Resolution of a mechanism that maintains male color dimorphism using rearing and wild populations of a cichlid fish

解决种群内遗传多样性的维持机制直接关系到遗传多样性的维持，在进化生物学和生理学中具有重要意义。我一直在利用一群表现出雄性颜色二态的池鱼来研究保持多态的机制。在本研究中，我利用饲养群体进行了连锁分析，并利用野生群体进行了关联研究，发现导致二态的基因位于基因组重组减少的区域，未能解决维持二态的生态学机制。我有一个假设，即这种二态现象是通过错配交配来维持的，但我没有找到任何支持这一假设的积极证据。相反，我提出了一个新的假设，它将在未来得到检验。

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.