Estimation of genetic mechanism to prevent root and stem bendig and statistical model building to predict their genetic ability.

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05691
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 40010:Forest science-related
• Research Institution: Shizuoka University (2023); Forest Research and Management Organization (2021-2022)
• Principal Investigator: Hanaoka So 静岡大学, 農学部, 准教授 (40598728)
• Co-Investigator(Kenkyū-buntansha): 田邊 純 千葉大学, 教育学部, 助教 (40800636)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 根元曲がり / 幹曲がり / アカエゾマツ / 抵抗性育種 / 材質 / 初期成長

Outline of Final Research Achievements

Factors causing the family variation of stem and basal bending was analyzed in this study. We made hypotheses that initial tree growth or wood traits to resist snow pressure affect to the probability of occurrence of stem and basal bending, and they were examined by using family and clonal materials of Picea glehnii. Families which had higher resistance to stem and basal bending tended to have higher initial tree growth or wood properties, the results supporting our original hypothesis. These results also suggest that conventional forest tree breeding strategy which select fast growing and higher wood properties contribute to select higher resistance trees for stem and basal bending.

Free Research Field

林木育種学

Academic Significance and Societal Importance of the Research Achievements

根元曲がりや幹曲がりは、積雪地域の林業において材価を損なう深刻な問題の一つである。これまで、根元曲がりや幹曲がりの発生に関して家系間変異があることは複数の研究が提示してきたが、その変異を生み出すメカニズムに迫った研究は非常に少ない。本研究は、雪圧に耐え得るサイズに早く到達する初期成長、あるいは、雪圧による曲がりを生じにくくする材の剛性が曲がりへの抵抗性に家系間変異を生む要因となることを示した。また、アカエゾマツについて、本研究で用いた家系と比較することで抵抗性の予測を可能とし、積雪地域の林業に適した品種の選抜に貢献し得る成果を得た。