|Kei Matsubayashi||Last modified date：2022.06.19|
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Reseacher Profiling Tool Kyushu University Pure
Doctor of Philosophy
Country of degree conferring institution (Overseas)
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- Genetic and ecological mechanisms of species diversification caused by adaptive population divergence
keyword : adaptation, evolution, ecological genetics, speciation
- Two closely related flightless species of Japanese beach weevil could demonstrate character displacement both the shape of male copulatory internal sacrum and the elytra coloration. In the project, the first goal is to figure out the condition of character displacement in multiple ecological traits. Further, I aim to test 'cascade reinforcement', which is indirect evolution of reproductive isolation between geographically distant populations of a species by character displacement with other species.
|1.||Kei Matsubayashi, Adaptive radiation and evolution of isolation barriers caused by specialization to different host plants in a phytophagous ladybird beetle, 個体群生態学会, 2017.10, [URL], Adaptive radiation is rapid diversification in a lineage correlating to ecological divergences. Nonetheless of the impact on biodiversity, the ecological and genetic mechanism of such rapid diversification remains unclear. To elucidate evolutionary causes of adaptive radiation, we detected the isolating barriers involved in the earliest stage of adaptive radiation of a phytophagous ladybird beetle, Henosepilachna diekei. Beetle populations collected from 4 host plant species showed highly specialized food acceptance and survivorship on the original host plant irrespective to the phylogenetic relationships. As these populations exhibited relatively weak isolating barrier other than host plant uses, we suggest that divergent host adaptation directly causes adaptive radiation in the species..|
- The Ecological Society Japan
- Society of Evolutionary Studies, Japan
- The Entomological Society of Japan