| Abstract Detail
Population Genetics Proell, Julie [1], Case, Andrea L [2]. Sex ratio and population size effects from inbreeding in Great Blue Lobelia(Lobelia siphilitica; Lobeliaceae). Populations of Great Blue Lobelia (Lobelia siphilitica; Lobeliaceae) contain female and hermaphroditic individuals, and show substantial variation in population size and sex ratio across the species range. Smaller populations (<100 individuals) vary from 0 to 100% female, while large populations typically have less than 10% females. We are investigating the relationship between population size and sex ratio to understand why small populations have more females. We are specifically interested in testing whether variable levels of inbreeding in natural populations is contributing to the observed relationship between population size and sex ratio. Offspring sex ratios from self- and outcross pollinations indicate that selfing results in fewer female offspring compared to biparental inbreeding or outcrossing. This suggests that if inbreeding is contributing to population sex ratio variation, it likely reduces the frequency of female plants. In this study, we estimated effective levels of inbreeding in natural populations using microsatellite markers do document allelic diversity and estimate effective levels of inbreeding in both large and small populations. We assess the potential for inbreeding to contribute to population sex ratio variation in L. siphilitica.
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1 - Kent State University, Department of Biological Science, Cunningham Hall, Kent, OH, 44242, USA
2 - Kent State University, Biological Sciences, Box 5190, 256 Cunningham Hall, Kent, OH, 44242-0001, USA
Keywords:
inbreeding
sex ratio
microsatellites
population size
allelic variation.
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: P76005
Abstract ID:2044 |
