Elucidating genetic factors in root traits and growth of Cryptomeria japonica

• Project/Area Number: 24780160
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: OHIRA Mineko 国立研究開発法人森林総合研究所, 林木育種センター, 主任研究員 (40370861)
• Research Collaborator: HANAOKA So 国立研究開発法人森林総合研究所, 林木育種センター北海道育種場, 主任研究員 ; HIRAOKA Yuichiro 国立研究開発法人森林総合研究所, 林木育種センター, 室長 ; MIURA Masahiro 国立研究開発法人森林総合研究所, 林木育種センター関西育種場, 室長 ; IKI Taiichi 国立研究開発法人森林総合研究所, 林木育種センター東北育種場, 室長 ; WATANABE Atsushi 九州大学, 大学院・農学研究院, 准教授
• Project Period (FY): 2012-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 根系 / 形質 / 育種 / 樹木根 / 不定根 / さし木 / スギ

Outline of Final Research Achievements

To obtain insights to improve Cryptomeria japonica root traits, I investigated the root system and their growth traits of the C. japonica cuttings and mature trees. The root traits of cuttings were affected by environmental conditions such as the physical and chemical properties of soil, and leaf area of cuttings. The difference in root traits among clones were large even after removing the influence of environmental conditions. The root traits of cuttings were positively correlated with that of mature trees. Besides, the traits of cuttings common to clones with superior above-ground growth were high amount of fine root and high TR ratio. These findings suggested that to increase fine roots production with less resources enhance above-ground growth, and the traits can be estimated at the stage of rooted cuttings.

Research Products

• [Journal Article] Effects of Physical Characteristics of Rooting Media on the Rooting of <i>Cryptomeria japonica</i> Cuttings (2016)
  • Author(s): 大平峰子，花岡創，平岡裕一郎，栗田学，井城泰一，三浦真弘，渡辺敦史
  • Journal Title: Journal of the Japanese Forest Society Volume: 98 Issue: 6 Pages: 265-272
  • DOI: 10.4005/jjfs.98.265
  • NAID: 130005243425
  • ISSN: 1349-8509, 1882-398X
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] スギ林における根密度のクローン間変異 (2017)
  • Author(s): 大平峰子，花岡創，平岡裕一郎，渡辺敦史
  • Organizer: 第128回日本森林学会大会
  • Place of Presentation: 鹿児島大学（鹿児島県鹿児島市）
  • Year and Date: 2017-03-26
• [Presentation] スギさし木苗の根系成長におけるクローン間変異 (2016)
  • Author(s): 大平峰子、花岡創、平岡裕一郎、渡辺敦史
  • Organizer: 第127回日本森林学会大会
  • Place of Presentation: 日本大学生物資源科学部（神奈川県藤沢市）
  • Year and Date: 2016-03-27
• [Presentation] スギさし木苗の根系におけるクローン間差異 (2015)
  • Author(s): 大平峰子、花岡創、平岡裕一郎、渡辺敦史
  • Organizer: 第４３回根研究集会
  • Place of Presentation: 東京農業大学（神奈川県厚木市）
  • Year and Date: 2015-09-30
• [Presentation] スギのさし木発根性の季節変動とその要因 (2015)
  • Author(s): 大平峰子、花岡創、平岡裕一郎、栗田学、渡辺敦史
  • Organizer: 日本森林学会
  • Place of Presentation: 北海道大学（札幌市）
  • Year and Date: 2015-03-26 – 2015-03-29
• [Presentation] Clonal variations in the root traits of Japanese cedar and isolation of EST related to root development (2014)
  • Author(s): Ohira, M., Tamura, M., Hanaoka, S., Iki, T., Hiraoka, Y., Kurita, M. and Watanabe, A.
  • Organizer: 6th International symposium on physiological processes in roots of woody plants
  • Place of Presentation: 名古屋大学（名古屋市）
  • Year and Date: 2014-09-08 – 2014-09-13
• [Presentation] 関東育種基本区におけるスギ精英樹のさし木発根性の評価 (2014)
  • Author(s): 井城泰一・平岡裕一郎・大平峰子・小野雅子・渡辺敦史
  • Organizer: 第125回日本森林学会
  • Place of Presentation: 大宮ソニックシティ
• [Presentation] 土壌がスギさし木に与える影響評価 (2013)
  • Author(s): 小野雅子・大平峰子・渡辺敦史
  • Organizer: 第124回日本森林学会
  • Place of Presentation: 岩手大学（岩手県盛岡市）