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Abstract Detail


Genetics Section

Dlugosch, Katrina [1], Parker, Ingrid M. [1].

Inbreeding depression, outbreeding depression, and evolution in founding populations of an invasive plant.

FOR species with mixed mating systems, population founding events are likely to bring problems with inbreeding depression. However, many invasive species seem to defy this prediction. We are investigating inbreeding depression and mating system evolution within and among populations of the shrub Hypericum canariense (Canary Island St. Johnís wort). Native to the Canary Islands, this large perennial has escaped ornamental plantings in California and Hawaii to become an aggressive invader. Molecular analyses indicate that these introductions have included significant genetic bottlenecks, making both individual and population-level inbreeding likely. We are using controlled pollinations within common gardens of native and invading genotypes to investigate the fitness consequences of inbreeding and outcrossing for this new invader.


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1 - University of California, Department of Ecology and Evolutionary Biology, Earth & Marine Sciences Bldg., Santa Cruz, California, 95064, USA

Keywords:
invasive species
rapid evolution
founder effect
breeding system
inbreeding.

Presentation Type: Oral Paper:Papers for Sections
Session: 34-8
Location: 350/Holt
Date: Tuesday, August 1st, 2006
Time: 10:15 AM
Abstract ID:355


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