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Quantitative trait loci for foliar terpenes in a global eucalypt species

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O'Reilly-Wapstra, JM and Freeman, JS and Davies, NW and Vaillancourt, RE and Fitzgerald, H and Potts, BM (2011) Quantitative trait loci for foliar terpenes in a global eucalypt species. Tree Genetics & Genomes, 7. pp. 485-498. ISSN 1614-2942

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Abstract

Terpenes are a diverse group of plant secondary metabolites that mediate a plethora of ecological interactions in many plant species. Despite increasing research into the genetic control of important adaptive traits in some plant species, the genetic control of terpenes in forest tree species is still relatively poorly studied. In this study, we use quantitative genetic and quantitative trait loci (QTL) analysis to investigate the genetic control of foliar terpenes in an ecologically and commercially important eucalypt species, Eucalyptus globulus. We show a moderate to high within-family broad-sense heritability and significant genetic basis to the variation in 14 of the 16 terpenes assayed. This is the first report of QTL for terpenes in this species. Eleven QTL influenced the terpenes overall. One QTL on linkage group 6 affected six of the seven different sesquiterpenes assayed (plus one monoterpene), which, in combination with highly significant correlations between these compounds, argues that their variation is influenced by a QTL with pleiotropic effect early in the biosynthetic pathway. We examine the homology of these QTL to those found in a closely related eucalypt, Eucalyptus nitens, and provide evidence that both common and unique QTL influence terpene levels

Item Type: Article
Keywords: Eucalyptus . Genetic variation . Plant secondary metabolites . QTL . Terpenoids
Journal or Publication Title: Tree Genetics & Genomes
Page Range: pp. 485-498
ISSN: 1614-2942
Identification Number - DOI: 10.1007/s11295-010-0350-6
Additional Information: The final publication is available at www.springerlink.com
Date Deposited: 19 May 2011 02:30
Last Modified: 18 Nov 2014 04:17
URI: http://eprints.utas.edu.au/id/eprint/10807
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