Gibson, J. Phil , Rice, Stanley A. , Stucke, Clare M. .
Levels and structuring of population genetic variation in a rare wetlands tree species Alnus maritima (seaside alder).
Seaside alder is a rare tree species that occurs in highly disjunct populations in the Delmarva Peninsula, south-central Oklahoma, and northeastern Georgia. The levels and structuring of allozyme variation was measured within and compared among populations in these three areas. Analyses indicated characteristically low levels of genetic variation for the entire species and individual populations, significant genetic differentiation among populations, and a significant heterozygote deficiency in all populations despite a predominantly outcrossed mating system. Furthermore, although mating events do produce viable seeds, there is no evidence of individuals being recruited to any of the populations through sexual reproduction. The results of these studies will be of value in developing effective conservation strategies for this potentially endangered species.
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1 - Agnes Scott College, Biological Sciences, 141 E. College Ave., Decatur, Georgia, 30030
2 - Southeastern Oklahoma State University, Biological Sciences, Box 4027, Durant, Oklahoma, 74701, USA
Presentation Type: Oral Paper
Date: Monday, August 15th, 2005
Time: 8:30 AM