Effects of long-term human activities on the spatial and temporal genetic compositions of Cinnamomum camphora

Research Project

Project/Area Number	24710276
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Resource conservation science
Research Institution	Tokyo University of Agriculture
Principal Investigator	Kameyama Yoshiaki 東京農業大学, 地域環境科学部, 教授 (10447047)
Co-Investigator(Renkei-kenkyūsha)	SUZUKI Kojiro 東京農業大学, 地域環境科学部, 教授 (80256643)
Project Period (FY)	2012-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000) Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords	有用樹木 / 遺伝的地域性 / 遺伝子移入 / クスノキ / SSRマーカー / 遺伝的攪乱
Outline of Final Research Achievements	Cinnamomum camphora has long been utilized by human-beings, which makes the natural geographic distribution of this tree unclear. The genetic analysis and field survey revealed that Japanese C. camphora populations held unique genetic composition and regeneration ability, but their genetic diversities were less than half those of Chinese and Taiwanese populations probably because of post-glacial bottleneck events. It should be noted that several individuals less than 100 cm of diameter at breast height were genetically admixed between regions (Japan vs. China and Taiwan), indicating the occurrence of human-induced genetic contaminations over several decades.