Ecophysiological and genetic studies on drought response index in cereal crops

• Project/Area Number: 23380011
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Crop production science
• Research Institution: The University of Tokyo
• Principal Investigator: Kamoshita Akihiko 東京大学, アジア生物資源環境研究センター, 准教授 (10323487)
• Co-Investigator(Kenkyū-buntansha): 高野 哲夫 東京大学, アジア生物資源環境研究センター, 教授 (30183057) ; 根本 圭介 東京大学, 農学生命科学研究科, 教授 (40211461)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000); Fiscal Year 2014: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2011: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
• Keywords: ストレス / 生態学 / 遺伝学 / 植物 / 環境 / 耐乾性 / 旱魃 / 作物生理生産学 / 国際研究者交流 / インド / 作物 / イネ

Outline of Final Research Achievements

Drought response index (DRI) of rice (Oryza sativa L.) was quantified by using various varieties, 3 mapping populations, and near-isogenic lines of Koshihikari and IR64 with heading date and root trait genes/QTLs to dissect its physiological and genetic mechanisms. In the rice variety experiments, DRI was positively related with harvest index, fertility and biomass production under drought treatment and negatively with percentage of infertile panicles, delay in heading, and reduction in plant height. In the mapping population experiments, QTLs for DRI were detected in RM6911-RM6379 in chromosome 2, around RM5953 in chromosome 4, and 2 loci in chromosome 8. Epistasis and QTL by environment interaction for DRI were significant. In the near-isogenic line experiments, DRI increased by the introgression of DEEPER ROOTING 1, a gene to modify root growth angle toward steeper in response to gravity, and Stele Transversal Area 1, a QTL to enlarge transversal area of stele.

Research Products

• [Journal Article] Current Status of Research on Improvement of Drought Resistance in Rice (Oryza sativa L.) (2011)
  • Author(s): 鴨下顕彦
  • Journal Title: Japanese Journal of Crop Science Volume: 80 Issue: 1 Pages: 1-12
  • DOI: 10.1626/jcs.80.1
  • NAID: 130004461867
  • ISSN: 0011-1848, 1349-0990
  • Peer Reviewed
• [Presentation] 荒川流域宗岡地区におけるイネ品種IR64とコシヒカリの準同質遺伝系統の節水型早期落水栽培の事例研究 (2014)
  • Author(s): 柳沼草介, Deshmukh Vivek, 鴨下顕彦
  • Organizer: 日本作物学会関東支部第103回講演会
  • Place of Presentation: 農林水産技術会議事務局筑波事務所(茨城県、つくば市）
  • Year and Date: 2014-12-05
• [Presentation] Preliminary evaluation of δ13C among rice genotypes with different root and phenology traits under droughted upland fields (2014)
  • Author(s): Vivek Deshmukh, Mariko Norisada, Tong Ly, Poornima Ramalingam, Uga Yusaku, Yano Masahiro, Akihiko Kamoshita
  • Organizer: 日本作物学会第238回講演会
  • Place of Presentation: 愛媛大学(愛媛県、松山市)
  • Year and Date: 2014-09-09 – 2014-09-10
• [Presentation] Reponses of two japonica x japonica mapping populations under prolonged drought and rewatering (2013)
  • Author(s): Ramalingam Poornima, Ly Tong, Manabe Tohru, Nemoto Keisuke, Kamoshita Akihiko
  • Organizer: InterDrought IV
  • Place of Presentation: パース（オーストラリア）
• [Presentation] Responses of near isogenic lines of IR64 and Koshihikari introgressed with root angle or heading date to prolonged drought (2013)
  • Author(s): Ly Tong, Ramalingam Poornima, Uga Yusaku, Yano Masahiro, Kamoshita Akihiko
  • Organizer: InterDrought IV
  • Place of Presentation: パース（オーストラリア）
• [Presentation] 南インド・タミルナードゥ州における稲作研究とサステイナビリティ (2013)
  • Author(s): 鴨下顕彦
  • Organizer: AGS研究会報告会
  • Place of Presentation: 東京大学（東京）
• [Presentation] IR64とコシヒカリの準同質遺伝子系統の長期旱魃と再灌水への応答 (2013)
  • Author(s): 鴨下顕彦
  • Organizer: 第235回日本作物学会講演会
  • Place of Presentation: 川崎（明治大学）
• [Presentation] イネ2集団の長期旱魃と再潅水に対する旱魃応答指数の解析 (2012)
  • Author(s): 鴨下顕彦
  • Organizer: 第234回日本作物学会講演会
  • Place of Presentation: 仙台（東北大学）
• [Presentation] イネマッピング集団オトメモチ/ゆめのはたもちにおける長期旱魃と再灌水への応答 (2012)
  • Author(s): Ly Tong, Ramalingam Poornima, 鴨下 顕彦
  • Organizer: 日本作物学会第233回講演会
  • Place of Presentation: 東京農工大学、東京
• [Book] アジアの生物資源環境学 (2013)
  • Author(s): 鴨下顕彦（分担執筆）
  • Total Pages: 244
  • Publisher: 東京大学出版会
• [Book] 作物学 (2013)
  • Author(s): 鴨下顕彦（分担執筆）
  • Total Pages: 312
  • Publisher: 文永堂
• [Remarks] 東京大学アジア生物資源環境研究センター地域資源評価研究室ホームページ
  • URL: http://region.anesc.u-tokyo.ac.jp/reseach%20theme.html
• [Remarks] 穀物の旱魃応答指数の生理・遺伝・生態学的解明(2011-2014)
  • URL: http://region.anesc.u-tokyo.ac.jp/reseach%20theme.html
• [Remarks] 穀物の旱魃応答指数の生理・遺伝・生態学的解明(2011-2014)(英語)
  • URL: http://region.anesc.u-tokyo.ac.jp/e_reseach%20theme.html
• [Remarks] Research Key Words
  • URL: http://region.anesc.u-tokyo.ac.jp/index.html
• [Remarks] 研究キーワード 稲作と水資源 Rice and Water
  • URL: http://region.anesc.u-tokyo.ac.jp/index.html