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Genetic variation in the susceptibility of Eucalyptus globulus to drought damage
Citation
Dutkowski, GW and Potts, BM, Genetic variation in the susceptibility of Eucalyptus globulus to drought damage, Tree Genetics & Genomes, 8, (4) pp. 757-773. ISSN 1614-2942 (2012) [Refereed Article]
Copyright Statement
Copyright 2012 Springer-Verlag
DOI: doi:10.1007/s11295-011-0461-8
Abstract
Genetic variation in drought damage in
Eucalyptus globulus was studied in a sublined trial series
across four neighbouring sites in Western Australia linked
by ten common families. The trials included approximately
400 open-pollinated families, encompassing 51 native stand
collection localities and 19 subraces from throughout the
geographic range of the species. Data were analysed using
mixed models, with spatial analysis used to better identify
genetic effects. Significant subrace differences in drought
damage were detected, with both broad-scale, regional and
localised clines evident. The quantitative genetic differentiation
between subraces as measured by QST (0.39±0.091)
was significantly greater than the FST for neutral marker
expectations and consistent with diversifying selection
shaping the patterns of subrace divergence in drought susceptibility.
This conclusion is supported by the significant
association of subrace drought susceptibility with bioclimatic
parameters, particularly those associated with temperature
seasonality. Less drought damage was observed in subraces
originating from areas with more temperature seasonality,
but also less radiation and rainfall seasonality, less winter
rainfall, higher radiation and higher temperatures in the
warmest month. Significant additive genetic variation in
drought damage was detected within subraces, with
narrow-sense heritabilities ranging from 0.14 to 0.20. We
argue that spatial genetic variation in drought susceptibility
of E. globulus has been shaped by natural selection acting at
multiple scales and discuss opportunities for exploiting this
genetic variation in breeding and deployment programs.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | drought Eucalyptus globulus eucalypt genetics adaptation |
Research Division: | Biological Sciences |
Research Group: | Genetics |
Research Field: | Genetics not elsewhere classified |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Forestry |
Objective Field: | Hardwood plantations |
UTAS Author: | Dutkowski, GW (Mr Greg Dutkowski) |
UTAS Author: | Potts, BM (Professor Brad Potts) |
ID Code: | 82213 |
Year Published: | 2012 |
Funding Support: | Australian Research Council (LP0884001) |
Web of Science® Times Cited: | 51 |
Deposited By: | Plant Science |
Deposited On: | 2013-01-21 |
Last Modified: | 2015-09-01 |
Downloads: | 0 |
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