Verification of growth-reproduction trade-offs in Japanese larch in relation to environmental variation

• Project/Area Number: 17K15291
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Forest Research and Management Organization
• Principal Investigator: Matsushita Michinari 国立研究開発法人森林研究・整備機構, 森林総合研究所 林木育種センター, 主任研究員 (70624899)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: カラマツ / 繁殖 / 環境適応 / UAV / 機械学習 / 森林科学 / 生態学 / 地理的変異

Outline of Final Research Achievements

We collected data on the reproduction and growth traits in Japanese larch, and evaluated their adaptability to the local environment. The differences among clones and among provenances in growth and reproductive traits and their geographic trends were evaluated. As a result, there was a significant variation among clones in growth traits, and a relatively large variance component of genetic-environment interactions were also detected. There was also a significant variation among clones in reproductive traits (both of male and female cone production). Based on the estimates of genetic performance of each clone, this study detected geographical trends (cline) for both growth and reproductive traits.

Academic Significance and Societal Importance of the Research Achievements

成長と繁殖にトレードオフが存在する場合、成長の良い系統は採種園で着花しにくいという危惧が想定されるが、本研究結果よりその懸念はそれほど大きくない可能性が示唆された。本成果は、成長に優れた系統を選ぶことと採種園における繁殖性を両立できる可能性を示唆しており、カラマツ育種事業を進めるうえで有益な知見を提供できたと考えられる。

Research Products

• [Journal Article] Effects of Light Intensity and Girdling Treatments on the Production of Female Cones in Japanese Larch (Larix kaempferi (Lamb.) Carr.): Implications for the Management of Seed Orchards (2020)
  • Author(s): Matsushita Michinari、Nishikawa Hiroki、Tamura Akira、Takahashi Makoto
  • Journal Title: Forests Volume: 11 Issue: 10 Pages: 1110-1110
  • DOI: 10.3390/f11101110
  • Peer Reviewed / Open Access
• [Presentation] 二ホンカラマツにおける展葉・落葉フェノロジーの変異 (2020)
  • Author(s): 松下通也・田村明
  • Organizer: 第67回森日本生態学会大会
• [Presentation] 環状剥皮したカラマツ採種木の着果促進効果の継続性について (2019)
  • Author(s): 西川浩己・神戸陽一・小林正男・羽田直美・三浦充・渡辺真紀子・松下通也・田村明
  • Organizer: 第130回日本森林学会大会
• [Presentation] 採種園に補植したカラマツ若齢接ぎ木苗の着花特性 (2018)
  • Author(s): 田中功二・松下通也・田村 明
  • Organizer: 第7回森林遺伝育種学会大会
• [Presentation] カラマツ属における光環境の改善による着花促進 (2018)
  • Author(s): 松下通也
  • Organizer: カラマツ育種技術連絡会
• [Presentation] UAVを活用したカラマツ等の樹木個体の着果評価手法の検討 (2018)
  • Author(s): 松下通也・田村明
  • Organizer: 第65回日本生態学会大会
• [Presentation] 明るさ等の採種園環境に対するカラマツの着果性のクローン間変異 (2017)
  • Author(s): 松下通也・西川浩己・田村明
  • Organizer: 第6回森林遺伝育種学会大会
• [Presentation] Variation among clones in the inter-annual reproductive fluctuation of Japanese larch (Larix kaempferi) in relation to climatic factors (2017)
  • Author(s): Michinari Matsushita、Akira Tamura、Masatoshi Ubukata
  • Organizer: IUFRO Seed Orchard Conference 2017
  • Int'l Joint Research