2011 Fiscal Year Final Research Report
Studies on the origin of exotic loaches and their impact on indigenous species
| Project/Area Number |
21380114
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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 |
General fisheries
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| Research Institution | Hokkaido University |
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Principal Investigator |
ARAI Katsutoshi 北海道大学, 大学院・水産科学研究院, 教授 (00137902)
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| Co-Investigator(Kenkyū-buntansha) |
MURAKAMI Masaru 麻布大学, 獣医学部, 教授 (80271360)
YABE Mamoru 北海道大学, 大学院・水産科学研究院, 教授 (80174572)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 倍数体 / クローン / ミトコンドリアDNA / 反復配列 / マイクロサテライト / 交雑 / FISH / 生物多様性保全 |
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| Research Abstract |
Loaches collected in Japan and adjacent area were genetically characterized by chromosome observation, genome size estimation and sequence analyses of mitochondrial and nuclear DNA markers. As a result, Japanese market samples were genetically identical or very similar to those distributed in China. As artificial inter-specific hybrids between indigenous loach and exotic mud loach species exhibit fertility in females, genetic contamination is worried in Japanese wild populations.
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