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Chemical variation in a dominant tree species: population divergence, selection and genetic stability across environments
Citation
O'Reilly-Wapstra, JM and Miller, AM and Hamilton, MG and Williams, D and Glancy, NE and Potts, BM, Chemical variation in a dominant tree species: population divergence, selection and genetic stability across environments, PLoS ONE, 8, (3) Article e58416. ISSN 1932-6203 (2013) [Refereed Article]
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Copyright Statement
Licensed under Creative Commons Attribution 2.5 Generic (CC BY 2.5) http://creativecommons.org/licenses/by/2.5/
DOI: doi:10.1371/journal.pone.0058416
Abstract
Understanding among and within population genetic variation of ecologically important plant traits provides insight into the potential evolutionary processes affecting those traits. The strength and consistency of selection driving variability in traits would be affected by plasticity in differences among genotypes across environments (G x E). We investigated population divergence, selection and environmental plasticity of foliar plant secondary metabolites (PSMs) in a dominant tree species, Eucalyptus globulus. Using two common garden trials we examined variation in PSMs at multiple genetic scales; among 12 populations covering the full geographic range of the species and among up to 60 families within populations. Significant genetic variation in the expression of many PSMs resides both among and within populations of E. globulus with moderate (e.g., sideroxylonal A h2op = 0.24) to high (e.g., macrocarpal G h2E. globulus, and identifies the formylated phloroglucinol compounds (particularly sideroxylonal) and a dominant oil, 1,8-cineole, as candidates for traits whose genetic architecture has been shaped by divergent selection. Additionally, as the genetic differences in these PSMs that influence community phenotypes is stable across environments, the role of plant genotype in structuring communities is strengthened and these genotypic differences may be relatively stable under global environmental changes.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Eucalypt, genetic variation, plant secondary metabolites, GxE |
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Terrestrial ecology |
| Objective Division: | Plant Production and Plant Primary Products |
| Objective Group: | Forestry |
| Objective Field: | Hardwood plantations |
| UTAS Author: | O'Reilly-Wapstra, JM (Associate Professor Julianne O'Reilly-Wapstra) |
| UTAS Author: | Miller, AM (Dr Alison Miller) |
| UTAS Author: | Hamilton, MG (Dr Matthew Hamilton) |
| UTAS Author: | Glancy, NE (Miss Naomi Glancy) |
| UTAS Author: | Potts, BM (Professor Brad Potts) |
| ID Code: | 84283 |
| Year Published: | 2013 |
| Funding Support: | Australian Research Council (DP0773686) |
| Web of Science® Times Cited: | 25 |
| Deposited By: | Plant Science |
| Deposited On: | 2013-05-01 |
| Last Modified: | 2014-04-04 |
| Downloads: | 379 View Download Statistics |
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