ibclogo XVI International Botanical Congess


Abstract Number: 3557
Session = 15.11.2


THE POLLINATION TEMPLATE FOR MATING-SYSTEM EVOLUTION


Harder, Lawrence D. Dept. of Biological Sciences, University of Calgary


Pollination creates the opportunities that post-pollination processes abrade to establish the eventual mating pattern within a population. As a result, mating-system evolution must occur within the template of existing and potential patterns of pollen dispersal. The scope for pollination changes that benefit mating success depends on the association between cross- and self-pollination and the causes of pollen loss. Theoretical analysis of pollen fates illustrates that pollen export can vary negatively, neutrally or positively with self-pollination, depending on the causes of variation in the pollination environment. I use this context to interpret examples of paradoxical mating- system variation, including the mating consequences of contrasting experimental arrangements of female, male and cosexual flowers in vertical inflorescences.


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