Melanic pigmentation and light preference within and between two Drosophila species

作者：Arielle M. Cooley, Suzanne Schmitz, E. Cabrera, Mitchell Cutter, Maxwell Sheffield, Ian K. Gingerich, G Thomas, Calvin N. M. Lincoln, Virginia H. Moore, Alexandra E. Moore, Sarah Davidson, Nikhil Lonberg, Eli B. Fournier, Sophia M. Love, Galen Posch, Matthew B. Bihrle, Spencer D. Mayer, Kuenzang Om, Lauren Wilson, Casey Q. Doe, Chantalle E. Vincent, Elizabeth R. T. Wong, Ilona Wall, Jarred Wicks, Stephon Roberts · 发表于：Ecology and Evolution · 年份：2021 · DOI：10.1002/ece3.7998 · 被引用次数：1 · 研究领域：Plant and animal studies、Insect Utilization and Effects、Neurobiology and Insect Physiology Research

Abstract Environmental adaptation and species divergence often involve suites of co‐evolving traits. Pigmentation in insects presents a variable, adaptive, and well‐characterized class of phenotypes for which correlations with multiple other traits have been demonstrated. In Drosophila , the pigmentation genes ebony and tan have pleiotropic effects on flies' response to light, creating the potential for correlated evolution of pigmentation and vision. Here, we investigate differences in light preference within and between two sister species, Drosophila americana and D. novamexicana , which differ in pigmentation in part because of evolution at ebony and tan and occupy environments that differ in many variables including solar radiation. We hypothesized that lighter pigmentation would be correlated with a greater preference for environmental light and tested this hypothesis using a habitat choice experiment. In a first set of experiments, using males of D. novamexicana line N14 and D. americana line A00, the light‐bodied D. novamexicana was found slightly but significantly more often than D. americana in the light habitat. A second experiment, which included additional lines and females as well as males, failed to find any significant difference between D. novamexicana ‐N14 and D. americana ‐A00. Additionally, the other dark line of D. americana (A04) was found in the light habitat more often than the light‐bodied D. novamexicana ‐N14, in contrast to our predictions. However, ...