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Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
Varietal improvement and conservation   macadamia rootstock selection - jodi neil
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Varietal improvement and conservation macadamia rootstock selection - jodi neil

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  • 1. Performance of macadamia rootstocksJodi Neal, Alison Kelly, Craig Hardner, Bruce Topp DAFF, QAAFI Working together with the Queensland Government Department of Agriculture, Fisheries and Forestry
  • 2. Background • H2 and Beaumont are currently the most common rootstock cultivars globally, based on growth rate and ease of propagation and grafting. • Rootstocks can have a significant impact on growth and productivity in other tree crops. • Little is known about rootstock effects in macadamia. Department of Agriculture, Fisheries and Forestry
  • 3. Project Description• Our project aims to : – Identify elite rootstocks for industry – Quantify the importance of rootstock effects for production – Quantify the importance of rootstock-scion interactions – Quantify the differences between own rooted, grafted seedling or clonal seedling rootstock – Develop early screening methods for elite rootstock• Project initiated by CSIRO in 1998 and transferred to DAFF/QAAFI in 2009. Department of Agriculture, Fisheries and Forestry
  • 4. Project Description• 4 rootstock trials planted in 2002, containing 2,362 trees• 15 cultivars propagated as both rootstocks and scions – A16, A268, A38, Beaumont, H2, NG8, Renown, 246, 344, 741, 781, 814, 816, 842, 849• Rootstock types: – Clonal – Seedling – Own-rooted cuttings Department of Agriculture, Fisheries and Forestry
  • 5. Preliminary ResultsCumulative Yield to Age 8• Existing rootstock cultivars Beaumont and H2 among top yielding rootstock cultivars. – High seedling/cutting vigour related to high future yield?• Rootstock cultivar accounted for approximately 1/3 of the variation in yield, scion cultivar for 2/3.• Rootstock type (cutting, seedling, own roots) did not significantly affect yield. Department of Agriculture, Fisheries and Forestry
  • 6. Preliminary Results 2009 - Age 7 years 6 Rootstock type cutting own roots 5 seedling Height at Age 7 4 • 814 and 816 cuttings produce smaller trees.Height (m) 3 • Location and rootstock 2 type have a large effect. 1 0 2 4 8 16 38 246 268 344 695 741 781 814 816 842 849 Rootstock Department of Agriculture, Fisheries and Forestry
  • 7. Preliminary Results Other traits being analysed: • Kernel recovery • Canopy width • Canopy efficiency (yield per unit canopy area) • Phytophthora resistance Department of Agriculture, Fisheries and Forestry
  • 8. Communication • Final results will be available in 2013. • These will be communicated to growers via field days, grower publications (AMS, ANG journals, MacSmart) and industry conferences. Department of Agriculture, Fisheries and Forestry
  • 9. Summary• Existing rootstock cultivars Beaumont and H2 produce high yields.• Scion cultivar accounts for most of the variation in yield.• 814 and 816 as clonal rootstocks produce smaller trees.• Once all traits are analysed, rootstock recommendations for various purposes can be made. Department of Agriculture, Fisheries and Forestry
  • 10. AcknowledgementsCameron McConchie, Dougal Russell, Rod Daley, Steve Boyton, John Wilkie, Darren Morrow, Neil Wiltshire, and our collaborating growers. For more information contact jodi.neal@daff.qld.gov.au Department of Agriculture, Fisheries and Forestry

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