Operational gain: Measuring the capture of genetic gain

Pallett, Robert N; Sale, Giovanni

doi:10.1080/20702620.2002.10434601

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Large-scale vegetative propagation is the best way to capture and multiply the best hybrid combinations to provide planting stock of outstanding trees for clonal forestry. Successful rooting is fundamental to this process (Pallett and Sale 2002).…”

Section: Introductionmentioning

confidence: 99%

The use of mini-tunnels and the effects of seasonality in the clonal propagation ofEucalyptusin a subtropical environment

Batista¹,

Santos

Silva

et al. 2015

Australian Forestry

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2015) The use of mini-tunnels and the effects of seasonality in the clonal propagation of Eucalyptus in a subtropical environment, Australian Forestry, 78:2, 65-72, SummaryEnvironmental seasonality plays a key role in the physiological processes of root formation in vegetative reproduction for commercial cloning. The authors hypothesised that (1) subtropical climatic seasonality causes higher rates of Eucalyptus minicutting production and rooting during warmer months and (2) the use of mini-tunnels to cover the stumps (stools) providing cuttings would enhance these processes year round. This study evaluated the effects of seasonality and the use of mini-tunnels using eight clones of Eucalyptus spp. under subtropical environmental conditions over the course of a year. The production systems studied were (1) mini-stumps planted in a clonal hedge (control) under a retractable roof shelter and (2) mini-stumps planted inside mini-tunnels under the same shelter. Five parameters were evaluated: (1) the temperature in the two environments; (2) the production of mini-cuttings by the stumps; (3) foliar area of the cuttings at harvest; (4) the survival of cuttings after 30 days in the greenhouse with micro-sprinklers and (5) rooting of cuttings at 45 days from setting. The use of minitunnels increased air temperature, increased mini-cutting production by 53% and promoted a reduction in foliar area of the cuttings at harvest. Rooting was found to be greater in warmer months (summer and spring) with an overall mean rooting rate of 80% versus 68% during the colder months (autumn and winter). The hypothesis that mini-tunnels enhance rooting of the cuttings produced in them was only partially confirmed, as this technique improved rooting (from 76% to 85% for the control versus the mini-tunnel conditions, respectively) only during the warmer months.

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Section: Introductionmentioning

confidence: 99%

The use of mini-tunnels and the effects of seasonality in the clonal propagation ofEucalyptusin a subtropical environment

Batista¹,

Santos

Silva

et al. 2015

Australian Forestry

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“…Full stocking is an important requirement in maximising yield per hectare of pulpwood plantations (Morris, 1995(Morris, , 1997Pallett and Sale, 2002). Operational survival assessments obtained three months after planting, however, indicate a decline in survival since 1999 in Pinus patula compartments in Mpumalanga.…”

Section: Introductionmentioning

confidence: 99%

Post establishment survival ofPinus patulain Mpumalanga, one year after planting

Crous¹

2005

The Southern African Forestry Journal

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SYNOPSISRecent evidence indicated that the pathogen Fusarium circinatum might be contributing significantly to post-planting mortality. Consequently, sixteen experimental sample plots, widely distributed over many localities in Mpumalanga, were established over two growing seasons to quantify the extent of pest and pathogen related in-field mortality. Survival in all treatments was extremely low. There was large variation in response to treatments and survival in the different trials. A single application of fungicide at planting improved survival by 13% on average, while a single application of fungicide and insecticide at planting improved survival by 29% on average. Most of the mortality occurred between 30 and 140 days after planting. Visual inspection of the dead plants indicated that White grubs and Hylastes angustatus caused most of the insect-related mortality. Pathogen isolation from a sub-sample of dying plants indicated that 49% of dying plants were pathogen-free, while F. circinatum was the prevailing fungus, isolated from 42% of the dying plants. It is estimated (95% confidence level) that F. circinatum was responsible for an 18.5% to 31.5% decline in survival in the monitored compartments,

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“…In many instances the potential gains associated with these individual improvements are not fully realised at an operational level. Most often these individual components are poorly integrated at an operational level and subsequently yield improvements can be less than anticipated (Davidson 1996, Pallett andSale 2002). Using data measured at approximately mid-rotation we tested the hypothesis that increases in productivity are obtained through a combination of the deployment of superior genetic stock, matching species to sites, intensive silvicultural practices and capturing the site potential.…”

Section: Eucalyptus Grandis •mentioning

confidence: 99%

The influence of tree improvement and cultural practices on the productivity ofEucalyptusplantations in temperate South Africa

Boreham¹,

Pallett²

2009

Southern Forests: a Journal of Forest Science

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Operational gain: Measuring the capture of genetic gain

Cited by 6 publications

References 7 publications

The use of mini-tunnels and the effects of seasonality in the clonal propagation ofEucalyptusin a subtropical environment

The use of mini-tunnels and the effects of seasonality in the clonal propagation ofEucalyptusin a subtropical environment

Post establishment survival ofPinus patulain Mpumalanga, one year after planting

The influence of tree improvement and cultural practices on the productivity ofEucalyptusplantations in temperate South Africa

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