Induction of seedlessness in seeded grape cultivars Niagara and Concord

Research Project

Project/Area Number	22580031
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Horticulture/Landscape architecture
Research Institution	Chiba University
Principal Investigator	OHARA Hitoshi 千葉大学, 環境健康フィールド科学センター, 准教授 (40160931)
Co-Investigator(Kenkyū-buntansha)	OHKAWA Katsuya 千葉大学, 園芸学研究科, 助教 (00312934)
Project Period (FY)	2010 – 2012
Project Status	Completed (Fiscal Year 2012)
Budget Amount *help	¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000) Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000) Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords	園芸学 / 果樹 / ブドウ / 無種子化 / 植物ホルモン
Research Abstract	GA3 treatment can induce almost 100% seedlessness in such seeded cultivars as Delaware, but not in such cultivars as Niagara and Concord. From a practicalstandpoint, we found that the application of GA3 at 300 mg・ L-1 in combination withforchlorfenuron (CPPU) at 10 mg・L-1 14 days before full bloom is appropriate for theinduction of seedlessness in Niagara and Concord. We guessed that embryo sac development is not severely inhibited by GA3 in both cultivars. At present stage, 1t is extremely difficult to induce seedlessness of Niagara because streptomycin added to GA3 or GA3 +CPPU solutions did not much improve seedlessness of Niagara.