[W02] 実験室で進化する昆虫 -実験進化/人為選抜を議論する-

[W02-02] 人為選択実験：ミバエと甲虫での研究事例紹介

◯Takahisa Miyatake¹ (1. Okayama University)

First, I will outline what artificial selection is. Then, I will explain what should be considered when performing artificial selection. Next, I will introduce the results of my artificial selection experiments using cucurbit flies and beetles. When artificial selection was applied to the length of the developmental period of cucurbit flies, the time of mating in response to selection changed in a correlated manner. This was due to a mutation in the gene that constitutes the circadian clock. When artificial selection was applied at the onset of female reproductive age, the lifespan of the female was also altered, indicating a trade-off between reproduction and lifespan. Experiments with the azuki weevil showed a genetic correlation between flight and pretending to be dead. By applying fractional selection to the dead-flying duration of the cockatoo weevil, we were able to establish strains that play dead for long periods of time and strains that do not play dead. These strains gave us the opportunity to learn about the advantages and disadvantages of playing dead from the perspective of fitness.