Genomic changes associated with adaptation to arid environments in cactophilic Drosophila species
Rahul V Rane, Stephen L Pearce, Fang Li, Chris Coppin, Michele Schiffer, Jennifer Shirriffs, Carla M Sgro, Philippa C Griffin, Goujie Zhang, Siu F Lee, Ary A Hoffmann, John G Oakeshott
BMC GENOMICS | BMC | Published : 2019
BACKGROUND: Insights into the genetic capacities of species to adapt to future climate change can be gained by using comparative genomic and transcriptomic data to reconstruct the genetic changes associated with such adaptations in the past. Here we investigate the genetic changes associated with adaptation to arid environments, specifically climatic extremes and new cactus hosts, through such an analysis of five repleta group Drosophila species. RESULTS: We find disproportionately high rates of gene gains in internal branches in the species' phylogeny where cactus use and subsequently cactus specialisation and high heat and desiccation tolerance evolved. The terminal branch leading to the m..View full abstract
This work was supported in part by Australia's Science and Industry Endowment Fund and the Australian Research Council (under their Laureate Fellowship Scheme). The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript.