The moderate to high levels of nucleotide diversity and low linkage disequilibrium found in many forest tree species make them ideal candidates for association mapping. Here, we report candidate gene-based association mapping results for complex wood quality and growth traits in Eucalyptus globulus Labill. ssp. globulus, the most widely grown eucalypt in temperate regions of the world. Ninety-eight single nucleotide polymorphisms (SNPs) from 20 wood quality candidate genes were assayed in a discovery population consisting of 385 trees sourced from a provenance-progeny trial. Twenty five selected SNPs with significant associations (P < 0.05) in the discovery population were assayed for validation in 296 trees sourced from an independent second-generation breeding trial. To account for background genetic structure, mixed models were used in the association analyses. Two associations identified in the discovery population were independently supported in the validation testing. However, combining the discovery and validation results in a combined analysis, we discovered nine stable marker-trait associations for seven traits. These associations link underlying complex wood and growth phenotypes to earlier putative selection signatures opening new avenues to accelerate the dissection of these traits.

Item Type:	Refereed Article
Keywords:	Eucalyptus globulus, association mapping, wood quality, candidate genes, SNP
Research Division:	Biological Sciences
Research Group:	Genetics
Research Field:	Gene mapping
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Forestry
Objective Field:	Hardwood plantations
UTAS Author:	Ades, PK (Dr Peter Ades)
UTAS Author:	Stackpole, DJ (Mr Desmond Stackpole)
UTAS Author:	Freeman, JS (Dr Jules Freeman)
UTAS Author:	Vaillancourt, RE (Professor Rene Vaillancourt)
ID Code:	96036
Year Published:	2014
Web of Science® Times Cited:	26
Deposited By:	Plant Science
Deposited On:	2014-10-17
Last Modified:	2017-11-03
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