Results 141 to 150 of about 112,877 (169)

Three-year growth and stability of Honduran provenances and families of Pinus tecunumanii

Forest Ecology and Management, 1994
Abstract Two orthogonal sets of five trials of P. tecunumanii were established by the CAMCORE Cooperative at several locations in Brazil, Guatemala, South Africa and Venezuela. Sets A and B included 46 and 35 half-sib families, respectively, from the provenances of Jocon, San Francisco, San Esteban and Villa Santa, Honduras.
W.S. Dvorak, K.D. Ross
openaire   +1 more source

The genetic control of early growth properties in Pinus patula × Pinus tecunumanii hybrid families

Southern Forests: a Journal of Forest Science
The objective of this study was to determine the genetic control of growth properties in Pinus patula × Pinus tecunumanii hybrid families across seven sites planted in the summer rainfall region of southern Africa. Genetic material included in the analyses consisted of 61 families of P. patula × P. tecunumanii low elevation and 43 P.
JP de Villiers, A Nel, B du Toit
openaire   +2 more sources

Variation in pitch canker resistance among provenances of Pinus patula and Pinus tecunumanii from Mexico and Central America

New Forests, 2006
Pinus patula and high-elevation (HE) sources of P. tecunumanii exhibit intermediate levels of resistance to pitch canker (Fusarium circinatum), compared to extremely resistant species such as P. oocarpa, and extremely susceptible species such as P. radiata. Seedlings from 20 P. patula provenances and 15 HE P.
G. R. Hodge, W. S. Dvorak
openaire   +1 more source

Initial growth results comparing first generation F1 and advanced-generation F2 Pinus patula × Pinus tecunumanii interspecific hybrid families

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
openaire   +2 more sources

The Impact of Climate on the Dominant Height and Climate Thresholds for P. Elliottii, P. Taeda, P. Patula, and P. Patula x P. Tecunumanii Plantation Forests [PDF]

Canadian Journal of Forest Research
DATA AVAILABILITY : The data used in the manuscript is readily available upon re- quest from the corresponding author.Plantation forests were introduced into South Africa to satisfy the regional demand for wood-based products, which are largely found ...
Shawn D. Mansfield
exaly   +2 more sources

Results of provenance and family within provenance trials of Pinus tecunumanii in Colombia, South America

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
openaire   +1 more source

Bleached kraft pulp of Pinus tecunumanii

2005
We 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, Melo, Roberto, Colodette, Jorge Luiz   +2 more
openaire   +1 more source

Sawn-timber and kraft pulp properties of Pinus elliottii × Pinus caribaea var. hondurensis and Pinus patula × Pinus tecunumanii hybrids and their parental species

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, Malan, Francois S., Braunstein, Ron, Wessels, C. Brand, Kanzler, Arnulf   +4 more
openaire   +2 more sources

Provenance and family-within-provenance variation in Pinus patula, Pinus patula subspecies tecunumanii and Pinus oocarpa planted at Turbo, Kenya

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
openaire   +1 more source

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

New Forests, 2014
During the last 20 years a program to develop and commercialize the Pinus patula × Pinus tecunumanii hybrid, as a replacement for P. patula, has been successfully implemented. The first crosses were initiated during the early 1990s and lead to establishment of field trials across a wide variety of sites.
A. Kanzler, A. Nel, C. Ford
openaire   +1 more source