| Project/Area Number |
08454251
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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 |
生態
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| Research Institution | Kagawa University |
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Principal Investigator |
ITINO Takao Kagawa University, Faculty of Education, Associate Professor, 農学部, 助教授 (20176291)
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| Project Period (FY) |
1996 – 1997
|
| Project Status |
Completed (Fiscal Year 1997)
|
| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | ants / symbiosis / coevolution / anti-plants / molecular phylogeny / mitochondrial DNA / coccids / cospeciation |
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| Research Abstract |
The ant phylogeny indicates no sharing of mtDNA types among 9 symbiotic ants, suggesting that inhabitant ants of each Macaranga species have already speciated and formed host rraces. This finding strongly suggest that Macaranga-Crematogaster association is actually one-to-one interaction. Despite the insufficiency offree-living Crematogaster samples, the structure of ant phylogenetic tree indicate that plant-ants have arisen at least twice in subgenera Decacrema and Crematogaster. Based on the assumption that the mean rate of divergence in mtDNA sequences is 2.3 % per million years in arthropods, the age of origin of plant-ant Decacremais estimated to be less than 6 million years.
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