The development of new genetic markers and their application to a broad variety of species has allowed us to better evaluate the extent of gene flow and genetic structure in tropical plants. In this symposium we have asked speakers to address several questions directly or indirectly in their presentations: 1) Where does the paradigm of extensive gene flow and minimal population structure in tropical plants stand given new methods and recent studies? 2) Should we expect that tropical plants have different average levels of gene flow and population structure compared to temperate plants for example? 3) Will emerging techniques like DNA microsatellite markers change our views about gene flow and population structure? 4) How can we increase inferential power when testing hypotheses related to gene flow and subdivision? Does the future lie in statistical methods, marker improvement, development of tropical plant model systems or landscape level experiments? This is a joint symposium of the Association for Tropical Biology (ATB) and the Genetics and Tropical Biology sections of the Botanical Society of America (BSA). Symposium organizers: Matthew Hamilton, Preston Aldrich, John Kress and Christopher Dick.

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