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Abstract Detail


Pollination Biology

Mullarkey, Alicia [1], Anderson, Roger [2].

Effect of Mating System on Progeny Quality in the Invasive Biennial Alliaria petiolata (Brassicaceae).

The mating system of invasive plants can play an important role in determining the success of these species in invading new habitats and rapidly expanding their range. Self-fertilization provides reproductive assurance in the absence of conspecifics and/or pollinators, but inbreeding can result in inbreeding depression or the lowered fitness of inbred individuals as compared to their non-inbred counterparts. In this study, we examined the relative quality of progeny produced by self- and cross-fertilization in the highly invasive biennial, Alliaria petiolata (garlic mustard). A controlled pollination experiment was applied to plants from Central Illinois populations of Alliaria petiolata to produce self- and cross-fertilized seeds. Cross-fertilization treatments included two between population outcrosses and one within population outcross. Maternal lineages had differential responses to cross treatments indicating that there may be differential genetic load among maternal plants. Overall, individual seed mass was greater for seeds produced via between-population cross-fertilization than seeds produced via within population cross-fertilization or self-fertilization (P < 0.0001) and seed mass did not significantly differ between seeds produced via within population cross-fertilization versus self-fertilization (P = 0.622). Results show that some maternal lineages may have less purging history and thus higher genetic load, resulting in inbreeding depression.


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1 - Illinois State University, Department of Biological Sciences, Campus Box 4120, Normal, IL, 61790-4120, USA
2 - Illinois State University, Department of Biological Sciences, Campus Box 4120, Normal, Illinois, 61790-4120, USA

Keywords:
inbreeding depression
mating system
autogamy
biparental inbreeding.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P75008
Abstract ID:2235


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