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University of Tasmania School of Plant Science (Project Leader Prof Rod Griffin)

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).

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University of Tasmania School of Plant Science (Project Leader Prof Rod Griffin)

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  1. 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)

  2. Context • >600,000 hectares acacia in Vietnam • Acacia export woodchips in 2011 = $600M Project objectives • 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 • Refine and demonstrate seed-based deployment strategies for Acacia mangium • Continue the development of new polyploid acacia varieties with potential for improved wood properties and reproductive sterility

  3. Year Objective 1: breeding strategy 1995 2006 2012 Aa Am Acacia auriculiformis breeding Acacia mangium breeding mangium tetraploids established 2003 F1 Aa Am Test andmass-propagatebest hybrid clones auriculiformis tetraploids established 2012 F1 Am-4X seed 300 new diploid hybrid clones from project under test 2012 • 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

  4. Objective 2: clonal family forestry Multiplying limited seed of superior trees from breeding program by hedging seedlings and rooting stem cuttings 3 years of trials at Ba Vi nursery approaching completion Rooted cuttings for field trial comparing cuttings and seedlings Clonal hedges

  5. auriculiformis diploid mangium tetraploid mangium diploid Objective 3: Polyploid breeding at Bau Bang, southern Vietnam Grafted clone bank for easy controlled pollination Original clonal orchard has alternate rows of different species and ploidy levels to promote inter-ploidy pollination Superior (selfed) tetraploid families from open-pollination A few triploids produced, under test!

  6. 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

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