Results 121 to 130 of about 420 (144)
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Southern Forests: a Journal of Forest Science, 2021
The hybrid between Pinus patula and P. tecunumanii low elevation (PPTL) and high elevation (PPTH) sources was developed in the 1990s in South Africa and commercialised during the 2000s in response to high post-establishment mortality of P. patula caused by Fusarium circinatum.
André Nel, Juan J Acosta, Gary R Hodge
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The hybrid between Pinus patula and P. tecunumanii low elevation (PPTL) and high elevation (PPTH) sources was developed in the 1990s in South Africa and commercialised during the 2000s in response to high post-establishment mortality of P. patula caused by Fusarium circinatum.
André Nel, Juan J Acosta, Gary R Hodge
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Forest Ecology and Management, 1992
Abstract A total of 13 trials comprised of 24 provenances and more than 520 families have been planted to date with CAMCORE (Central America and Mexico Coniferous Resources Cooperative) collections of Pinus tecunumanii Eguiluz and Perry in the Andes region of Colombia. Provenances and families differed significantly ( P Pinus tecunumanii produced
J.A. Wright, L.F. Osorio
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Abstract A total of 13 trials comprised of 24 provenances and more than 520 families have been planted to date with CAMCORE (Central America and Mexico Coniferous Resources Cooperative) collections of Pinus tecunumanii Eguiluz and Perry in the Andes region of Colombia. Provenances and families differed significantly ( P Pinus tecunumanii produced
J.A. Wright, L.F. Osorio
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Southern Forests: a Journal of Forest Science, 2017
A study was undertaken to evaluate the quality of the timber produced by Pinus elliottii × Pinus caribaea var. hondurensis (PECH) and the Pinus patula × Pinus tecunumanii low elevation (PPTL) and high elevation (PPTH) hybrids and their parent species for both kraft pulp and sawn-timber production. Trees were taken from unthinned tree improvement trials
Nel, André +4 more
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A study was undertaken to evaluate the quality of the timber produced by Pinus elliottii × Pinus caribaea var. hondurensis (PECH) and the Pinus patula × Pinus tecunumanii low elevation (PPTL) and high elevation (PPTH) hybrids and their parent species for both kraft pulp and sawn-timber production. Trees were taken from unthinned tree improvement trials
Nel, André +4 more
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Bleached kraft pulp of Pinus tecunumanii
2005We evaluated use of 12 year-old Pinus tecunumanii (Eguiluz & Perry) grown in Colombia for bleached kraft pulp production. Kraft pulps of kappa number 30 + 1 were produced, further oxygen delignified and bleached to 90% ISO with ECF processes. The bleached pulp produced under optimum conditions was evaluated regarding strength properties.
Torres, Leonel Fernando +2 more
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Forest Ecology and Management, 1998
Abstract Pinus patula accounts for about 26% of all forest plantations in Kenya and is used mainly for timber, pulpwood and plywood production, whereas Pinus patula subspecies tecunumanii and Pinus oocarpa have been planted on experimental scale only. The three close coned pines were studied in a field trial planted in 1985 at Turbo, Kenya as part of
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Abstract Pinus patula accounts for about 26% of all forest plantations in Kenya and is used mainly for timber, pulpwood and plywood production, whereas Pinus patula subspecies tecunumanii and Pinus oocarpa have been planted on experimental scale only. The three close coned pines were studied in a field trial planted in 1985 at Turbo, Kenya as part of
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Genetic Parameters and Provenance Productivity ofPinus oocarpaandPinus patulassp.tecunumanii
South African Forestry Journal, 1995SYNOPSIS Results are presented of a provenance-progeny test of six populations of Pinus oocarpa Schiede and two of P. patula Schiede & Deppe in Schlecht. & Cham. ssp. tecunumanii (Equiluz & Perry) Styles; each population was represented by 8 or 16 families.
B. I. Nyoka, R. D. Barnes
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New Forests, 1990
Wood specific gravity was determined for 29 half-sib families of 4-year-old Pinus tecunumanii from the Mountain Pine Ridge, Belize, planted at three locations in Brazil and Colombia. Although there was a significant (p ≤ 0.05) family by sites interaction (F × S), it was found that only 5 of the 29 families were major contributors.
R. T. Lima, J. B. Jett, W. S. Dvorak
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Wood specific gravity was determined for 29 half-sib families of 4-year-old Pinus tecunumanii from the Mountain Pine Ridge, Belize, planted at three locations in Brazil and Colombia. Although there was a significant (p ≤ 0.05) family by sites interaction (F × S), it was found that only 5 of the 29 families were major contributors.
R. T. Lima, J. B. Jett, W. S. Dvorak
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Trees, 2014
Key message We conducted molecular characterization of Nicaraguan Pinus tecunumanii populations using microsatellite markers. Populations possess considerable genetic variation but there are risks associated with inbreeding and population fragmentation.
Arlen Tijerino, Helena Korpelainen
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Key message We conducted molecular characterization of Nicaraguan Pinus tecunumanii populations using microsatellite markers. Populations possess considerable genetic variation but there are risks associated with inbreeding and population fragmentation.
Arlen Tijerino, Helena Korpelainen
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Genetic control of Fusarium circinatum tolerance in Pinus patula × P. tecunumanii hybrid families
Southern Forests: a Journal of Forest ScienceThe pine pitch canker fungus, Fusarium circinatum, has caused large-scale mortality of Pinus patula crops in South African nurseries and high in-field post-planting mortality. Tree breeders have identified selection and breeding of tolerant material as the likely long-term solution to this disease.
Lebogang Mphahlele, André Nel
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