2011 Fiscal Year Final Research Report
Studies on effects of the outbreeding depression on reproduction and regeneration of rare tree species grown in wet lands
| Project/Area Number |
21380087
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Forest science
|
|---|
| Research Institution | Hirosaki University |
|---|
Principal Investigator |
ISHIDA Kiyoshi 弘前大学, 農学生命科学部, 准教授 (10343790)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KANAZASHI Ayako 森林総合研究所, 企画部, 室長 (60353645)
KIKUCHI Satoshi 森林総合研究所, 森林遺伝研究領域, 研究員 (10353658)
INOUE Mizuki 秋田県立大学, 生物資源科学部, 助教 (80432342)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SUGIYAMA Shuichi 弘前大学, 農学生命科学部, 教授 (00154500)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Keywords | 森林生態 / 保護 / 保全 / 生態遺伝学 |
|---|
| Research Abstract |
We examined effects of outbreeding depression due to long-distance crossing and inter-population crossing in rare tree species grown in wet lands. Acer pycnunthum trees exhibited outbreeding depression due to inter-population crossing in fitness components at the early life stage (fruit/flower ratio and seed/ovule ratio) and negative correlation between distance between mates and growth increment for its seedlings within a population. On the other hand, Magnolia stellata trees did not exhibit outbreeding depression due to inter-population crossing at the early life stage. The inter-population crossing resulted in positive effects (i.e., heterosis) rather than negative effects (outbreeding depression) on the fitness components of trees in an isolated M. stellata popul ation.
|
