Modeling of genotypic and environmental variation in panicle number of rice

• Project/Area Number: 22580021
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Crop science/Weed science
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: YOSHIDA Hiroe 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター情報利用研究領域, 研究員 (90546920)
• Co-Investigator(Kenkyū-buntansha): OHSUMI Akihiro 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター水田利用研究領域, 研究員 (80455310)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 水稲 / 分げつ / 群落光環境 / モデル

Research Abstract

Field experiments utilizing a red light control system showed that improving R/FR ratio in the lower part of the rice canopy had no remarkable effect on the change in tiller number after the maximum tillering stage. Although the disappearance time of the soil ammonium nitrogen roughly matched with maximum tillering stage of rice, the abundant nitrogen absorption at maximum tillering stage did not increase tiller number.