Clarification of key genes for rice domestication

• Project/Area Number: 20580005
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Breeding science
• Research Institution: Kobe University
• Principal Investigator: ISHII Takashige Kobe University, 大学院・農学研究科, 教授 (20260648)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: イネ / 栽培化 / 穂の開帳性 / 種子脱粒性 / Oryza sativa / Oryza rufipogon / 連鎖地図

Research Abstract

In order to clarify key genes for rice domestication, the agronomical effects of non-spreading panicles of cultivated rice were analyzed. Near-isogenic lines for non-spreading panicles in the genetic background of wild rice were subjected to the field experiments. As a result, plants with closed panicles showed significantly reduced seed-shattering and outcrossing rates. These results suggests that a simple morphological change in panicle shape had a large impact on seed-shattering and pollinating behaviors and a strong influence on rice domestication.

Research Products

• [Journal Article] Development of backcross recombinant inbred lines between Oryza sativa Nipponbare and O.rufipogon and QTL detection on drought tolerance (2011)
  • Author(s): Thanh P.T., Phan P.D.T., Mori N., Ishikawa R., Ishii T.
  • Journal Title: Breeding Science 61巻 Pages: 76-79
  • Peer Reviewed
• [Journal Article] Development of backcross recombinant inbred lines between Oryza sativa Nipponbare and O.rufipogon and QTL detection on drought tolerance (2011)
  • Author(s): Pham Thien Thanh
  • Journal Title: Breeding Science Volume: 61 Pages: 76-79
  • Peer Reviewed
• [Journal Article] QTL analysis for flowering time using backcross population between Oryza sativa Nipponbare and O.rufipogon (2010)
  • Author(s): Thanh P.T., Phan P.D.T., Ishikawa R., Ishii T.
  • Journal Title: Genes & Genetic Systems 85巻 Pages: 273-279
  • Peer Reviewed
• [Journal Article] Allelic interaction at seed-shattering loci in the genetic backgrounds of wild and cultivated rice species. (2010)
  • Author(s): Ishikawa R., Thanh P.T., Nimura N., Htun T.M., Yamasaki M, Ishii T.
  • Journal Title: Genes & Genetic Systems 85巻 Pages: 265-271
  • NAID: 10029515338
  • Peer Reviewed
• [Journal Article] QTL analysis for flowering time using backcross population between Oryza sativa Nipponbare and O.rufipogon (2010)
  • Author(s): Pham Thien Thanh
  • Journal Title: Genes & Genetic Systems Volume: 85 Pages: 273-279
  • Peer Reviewed
• [Journal Article] Allelic interaction at seed-shattering loci in the genetic backgrounds of wild and cultivated rice species (2010)
  • Author(s): Ryo Ishikawa
  • Journal Title: Genes & Genetic Systems Volume: 85 Pages: 265-271
  • Peer Reviewed
• [Presentation] QTL analysis for submergence avoidance using backcross recombinant inbred lines between Oryza sativa and O.rufipogon. (2010)
  • Author(s): Phan, P.D.T., Thanh, P.T., 森直樹, 石川亮, 石井尊生
  • Organizer: 近畿作物・育種研究会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-12-04
• [Presentation] Evaluation of seed-shattering degree of substitution lines having two non-shattering genes from cultivated rice (Oryza sativa) in the genetic background of wild rice (O.rufipogon). (2010)
  • Author(s): Htun, T.M., 石川亮, 石井尊生
  • Organizer: 近畿作物・育種研究会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-12-04
• [Presentation] QTL analysis for submergence avoidance using backcross recombinant inbred lines between Oryza sativa and O.rufipogon (2010)
  • Author(s): Phuong Dang Thai Phan
  • Organizer: 近畿作物・育種研究会
  • Place of Presentation: 大阪府立大学(大阪府)
  • Year and Date: 2010-12-04
• [Presentation] Temporal changes of seed shattering degree of substitution lines having non-shattering alleles from cultivated rice (Oryza saliva) in the genetic backeround of wild rice (O.rufipogon) (2010)
  • Author(s): Than Mynt Htun
  • Organizer: 近畿作物・育種研究会
  • Place of Presentation: 大阪府立大学(大阪府)
  • Year and Date: 2010-12-04
• [Presentation] Estimation of outcrossing rate of Asian wild rice, Oryza rufipogon, under field condition. (2010)
  • Author(s): Phan P.D.T., Kageyama H., Ishikawa R., Ishii T.
  • Organizer: 日本育種学会
  • Place of Presentation: 京都大学
  • Year and Date: 2010-03-27
• [Presentation] Estimation of outcrossing rate of Asian wild rice, Oryza rufipogon under field condition (2010)
  • Author(s): Phan Dang Thai Phuong
  • Organizer: 日本育種学会第117回講演会
  • Place of Presentation: 京都大学(京都府)
  • Year and Date: 2010-03-27
• [Presentation] Evaluation of genetic diversity among wild rice populations of Oryza rufipogon in Myanmar and Cambodia. (2009)
  • Author(s): 石井尊生
  • Organizer: International Symposium on Wild Rice
  • Place of Presentation: Bangkok, Thailand
  • Year and Date: 2009-11-23
• [Presentation] Evaluation of genetic diversity among wild rice populations of Oryza rufipogon in Myanmar and Cambodia (2009)
  • Author(s): Takashige Ishii
  • Organizer: International Symposium on Wild Rice
  • Place of Presentation: Sofitel Hotel(Thailand)
  • Year and Date: 2009-11-23
• [Presentation] QTL analysis for useful agronomic characters using backcross inbred lines between Oryza rufipogon and O.sativa Japonica Nipponbare. (2009)
  • Author(s): Thanh, P.T., Ishikawa R., Mori N., Ishii T.
  • Organizer: 6th International Rice Genetic Symposium
  • Place of Presentation: Manila, Philippines
  • Year and Date: 2009-11-17
• [Presentation] QTL analysis for useful agronomic characters using backcross inbred lines between Oryza rufipogon and O.sativa Japonica Nipponbare (2009)
  • Author(s): Pham Thien Thanh
  • Organizer: 6th International rice Genetic Symposium
  • Place of Presentation: Manila Hotel(Philippines)
  • Year and Date: 2009-11-17