Infection of heartwood by decay fungi (heartrot) is a concern for growers of Acacia mangium for solid-wood products as the incidence can be high in some regions of Indonesia. Variation of heartrot incidence for different provenances of A. mangium was determined using two field trials in Sumatra, Indonesia. In a Riau Province trial of 21 provenances, the effect of provenance was statistically significant for natural heartrot incidence, which ranged from 1.6% to 27.2%. In a smaller trial using artificial inoculation in South Sumatra, heartwood infection incidence ranged from 39.4% to 70.8% across six provenances and both wound type and provenance were statistically significant factors. There was also significant variation in sapwood infection length related to provenance. Wood extractives (yield, total phenols, protein-precipitable tannin and 2,3-trans-3,4′,7,8-tetrahydroxyflavanone) were quantified from a subsample of trees for each trial. However, no significant differences in extractive concentration were detectable according to provenance and evidence for a relationship between heartwood extractives and heartrot incidence was generally poor. While further studies need to be completed to establish the basis for heartrot incidence, results from these trials allow for recommendations on provenance selection to reduce heartrot incidence and provide information for further genetic selection programmes. © 2006 Blackwell Verlag.

Item Type:	Refereed Article
Research Division:	Agricultural and Veterinary Sciences
Research Group:	Forestry Sciences
Research Field:	Tree Improvement (Selection and Breeding)
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Forestry
Objective Field:	Hardwood Plantations
UTAS Author:	Barry, KM (Associate Professor Karen Barry)
UTAS Author:	Mohammed, CL (Professor Caroline Mohammed)
ID Code:	32748
Year Published:	2006
Web of Science® Times Cited:	7
Deposited By:	Agricultural Science
Deposited On:	2006-08-01
Last Modified:	2007-10-17
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