2011 Fiscal Year Final Research Report

Study on spatiotemporal changes of fine genetic structure along with regeneration processes of tree species.

Research Project

Project/Area Number	21380090
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Forest science
Research Institution	The University of Tokyo
Principal Investigator	IDE Yuji 東京大学, 大学院・農学生命科学研究科, 教授 (90213024)
Co-Investigator(Kenkyū-buntansha)	SAITO Yoko 東京大学, 大学院・農学生命科学研究科, 助教 (00302597)
Project Period (FY)	2009 – 2011
Keywords	森林生態 / 保護 / 保全 / 遺伝構造 / 散布様式
Research Abstract	We studied on effects of three different processes of tree regeneration on fine genetic structure within stand ;(1) secondary seed dispersal,(2) overlapping of multi cohorts and(3) completion among individuals.(1) Distance of seed dispersal was prolonged by the secondary dispersal both in Quercus crispula and Fraxinus mandshurica. Then the genetic structure supposed to be weakened by the secondary seed dispersal.(2) Overlapped cohorts weakened the genetic structure within a stand of Stewartia monadelpha.(3) The competition among individuals was severer among siblings than among nonrelated individuals in a young plantation of Betula maximowicziana. Therefore, the strong genetic structure of naturally regenerated even-aged stand of B. maximowiczana will disappears in the early stage of its regeneration.