Effects of sex change in maple trees on forest regeneration

2013 Fiscal Year Final Research Report

• Project/Area Number: 20580159
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Forest science
• Research Institution: Osaka City University
• Principal Investigator: NANAMI Satoshi 大阪市立大学, 理学(系)研究科(研究院), 准教授 (70326247)
• Co-Investigator(Kenkyū-buntansha): ITOH Akira 大阪市立大学, 大学院理学研究科, 教授 (40274344)
• Project Period (FY): 2008-04-08 – 2013-03-31
• Keywords: 森林 / 生態 / 個体群 / 繁殖 / 更新動態 / 性表現

Research Abstract

The spatial genetic structure, gene flow through pollination and relatedness between parents of seeds were investigated in an Acer rufinerve population, a dioecious tree. The efficiency of the sex expression, dioecy, was evaluated by estimating selfing rate of bisexual A. rufinerve trees. The A. rufinerve population has a significant spatial genetic structure. The spatially close trees tended to have a similar genotypes. The short-distant gene flows through pollination were dominant, and selfing rate of bisexual trees was high (75%). It means self incompatibility was low in this species. The sex expression, dioecy, would be efficient in A. rufinerve to avoid selfing and inbreeding depression.