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The genetic relationship between Mycosphaerella Leaf Disease and growth

Matthew Hamilton
University of Tasmania

The Temma E. globulus progeny trial aged one year.  The trees are still in their juvenile phase (blue leaves).

Two Eucalyptus globulus progeny trials, established to study the genetics of Mycosphaerella (now known as Teratosphaeria) Leaf Disease, were recently assessed for growth.  In both trials, significant genetic variation in disease susceptibility of the juvenile foliage was detected (see related article in Biobuzz issue 6) and these new data will enable the exploration of the genetic relationship between disease susceptibility of juvenile foliage and long-term growth.

As part of CRC sub-project  4.2.10, progeny trials were established in north-western (two in 2005 and two in 2006 - see article in Biobuzz issue one) and north-eastern Tasmania (one in 2008 - see article in Biobuzz issue six) by Forestry Tasmania.  Genetic material for these trials was contributed by a number of CRC for Forestry partners, including Forestry Tasmania,  the University of Tasmania, the Southern Tree Breeding Association, seedEnergy Pty Ltd and  Gunns Ltd.  The recent diameter at breast height (dbh) assessment of the 2006 trials involved Forestry Tasmania (Kristen Dransfield, Travis Hancock and Haydn Ihnen) and the University of Tasmania (Paul Tilyard and Hugh Fitzgerald), and completes the assessment of all four north-western trials for growth at age five years.  Stay tuned for the results!
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The Temma E. globulus progeny trial at the time of dbh measurements - aged five years - the trees now have their mature foliage.

Biobuzz issue fourteen, May 2011