| Project/Area Number |
21380087
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | Hirosaki University |
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Principal Investigator |
ISHIDA Kiyoshi 弘前大学, 農学生命科学部, 准教授 (10343790)
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| 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)
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| Co-Investigator(Renkei-kenkyūsha) |
SUGIYAMA Shuichi 弘前大学, 農学生命科学部, 教授 (00154500)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2011: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2010: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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| Keywords | 森林生態 / 保護 / 保全 / 生態遺伝学 / 異型交配弱勢 / ハナノキ / 遠距離交配 / 雑種崩壊 / シデコブシ / コブシ / 浸透交雑 / 異系交配弱勢 / 希少種 / 集団間交配 / 遺伝的荷重 / 保全管理 / ヘテロシス / 小集団 / 遺伝的かく乱 / 希少樹木 / 繁殖 / 遺伝構造 / 葉緑体SSR / ハプロタイプ |
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| 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.
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