2013 Fiscal Year Final Research Report
Resolution of a mechanism that maintains male color dimorphism using rearing and wild populations of a cichlid fish
| Project/Area Number |
23370043
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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 |
Biodiversity/Systematics
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| Research Institution | Kyoto University |
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Principal Investigator |
TAKAHASHI Tetsumi 京都大学, 理学(系)研究科(研究院), 研究員 (70432359)
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| Co-Investigator(Kenkyū-buntansha) |
曽田 貞滋 京都大学, 教授 (00192625)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 集団内色彩多型 / 多型維持機構 / 生態遺伝 / 遺伝子探索 / 国際情報交換 / ザンビア共和国 |
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| Research Abstract |
To resolve a mechanism that maintains intra-population polymorphism is directly linked to maintenance of genetic diversity, and is important in evolutionary biology and physiology. I have been studying the mechanism for maintaining polymorphism using a group of cichlid fish that exhibit male color dimorphism.
In this study, I conducted linkage-analysis using a rearing population and association study using a wild population, and found that the gene responsible for the dimorphism is located on a genome region that experiences reduced recombination.
I failed to resolve the ecological mechanism for maintaining the dimorphism. I had a hypothesis that the dimorphism was maintained by disassortative mating, but I didn't find any positive evidence for this hypothesis. Instead, I proposed a new hypothesis, it will be tested in the future.
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