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The work created a low-growth-strain second-generation breeding population for E. bosistoana and E. argophloia, then extended screening to additional durable species. Breeding trials (over 19,000 trees) used a cutting-based “splitting-test” to assess growth-strain, followed by clonal rescue and propagation from field coppice shoots. Results show growth-strain under genetic control and correlated with stiffness, enabling improved planting stock and new breeding trial establishment.",{"@graph":63,"@context":111},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/minimising-growth-strain-in-eucalypts-project-completion/242375/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/minimising-growth-strain-in-eucalypts-project-completion/242375.png","ImageObject",442,249,{"name":88,"@type":89},"นรินทร์","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-17","2026-09-12",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",8,{"@type":103,"mainEntity":104},"FAQPage",[105],{"name":106,"@type":107,"acceptedAnswer":108},"What impact did the project have on the industry and community?","Question",{"text":109,"@type":110},"It provided the basis for the first improved planting stock available from 2021, enabled establishment of second-generation durable eucalypt breeding trials, and generated essential data for future selections and quantifying genetic gains.","Answer","https://schema.org",{"og:url":78,"og:type":113,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":115,"canonical":78},"index,follow",{"doc_id":117,"site_id":56},242375,1791718149,{"code":4,"msg":5,"data":120},{"doc_id":117,"user_id":121,"nickname":88,"user_avatar":122,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":123,"file_id":124,"file_url":125,"file_type":126,"file_size":127,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":128,"language":129,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":130,"faqs":131,"seo_title":132,"seo_description":61,"update_tm":133,"read_time":73},2336475104957,"https://ap-avatar.wpscdn.com/avatar/22000c4c6bd8a5076e1?x-image-process=image/resize,m_fixed,w_180,h_180&k=1787554080175789136","Project Completion Template  \nProject Title: Minimising growthstrain in eucalypts to transform processing  \nProject Number: 407602  \nDate of Report: June 2019  \nThe information from Sections 2 – 5 and Section 11 will be published on the Ministry for Primary Industries (MPI) website unless you advise us otherwise.  \n1. Milestone Summary Table  \nMilestone Number  \nM-3377  \nMilestone   \n[As per SFF contract schedule]   \nPruned 1st trial at Woodville  \nCompletion Date  \nOriginal Actual  \nPercent Complete  \n30/01/2016 25/01/2016 100  \nM-3457  \nM-3458  \nM-3456  \nM-3459  \nM-3460  \nM-3461  \nM-3462  \nM-3489  \nM-3703  \nM-3704  \nEstablish 2nd trial at Woodville Establish 3rd trial at Harewood for G x E analysis with Woodville data  \nDemonstration workshops on early selection  \nPeeling trial at NPI (Richmond) Pruned 2nd trial at Woodville Harvesting of 1st trial at Woodville Measure and analyse 1st trial at Canterbury  \n1st Propagation of improved E. bosistoana and E. argophloia at Amberley  \nWorkshop & advisory committee meeting  \nHarvesting of 2nd trial at  \n30/04/2016  \n30/04/2016  \n24/06/2016  \n30/06/2016  \n30/01/2017  \n30/04/2017  \n30/06/2017  \n30/06/2017  \n30/06/2017  \n30/04/2018  \n19/02/2016 30/03/2016  \n23/06/2016  \n30/06/2016 9/01/2017 11/01/2017  \n1/05/2017  \n22/06/2017  \n22/06/2017  \n10/04/2018  \n100  \n100  \n100  \n100  \n100  \n100  \n100  \n100  \n100  \n100  \nM-3707  \nM-3708  \nM-3706  \nM-3705  \n407602-M16  \n407602-M17  \n407602-M18  \nWoodville  \n2nd Propagation E. bosistoana and E. argophloia at Amberley Final workshop  \nMeasure 2nd trial at Canterbury Harvesting and analysis of G x E trial (Harewood and Canterbury)  \nTrial maintenance  \nTrial assessment  \nPropagation of selected individuals  \n30/06/2018  \n30/06/2018  \n30/06/2018  \n30/06/2018  \n30/09/2018  \n31/03/2019  \n30/06/2019  \n3/06/2018  \n20/06/2018 30/05/2018  \n29/06/2018  \n29/08/2018  \n13/03/2019  \n15/05/2019  \n100  \n100  \n100  \n100  \n100  \n100  \n100  \n2. Project Objectives  \n(Why did you do this project? What were your key objectives at the start of the  \nproject? Outline if any of these objectives changed during the course of the project. )  \nThe main objective was to create a new 2 nd generation breeding population of E. bosistoana and E. argophloia with low growth-strain.  \nGrowth-strain is a main wood feature, restricting plantation grown eucalypts to lower value products like pulp and paper, as they cause splitting and deformation in higher value solid wood products.  \nThe success of the work led to a one-year extension to screen two additional durable eucalypt species, namely E. quadrangulata and E. tricarpa.  \n3. Approach  \n(What did you do – how did you go about it?)  \nFirst, breeding trials of the four species totalling more than 19,000 trees were established and then destructively measured for growth-strain at age ~2 years old. This was only possible , at this internationally unique scale , by employing a newly developed technique called the ‘splitting-test’. Essentially a ~500 mm long pruned stem section is cut along the pith and growth-strain can quickly be assessed by measuring the deflection of the half rounds and sample geometry.  \nSecondly, the superior (i.e. low growth-strain) genotypes were rescued by clonal propagation from cuttings , which were sourced from coppice shoots growing from the stumps left in the field. Clonal propagation had never been done before for these species. More than 25,000 cuttings were set resulting in more than 10,000 potted plants.  \n4. What were the main findings from this project?  \nGrowth-strain in the tested eucalypts was under genetic control (heritability of ~0 .25) and independent of diameter (growth) but positively correlated to stiffness. Therefore, it seems possible to select fast-growing and low-growth-strain genotypes. However, these will have slightly reduced stiffness, what is not a major concern given the fact that the young trees were with ~11 GPa three times stiffer than radiata pine at the same age.  \nA propagat","cbCaioGlSjWc6DVI","https://ap.wps.com/l/cbCaioGlSjWc6DVI","pdf",512853,6,"English","# Milestone summary table\n## Project objectives\n## Approach\n## Main findings\n## Project impact\n## If repeating the project","[{\"question\":\"What impact did the project have on the industry and community?\",\"answer\":\"It provided the basis for the first improved planting stock available from 2021, enabled establishment of second-generation durable eucalypt breeding trials, and generated essential data for future selections and quantifying genetic gains.\"}]","Minimising growth strain in eucalypts - Project completion | PDF",1789189803]