見を得たため、社会的意義も大きい。

Report

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

    (8 results)

All 2024 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Remarks (1 results) Patent(Industrial Property Rights) (3 results)

  • [Journal Article] Grain yield response to planting date and cutting height of the first crop in rice ratooning2023

    • Author(s)
      Nakano Hiroshi、Tanaka Ryo、Hakata Makoto
    • Journal Title

      Crop Science

      Volume: 63 Issue: 4 Pages: 2539-2552

    • DOI

      10.1002/csc2.21031

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nonstructural carbohydrate content in the stubble per unit area regulates grain yield of the second crop in rice ratooning2022

    • Author(s)
      Nakano Hiroshi、Tanaka Ryo、Hakata Makoto
    • Journal Title

      Crop Science

      Volume: 62 Issue: 4 Pages: 1603-1613

    • DOI

      10.1002/csc2.20764

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grain yield response to stubble leaf blade clipping in rice ratooning in southwestern Japan2021

    • Author(s)
      Nakano Hiroshi、Tanaka Ryo、Nakagomi Koji、Hakata Makoto
    • Journal Title

      Agronomy Journal

      Volume: 113 Issue: 5 Pages: 4013-4021

    • DOI

      10.1002/agj2.20834

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grain yield response to cultivar and harvest time of the first crop in rice ratooning in southwestern Japan2021

    • Author(s)
      Tanaka Ryo、Hakata Makoto、Nakano Hiroshi
    • Journal Title

      Crop Science

      Volume: 62 Issue: 1 Pages: 455-465

    • DOI

      10.1002/csc2.20645

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Remarks] 良食味多収水稲品種「にじのきらめき」を活用した 再生二期作による画期的多収生産の実現

    • URL

      https://www.naro.go.jp/publicity_report/press/laboratory/karc/159911.html

    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] イネの再生二期作栽培方法2024

    • Inventor(s)
      中野 洋, 田中 良
    • Industrial Property Rights Holder
      国立研究開発法人農業・食品産業技術総合研究機構
    • Industrial Property Rights Type
      特許
    • Acquisition Date
      2024
    • Related Report
      Products Report
  • [Patent(Industrial Property Rights)] イネの再生二期作栽培方法2023

    • Inventor(s)
      中野洋、田中良
    • Industrial Property Rights Holder
      中野洋、田中良
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-084969
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] イネの再生二期作栽培方法2022

    • Inventor(s)
      中野洋、田中良
    • Industrial Property Rights Holder
      中野洋、田中良
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-083913
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2025-03-27  

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