aciar project fst 2008/007 advanced breeding and deployment methods for tropical acacias (2009-13)...
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ACIAR Project FST 2008/007 Advanced breeding and deployment
methods for tropical acacias (2009-13) Follows “Development and evaluation of sterile triploids and polyploid breeding methodologies
for commercial species of acacia in Vietnam, South Africa and Australia. (FST/2003/002)
• University of Tasmania School of Plant Science
(Project Leader Prof Rod Griffin)
• CSIRO (Dr Chris Harwood)
• Research Centre for Forest Tree Improvement, Forest Science Institute of Vietnam
(Project Leader Dr Ha Huy Thinh)
Project objectives
1. Design and implement an efficient strategy for large-scale production, testing and deployment of new acacia hybrid clones for use by tree growers throughout Vietnam
2. Refine and demonstrate seed-based deployment strategies for Acacia mangium
3. Continue the development of new polyploid acacia varieties with potential for improved wood properties and reproductive sterility
Context•>600,000 hectares acacia in Vietnam
•Acacia export woodchips in 2011 = $600M
Aa Am
F1
Aa Am
F1
Year
1995
2012
2006
Acacia auriculiformis breeding
Acacia mangium breeding
Test andmass-propagatebest hybrid clones
Objective 1: breeding strategy
Polyploid breeding options emerging, many opportunities:•AM-4x wood shown to have superior fibre length and stiffness •First triploid hybrids (Aa-2X × Am-4X) under trial – seedless?•Tetraploid hybrid clones under trial•Superior open-pollinated Am tetraploid families (selfed) under trial•Control-pollinated crossing continuing
mangium tetraploids established 2003
Am-4X seed
auriculiformis tetraploids established 2012
300 new diploid hybrid clones from project under test 2012
Objective 2: clonal family forestry
Clonal hedgesRooted cuttings for field trial comparing cuttings and seedlings
Multiplying limited seed of superior trees from breeding program by hedging seedlings and rooting stem cuttings3 years of trials at Ba Vi nursery approaching completion
Original clonal orchard has alternate rows of different species and ploidy levels to
promote inter-ploidy pollination
Objective 3: Polyploid breeding at Bau Bang, southern Vietnam
Grafted clone bank for easy controlled pollination
Superior (selfed) tetraploid families from
open-pollination
A few triploids produced, under test!
auriculiformis diploid
mangium tetraploid
mangium diploid
Impacts, John Allwright students, publications
• Seedless triploids, new diploid hybrids, and tetraploid hybrid clones and families with improved wood properties, for plantation forestry in Vietnam (600,000 ha acacias) and other tropical countries.
• ACIAR-supported review of commercialization prospects, 2013
• JAFs Mr Tran Duc Vuong: MSc UTas (2009), Ms Nghiem Quyn Chi PhD UTas (2012)
• 7 peer-reviewed journal papers from the projects already published/in press, more in preparation
• IUFRO Acacia breeding and silviculture working party initiated 2013, FSIV to host international conference 2014