Inoculations of twoAcaciapopulations were used to estimate the level of genetic control for tolerance toCeratocystiscanker and wilt disease following inoculation with the causal pathogen,Ceratocystis manginecans. The first screening utilised a range of clones commonly established in Vietnam along with new candidate clones and provided evidence that variation in wilt symptoms is under a moderate level of genetic control in current deployment populations. Subsequent assessments of tolerance in a pedigreedAcacia auriculiformisprogeny trial indicated that internal lesion length assessments were less influenced by seedling height and produced higher heritability estimates than external lesion length assessments. Heritability estimates for damage to detached phyllodes following inoculation increased from 2 to 4 weeks, at which point many leaves were entirely damaged. Assessments of phyllode damage were more heritable than assessments of stem damage, and positive genetic correlations between stems and phyllode damage indicate that families will rank similarly for both traits. If validation trials confirm the results of this study in larger trees, screening as described herein may be used to develop acacia breeds with greater disease tolerance.

Item Type:	Refereed Article
Keywords:	Acacia auriculiformis; Ceratocystis manginecans; Tolerance; Heritability
Research Division:	Agricultural, Veterinary and Food Sciences
Research Group:	Forestry sciences
Research Field:	Forest health and pathology
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Forestry
Objective Field:	Hardwood plantations
UTAS Author:	Glen, M (Dr Morag Glen)
UTAS Author:	Mohammed, CL (Professor Caroline Mohammed)
ID Code:	152515
Year Published:	2020
Web of Science® Times Cited:	2
Deposited By:	TIA - Research Institute
Deposited On:	2022-08-19
Last Modified:	2022-11-21
Downloads:	0