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Abstract Detail

Genetics Section

Jones, J. Matthew [1], Gibson, Phil [2].

Levels and structuring of microsatellite variation in the highly disjunct Alnus maritima (seaside alder).

Alnus maritima (seaside alder) is a shade intolerant, riparian shrub whose formerly broad range has been sharply reduced since the Pleistocene to become the most highly disjunct woody species in North America. It occurs in small populations along banks of streams and ponds exclusively in the Delmarva Peninsula, Georgia and Oklahoma. We used nine microsatellite loci to examine levels and structuring of genetic diversity within and among populations within regions and the extent to which this structure shapes patterns of genetic diversity. Genetic differentiation among populations within regions was significant, an indicator of possible limits on hydrochorous seed-mediated gene flow. Genetic diversity is maintained by gene flow among networks of subpopulations within regions.

Broader Impacts:

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1 - University of Oklahoma, Botany and Microbiology, 770 Van Vleet Oval, Norman, OK, 73019
2 - University of Oklahoma, Department of Botany and Microbiology, Norman, OK, 73019, USA

Alnus maritima
population genetics
Biogeographical disjunct
threatened species

Presentation Type: Oral Paper:Papers for Sections
Session: 22
Location: 553B/Convention Center
Date: Monday, August 2nd, 2010
Time: 4:30 PM
Number: 22004
Abstract ID:455

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