Date of Award
Master of Science (MS)
Larvae--Physiology., Drosophila mojavensis--Speciation., Evolution (Biology)
Ecological host shifts likely have a major impact on the evolution of species. The host shift can result in an organism being faced with significant chemical, nutritional, volumetric, and other challenges, which may lead to adaptation. Host shifts can lead to speciation by prezygotic isolation, and even reinforcement through postzygotic isolation. This study looks at behavioral differences in terms of larval activity in populations of Drosophila mojavensis which have experienced host shifts. The mean speed of the four populations of D. mojavensis larvae were measured, and considered in the ecological context. A single nucleotide polymorphism (SNP) DNA library was prepared using advance intercross lines (AIL) for a future quantitative trait loci (QTL) analysis. A significant difference was found between all four of the D. mojavensis populations. The presence of differences in larval activity between populations of D. mojavensis provides an opportunity to look factors influencing adaptation during host shifts.
Coleman, Joshua, "Variation in larval behavior across the ecologically distinct host populations of the cactophilic Drosophila mojavensis" (2017). Theses. 205.