Development and commercialisation of the Pinus patula × P. tecunumanii hybrid in response to the threat of Fusarium circinatum

Kanzler, Arnulf; Nel, André; Ford, Craig M.

doi:10.1007/s11056-014-9412-1

Cited by 24 publications

(17 citation statements)

References 23 publications

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“…Fusarium spp. are known to threaten pine plantations and natural stands throughout the world (Wingfield et al, 2008;Kanzler et al, 2014). Damping-off of young conifer seedlings by Fusarium spp.…”

Section: Introductionmentioning

confidence: 99%

Control of Fusarium spp. causing damping-off of pine seedlings by means of selected essential oils

Seseni

Régnier

Merwe

et al. 2015

Industrial Crops and Products

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Section: Introductionmentioning

confidence: 99%

Control of Fusarium spp. causing damping-off of pine seedlings by means of selected essential oils

Seseni

Régnier

Merwe

et al. 2015

Industrial Crops and Products

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“…There have been various interspecific hybridisation successes that address the following breeding objectives: Fusarium circinatum and low levels of frost tolerance (P. patula Schiede ex Schlechtendal et Chamisso var. patula x P. tecunumanii Eguiluz et Perry) (Kanzler et al 2014); Cronartium ribicola tolerance and cold hardiness (P. strobus L. x P. wallichiana Jacks) (Lu & Derbowka 2012); drought tolerance and productivity (P. elliotti Engelm. x P. taeda L.) (Dungey 2001); hardiness, rapid growth rate and timber quality (P. rigida Miller x P. taeda) (Huyn 1976, Barnes & Mullin 1978; and tree production and pulp properties (P. elliottii x P. caribaea Morelet) (Cappa et al 2013, Wright et al 1991, Van der Sijde & Roelofsen 1986).…”

Section: Introductionmentioning

confidence: 99%

Climate as possible reproductive barrier in Pinus radiata (D. Don) interspecific hybridisation

et al. 2017

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Abstract. Historically, interspecific hybridisation with Pinus radiata D. Don had limited success. The effect of environmental conditions and position of pollination bags in the tree were investigated as possible hybridisation barriers. The study was conducted in a P. radiata seed orchard in the Southern Cape (South Africa). Field data were compared to the climatic conditions at natural and commercial provenances of seven Mesoamerican Pinus species identified as possible hybrid partners. In vitro pollen studies were used to confirm whether interspecific crosses with P. radiata might be feasible within predefined climatic parameters. The temperature ranges for both top and northern side of P. radiata pine trees in the seed orchard was similar to the natural distribution of P. radiata, P. elliottii Engelm. and P. taeda L. in the USA. Results suggested that pollen of P. elliottii and P. taeda might be more suited to result in the successful pollination of P. radiata than the other Mesoamerican pine species tested in this study. Furthermore, the combination of minimum temperature and precipitation also showed a closer correlation to successful hybridisation with P. radiata for both P. elliotii and P. taeda. However, pollen tube elongation studies did not support these results, suggesting that mean temperature might not be the only determining factor of hybridisation success. Three circadian temperature models that mimic natural conditions were developed for Karatara and Sabie (Tweefontein, Witklip and Spitskop). These models will be tested in future in vitro studies to further evaluate temperature fluctuations between day and night regimes as a possible reproductive barrier limiting hybridisation success between P. radiata and other Mesoamerican pine species.

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“…Post-planting survival of P. patula in South Africa has decreased as a result of this pathogen (Hodge and Dvorak 2007;Mitchell et al 2012;Kanzler et al 2014). The poor survival rates prompted the development of new hybrid combinations to overcome the mortality caused by F. circinatum.…”

Section: Introductionmentioning

confidence: 99%

“…This puts the industry in a position to develop, test and cross and then select the best hybrid combinations. Research and development of the P. patula × P. tecunumanii hybrid has been ongoing for more than 20 years (Kanzler et al 2014). Studies conducted in Swaziland and in the KwaZulu-Natal Midlands of South Africa demonstrated that P. patula × P. tecunumanii outperforms P. patula by an average of 23% in volume at the age of five years (Kanzler et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The study also reported that 64% of the P. patula × P. tecunumanii families performed better than both P. patula and P. tecunumanii controls. Furthermore, the P. patula × P. tecunumanii hybrid was reported to be significantly more tolerant to F. circinatum than P. patula (Mitchell et al 2012;Kanzler et al 2014). Thus, due to these benefits, P. patula × P. tecunumanii is now widely planted as an alternative to P. patula in South Africa.…”

Section: Introductionmentioning

confidence: 99%

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Growth and dynamic modulus of elasticity of Pinus patula × Pinus tecunumanii hybrids in Mpumalanga, South Africa

Hongwane

Mitchell²,

Kanzler

et al. 2016

Southern Forests: a Journal of Forest Science

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Field establishment of South Africa's most important commercial pine species, Pinus patula, is severely hampered by the pitch canker fungus, Fusarium circinatum. Importantly, hybrids between P. patula and other pine species tolerant to the pitch canker fungus, such as P. tecunumanii and P. oocarpa, have been identified as an alternative planting stock. In this study, variation in tree volume and dynamic modulus of elasticity (MOE dym ) of the P. patula × P. tecunumanii (low-and high-elevation [LE and HE] ecotypes) hybrid was compared with the P. elliottii × P. caribaea hybrid, and the pure species P. tecunumanii (LE) and P. patula. The MOE dym was assessed using the Fakkop TreeSonic microsecond instrument across three sites. The results of the study showed that P. patula × P. tecunumanii LE performed significantly better than P. patula × P. tecunumanii HE for volume and MOE dym , which in turn was significantly better than P. patula. The MOE dym and tree growth decreased with an increase in elevation. There was significant taxon × site interaction for volume and MOE dym . The results of these trials suggested that P. patula × P. tecunumanii LE is a suitable alternative to P. patula in the Sabie region of Mpumalanga in South Africa on frost-free sites, in terms of the traits that were assessed.

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Development and commercialisation of the Pinus patula × P. tecunumanii hybrid in response to the threat of Fusarium circinatum

Cited by 24 publications

References 23 publications

Control of Fusarium spp. causing damping-off of pine seedlings by means of selected essential oils

Control of Fusarium spp. causing damping-off of pine seedlings by means of selected essential oils

Climate as possible reproductive barrier in Pinus radiata (D. Don) interspecific hybridisation

Growth and dynamic modulus of elasticity of Pinus patula × Pinus tecunumanii hybrids in Mpumalanga, South Africa

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