| 要旨トップ | 目次 | | 日本生態学会第59回全国大会 (2012年3月,大津) 講演要旨 ESJ59/EAFES5 Abstract |
一般講演(ポスター発表) P3-130J (Poster presentation)
Genetic diversity is essential for every organism to adapt to changing environment. The mechanism of how genetic diversity is maintained in natural populations has been studied for a long time, and recently, the role of evolutionary capacitor has attracted a lot of attention. An evolutionary capacitor buffers genetic and environmental perturbations and keeps genetic variation cryptic, accumulating mutations in a population. So far, only Hsp90, one of the molecular chaperone genes, has been studied as a candidate for an evolutionary capacitor. In the current study, I used Drosophila melanogaster as a study material, and searched for genomic regions that regulated natural genetic variation in wing morphology using isogenic deficiency strains. As a result, multiple genomic regions were shown to affect quantitative genetic variation and significantly increased broad-sense heritability of wing shape. In addition, several genomic deletions revealed qualitative cryptic genetic variation in wing morphology such as extra wing compartment, lack of wing vein etc. These results indicate the existence of multiple capacitors for natural genetic variation, and the genomic regions with effect on natural genetic variation may encompass candidate genes for evolutionary capacitors.