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41st Annual Albert L. Tester Memorial Symposium April 6-9, 2016 Campus Center Ballroom Exciting Graduate and Undergraduate Research Presentations! Wednesday, April 6th Thursday, April 7th 12:30 pm - 5:00 pm 9:00 am - 5:30 pm 2016 Invited Speaker Dr. Dolph Schluter Friday, April 8th Saturday April 9th 6 pm - 9 pm 9:00 am - 5:00 pm ”Genetic insights into speciation by natural selection” Wednesday, April 6th, 4:00 – 5:00 pm Campus Center Ballroom “The origin of species and the latitudinal biodiversity gradient” Friday, April 8th, 4:00 – 5:00 pm Biomed 103B Court More Information: http://manoa.hawaii.edu/biology/testersymposium or [email protected] 41st Annual Albert L. Tester Memorial Symposium April 6-9, 2015 Campus Center Ballroom "Genetic insights into speciation by natural selection” Wednesday, April 6th, 4:00 – 5:00 pm Campus Center Ballroom Dr. Dolph Schluter 2016 Invited Speaker ABSTRACT: Our understanding of how new species form has undergone a major shift in recent decades, with natural (and sexual) selection now thought to play a predominant role. What are the genetics of this process, and how do genes improve our understanding of underlying mechanisms? I describe ongoing work to address these questions in a complex of young fish species (threespine stickleback) inhabiting lakes of the Pacific Northwest. I show with an experiment that many genes contribute to ecological and morphological differences between the species, with their net effects on phenotype leading to the evolution of reduced hybrid feeding performance. Many of these genetic differences are older than the species, and a ready supply of standing genetic variation likely facilitated rapid speciation by natural selection in this group. 41st Annual Albert L. Tester Memorial Symposium April 6-9, 2016 Campus Center Ballroom Dr. Dolph Schluter 2016 Invited Speaker “The origin of species and the latitudinal biodiversity gradient” Friday, April 8th, 4:00 – 5:00 pm Biomed 103B ABSTRACT: The latitudinal biodiversity gradient is the most conspicuous global pattern in species richness. In a large majority of higher-level taxa, many more species are found at tropical latitudes than in the temperate zone. Most evolutionary explanations for this global pattern are based on the idea that rates of origin of new species (speciation), and rates of new species accumulation (diversification), are highest at low latitudes. However, a review of existing evidence suggests that diversification rates are similar between latitudes, and that speciation rates might be highest in the temperate zone. I attempt to reconcile these ideas and observations with our understanding of the dynamic history of the gradient.
