2009 Fiscal Year Final Research Report
Distribution, origin and evolution of Fasciola japonicum in eastern Asia
| Project/Area Number |
18405035
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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 | 海外学術 |
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| Research Field |
Basic veterinary science/Basic zootechnical science
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| Research Institution | Iwate University |
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Principal Investigator |
ITAGAKI Tadashi Iwate University, 農学部, 教授 (80203074)
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| Co-Investigator(Kenkyū-buntansha) |
SHIBAHARA Toshiyuki 千葉科学大学, 薬学部, 教授 (70116937)
AOKI Mikiko 岩手大学, 農学部, 助教 (20302060)
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| Project Period (FY) |
2006 – 2009
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| Keywords | Fasciola / Asia / distribution / origin / evolution |
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| Research Abstract |
Parthenogenic Fasciola species have been known in Japan and Korea. The present study showed that parthenogenic Fasciola sp. also distributed in Vietnam and mainland China, suggesting occurrence throughout Asian countries. Molecular and phylogenical studies based on nuclear ribosomal DNA (ITS1) and mitochondrial DNA (NDI gene) suggested that parthenogenic Fasciola forms came into existence by resulting from interspecific hybridyzation between F.hepatica and F.gigantica and following backcross with the two species, and that they acquired the ability of parthenogenesis. New born parthenogenic Fasciola forms spread out with final hosts such as domestic cattle into neighboring counties as Korea and Japan in the east and Vietnam in the south.
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