Regional and population-scale influences on genetic diversity partitioning within costa rican populations of the pioneer tree Vochysia ferruginea mart.

Cavers, S., Navarro, C., Hopkins, R., Ennos, R. A. and Lowe, A. J. (2005) Regional and population-scale influences on genetic diversity partitioning within costa rican populations of the pioneer tree Vochysia ferruginea mart.. Silvae Genetica, 54 6: 258-264.


Author Cavers, S.
Navarro, C.
Hopkins, R.
Ennos, R. A.
Lowe, A. J.
Title Regional and population-scale influences on genetic diversity partitioning within costa rican populations of the pioneer tree Vochysia ferruginea mart.
Journal name Silvae Genetica   Check publisher's open access policy
ISSN 0037-5349
Publication date 2005-01-01
Sub-type Article (original research)
Volume 54
Issue 6
Start page 258
End page 264
Total pages 7
Place of publication Germany
Publisher J. D. Sauerlaender's Verlag
Language eng
Subject C1
270203 Population and Ecological Genetics
771006 Remnant vegetation and protected conservation areas
0604 Genetics
0705 Forestry Sciences
Abstract The neotropical pioneer species Vochysia ferruginea is locally important for timber and is being increasingly exploited. The sustainable utilisation of this species would benefit from an understanding of the level and partitioning of genetic diversity within remnant and secondary regrowth populations. We used data from total genome (amplified fragment length polymorphism, AFLP) and chloroplast genome markers to assay diversity levels within seven Costa Rican populations. Significant chloroplast differentiation between Atlantic and Pacific watersheds was observed, suggesting divergent historical origins for these populations. Contemporary gene flow, though extensive, is geographically constrained and a clear pattern of isolation by distance was detectable when an inter-population distance representing gene flow around the central Costa Rican mountain range was used. Overall population differentiation was low (F-ST = 0.15) and within-population diversity high, though variable (H-s=0.16-0.32), which fits with the overall pattern of population genetic structure expected for a widespread, outcrossed tropical tree. However genetic diversity was significantly lower and differentiation higher for recently colonised and disturbed populations compared to that at more established sites. Such a pattern seems indicative of a pioneer species undergoing repeated cycles of colonisation and succession.
Keyword Forestry
Genetics & Heredity
Aflp
Chloroplast Dna
Genetic Diversity
Gene Flow
Succession
Mahogany Swietenia-macrophylla
Secondary Rain-forest
Cedrela-odorata L.
Natural-populations
Mesoamerican Populations
Neotropical Tree
Hurricane-joan
History
Phylogeography
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2006 Higher Education Research Data Collection
School of Biological Sciences Publications
 
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Created: Wed, 15 Aug 2007, 17:12:54 EST