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Physiological characterization of quantitative trait loci involving for biomass production in rice

Research Project

Project/Area Number 25870780
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Crop production science
Science in genetics and breeding
Research InstitutionToyo University

Principal Investigator

Hirotsu Naoki  東洋大学, 生命科学部, 准教授 (40584389)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords量的形質遺伝子座 / 成長解析 / 窒素吸収 / ショ糖リン酸合成酵素 / 初期生育 / 乾物生産 / 染色体断片置換系統 / ショ糖リン酸合成酵素(SPS) / 窒素吸収速度 / イネ
Outline of Final Research Achievements

I investigated the growth mechanism of rice by quantitative trait locus (QTL) analysis. Four QTLs associated with increased in plant growth rate were identified which were derived from ‘Kasalath’ alleles on chromosomes 1, 6, 8 and 12. This was achieved by evaluating the net dry weight gain between two developmental points. Physiological analysis revealed that the QTL on chromosome 1 (qEGR1) increased the relative growth rate (RGR) by enhancing the net assimilation rate (NAR). High RGR and NAR were facilitated by an increase in gene expression of OsSPS1 that encodes the rate-limiting enzyme in sucrose synthesis. In contrast, QTLs on chromosomes 6, 8 and 12 (qEGR6, qEGR8 and qEGR12) were associated with an increase in uptake of NH4+, the major nitrogen source for rice. These results suggest that growth mechanism is controlled by multiple traits but sucrose biosynthesis and NH4+ uptake play the key role in determining early growth rate of rice plant.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (10 results)

All 2015 2014 2013 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (7 results) (of which Invited: 2 results)

  • [Int'l Joint Research] University of Southern Queensland(オーストラリア)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Comparative analysis of N-glycans in the ungerminated and germinated stages of Oryza sativa.2015

    • Author(s)
      Risa Horiuchi, Naoki Hirotsu and Nobumitsu Miyanishi.
    • Journal Title

      Carbohydrate Research

      Volume: 418 Pages: 1-8

    • DOI

      10.1016/j.carres.2015.09.008

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield.2013

    • Author(s)
      Ken Ishimaru, Naoki Hirotsu, Yuka Madoka, Naomi Murakami, Nao Hara, Haruko Onodera, Takayuki Kashiwagi, Kazuhiro Ujiie, Bun-ichi Shimizu, Atsuko Onishi, Hisashi Miyagawa & Etsuko Katoh.
    • Journal Title

      Nature Genetics

      Volume: 45 Issue: 6 Pages: 707-711

    • DOI

      10.1038/ng.2612

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 機能欠失型TGW6のソース器官における機能と高温登熟障害回避へ果たす役割2015

    • Author(s)
      竹村ほづみ、清水順平、氏家和広、石丸健、廣津直樹
    • Organizer
      日本作物学会第239回講演会
    • Place of Presentation
      日本大学湘南キャンパス(神奈川県藤沢市)
    • Year and Date
      2015-03-27 – 2015-03-28
    • Related Report
      2014 Research-status Report
  • [Presentation] The genetic control of rice yield using novel genes.2015

    • Author(s)
      Naoki Hirotsu
    • Organizer
      2nd Ruhuna International Science & Technology Conference
    • Place of Presentation
      University of Ruhuna, Matara, Sri Lanka
    • Year and Date
      2015-01-22 – 2015-01-23
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] イネの生長時における糖鎖構造の挙動2014

    • Author(s)
      堀内里紗、遠坂翼、廣津直樹、宮西伸光
    • Organizer
      第33回日本糖質学会年会
    • Place of Presentation
      名古屋大学(名古屋市)
    • Year and Date
      2014-08-11 – 2014-08-12
    • Related Report
      2014 Research-status Report
  • [Presentation] コメ種子由来レクチンの特性解析2014

    • Author(s)
      遠坂翼、堀内里紗、廣津直樹、宮西伸光
    • Organizer
      第33回日本糖質学会年会
    • Place of Presentation
      名古屋大学(名古屋市)
    • Year and Date
      2014-08-10 – 2014-08-12
    • Related Report
      2014 Research-status Report
  • [Presentation] イネの初期生育速度に関与する要因の生理学的解析2014

    • Author(s)
      永井雄基、砂川裕貴、望月麻衣、廣津直樹
    • Organizer
      日本植物生理学会
    • Place of Presentation
      富山大学(富山)
    • Related Report
      2013 Research-status Report
  • [Presentation] カサラス型OsSPS1 をもつ染色体断片置換系統イネの生育およびガス交換速度の解析2013

    • Author(s)
      永井雄基、廣津直樹
    • Organizer
      日本作物学会
    • Place of Presentation
      鹿児島大学(鹿児島)
    • Related Report
      2013 Research-status Report
  • [Presentation] The genetic control of rice yield through gleaning superior genes.2013

    • Author(s)
      Naoki Hirotsu
    • Organizer
      7th International Rice Genetics Symposium.
    • Place of Presentation
      Manila, Philippine
    • Related Report
      2013 Research-status Report
    • Invited

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Published: 2014-07-25   Modified: 2019-07-29  

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