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Abstract Detail


Population Genetics

Fotinos , Tonya  [1], Namoff, Sandra [2], Lewis, Carl [3], Griffith, M. Patrick [4], Francisco-Ortega, Javier [5], Maschinski, Joyce [6], Von Wettberg , Eric J Bishop [7].

Conservation genetics of the endangered Sargent's Cherry Palm, Pseudophoenix sargentii.

Pseudophoenix sargentii, once a critically endangered palm inhabiting coastal areas of Florida and the Caribbean, has shown a marked increase since reintroductions have augmented the wild populations in the Florida Keys. The habitat of the Sargent's cherry palm has been degraded by agricultural encroachment, grazing, over-harvesting and hurricane effects. To assess the genetic contribution of these reintroductions and to understand the current genetic structure of the species, ten microsatellites were analyzed from 124 individuals. The individuals sampled came from wild populations on Elliott Key, Long Key, and the Bahamas, as well as the Fairchild ex situ collection. The individuals on Elliott Key, where reintroductions had occurred, had age classes and wild vs.reintroduced individuals analyzed separately. Several populations displayed evidence of genetic drift, inbreeding and decreased gene flow with all populations displaying significant deviations from Hardy-Weinberg equilibrium. All populations displayed positive Fis values except the ex situ collection and the reintroduced individuals on Elliott Key. All pairwise Fst values were significant except comparisons between certain age classes on Elliott Key. AMOVA analysis partitioned 82.3% of the genetic variation within populations. Principal coordinate analysis based on genetic distance and Bayesian clustering analysis supported three distinct populations. The reintroductions on Elliott Key have contributed to an increase in the overall genetic diversity of the focal stand by increasing heterozygosity and lowering the inbreeding coefficient.

Broader Impacts:


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1 - Florida International University, Biology, 11000 SW 8th St, Miami , FL, 33199, USA
2 - Rancho Santa Ana Botanic Garden, Research, 1500 North College Avenue, Claremont, CA, 91711, USA
3 - Fairchild Tropical Botanic Garden, 10901 Old Cutler Road, Miami, FL, 33155, USA
4 - Montgomery Botanical Center, 11901 Old Cutler Road, Miami, FL, 33156, USA
5 - Fairchild Tropical Botanic Garden, 11935 Old Cutler Road , Coral Gables, Miami, FL, 33156, USA
6 - Fairchild Tropical Botanic Garden, CTPC, 11935 Old Cutler Road., Miami, FL, 33156, USA
7 - Fairchild Tropical Botanic Garden, 11935 Old Cutler Road, Coral Gables, FL, 33156, USA

Keywords:
none specified

Presentation Type: Poster:Posters for Topics
Session: P
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM
Number: PPG004
Abstract ID:477


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