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Genetic variation of in vitro rooting ability with time in Eucalyptus globulus


Ruaud, JN and Lawrence, NL and Pepper, S and Potts, BM and Borralho, NMG, Genetic variation of in vitro rooting ability with time in Eucalyptus globulus, Silvae Genetica, 48, (1) pp. 4-7. ISSN 0037-5349 (1999) [Refereed Article]


The genetic control of in vitro rooting success of Eucalyptus globulus was examined in two studies, one involving 496 ortets (seedlings) from 20 open pollinated families from a single race (Jeeralang) and another involving 155 ortets from 15 control pollinated families (half-diallel). Rooting was examined in several consecutive rooting tests, spanning a one year period, allowing the importance of genetic effects, changes over time, and the interaction between genotype and rooting tests to be determined. Significant levels of additive genetic variation for rooting success were detected. The narrow-sense heritability was h2=0.16 and 0.27, respectively with the genetic correlations across tests extremely high (0.83 and 0.81). The levels of specific combining ability and ortet (within family) by test interaction were low (1.5% and 5% of the total variation, respectively) but significant. Rooting ability dropped markedly during the initial few months but seemed to remain stable thereafter, at levels of 15 % and 40 %, respectively. Parents with an intrinsic genetic superiority for rooting can be identified on the basis of a few well replicated tests. The superiority is expected to be mostly under additive genetic control which would allow the use of bulked family deployment strategies as well as breeding for improved rooting ability.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Gene mapping
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Ruaud, JN (Dr Jean Noel Ruaud)
UTAS Author:Lawrence, NL (Ms Naomi Leigh Lawrence)
UTAS Author:Pepper, S (Mr Scott Pepper)
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Borralho, NMG (Dr Nuno Borralho)
ID Code:17564
Year Published:1999
Web of Science® Times Cited:13
Deposited By:Plant Science
Deposited On:1999-08-01
Last Modified:2009-07-31

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