Search Results - "Dvorak, W.S"

World view of Gmelina arborea: opportunities and challenges by Dvorak, W.S

“…Gmelina arborea Roxb. (gmelina) occurs naturally in 11 countries in tropical and subtropical regions of Asia. Approximately 700,000ha of gmelina have now been…”
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Assessing the potential of Pinus herrerae as a plantation species for the subtropics by Dvorak, W.S., Kietzka, Eric, Hodge, G.R., Nel, A., dos Santos, G.A., Gantz, C.

“…Pinus herrerae Martínez is a little known hard pine that occurs in the western mountain ranges of Mexico between 16° and 28°N latitude and 1800 m and 2400 m…”
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CAMCORE international provenance/progeny trials of Gmelina arborea: genetic parameters and potential gain by Hodge, G.R, Dvorak, W.S

“…This paper reports early results from the provenance/progeny trials in Colombia, Costa Rica, Guatemala, Indonesia, Mexico and Venezuela. These were the first…”
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Flow Cytometric Analysis of DNA Content for Tropical and Temperate New World Pines by Hall, S.E., Dvorak, W.S., Johnston, J.S., Price, H.J., Williams, C.G.

“…Temperate pine species have unusually large, complex genomes which make genomic analysis problematic; it has been suggested that tropical pines might have…”
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Three-year survival and growth of provenances of Pinus greggii in the tropics and subtropics by Dvorak, W.S., Kietzka, J.E., Donahue, J.K.

“…Eleven provenance/progeny tests of Pinus greggii Engelm. were assessed for survival and height at 3 years of age in Brazil, Colombia and South Africa. Trees of…”
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Growth and modulus of elasticity of pine species and hybrids three years after planting in South Africa by Nilsson, O, Hodge, G R, Frampton, L J, Dvorak, W S, Bergh, J

“…Growth data and modulus of elasticity (MOE) of 11 different pine species and hybrids were examined at six sites in three regions in South Africa. Growth traits…”
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Water use in Plantations of Eucalypts and Pines: A Discussion Paper from a Tree Breeding Perspective by Dvorak, W.S.

“…Plantation forests are being established on more marginal, harsh sites to accommodate expansion of agriculture. Because of this, tree breeders and…”
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Evidence of low-levels of natural introgression between Pinus jaliscana and Pinus oocarpa in an open-pollinated progeny trial using near-infrared spectroscopy by Dvorak, W.S., Nel, A., Espinoza, J.A.

“…► Introgression between P. oocarpa and P. jaliscana occurs in natural stands. ► Putative hybrids in an open-progeny test were confirmed by botanical analysis…”
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Conservation and use of the Pinus chiapensis genetic resource in Colombia by Wright, J.A., Marin V., A.M., Dvorak, W.S.

“…The species Pinus chiapensis is under severe pressure from forest conversion to agriculture and fuelwood cutting. These trends are certain to continue and…”
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Recent developments in a tree improvement program with Pinus patula in Colombia by Wright, J.A., Osorio, L.F., Dvorak, W.S.

“…In Colombia, Pinus patula Schiede and Deppe in Schlectendal and Chamisso is the most widely planted conifer species due to its wide adaptability in terms of…”
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Genetic diversity and gene exchange in Pinus oocarpa, a Mesoamerican pine with resistance to the pitch canker fungus (Fusarium circinatum) by Dvorak, W.S, Potter, K.M, Hipkins, V.D, Hodge, G.R

“…Eleven highly polymorphic microsatellite markers were used to determine the genetic structure and levels of diversity in 51 natural populations of Pinus…”
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Growth, provenance effects and genetic variation of Bombacopsis quinata in field tests in Venezuela and Colombia by Hodge, G.R., Dvorak, W.S., Urueña, H., Rosales, L.

“…Ten provenance/progeny tests of Bombacopsis quinata were established in Venezuela and Colombia using open-pollinated (OP) seed collected from throughout its…”
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origin of Caribbean pine in the seasonal swamps of the Yucatan by Dvorak, W.S, Hamrick, J.L, Gutierrez, E.A

“…An isolated 180‐ha stand ofPinus caribaeavar.hondurensis(Caribbean pine) exists at El Pinal, Guatemala, in seasonal marshlands 18 km northeast of the old Mayan…”
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Provenance and family variation in Sterculia apetala in Colombia by Dvorak, W.S., Urueña, H., Moreno, L.A., Goforth, J.

“…Three provenances and 23 open-pollinated families of Sterculia apetala (Jacq.) Karst were established in a genetic field test in Zambrano, (Bolivar) northern…”
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Assessing evolutionary relationships of pines in the Oocarpae and Australes subsections using RAPD markers by Dvorak, W.S, Jordon, A.P, Hodge, G.P, Romero, J.L

“…RAPD marker technology was used to assess evolutionary relationships among species classified in the Oocarpae and Australes subsections. A total of 127 RAPD…”
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In vitro regeneration of plantlets from mature embryos of Pinus ayacahuite by Saborio, F, Dvorak, W.S, Donahue, J.K, Thorpe, T.A

“…A plantlet regeneration protocol was developed for Pinus ayacahuite var. ayacahuite (Ehrenb.). Embryos from mature seeds from ten provenances were cultured in…”
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Provenance and family variation of Pinus oocarpa grown in the Brazilian cerrado by Moura, V.P.G, Dvorak, W.S, Hodge, G.R

“…A Pinus oocarpa trial with six provenances and 46 open-pollinated families was planted on a deep Oxisol in 1983, at the EMBRAPA research station near…”
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Evidence for an extreme bottleneck in a rare Mexican pinyon: genetic diversity, disequilibrium, and the mating system in Pinus marimartinezii by Ledig, F.T. (Pacific Southwest Research Station, USDA FS, Placerville, CA.), Conkle, M.T, Bermejo-Velazquez, B, Equiluz-Piedra, T, Hodgskiss, P.D, Johnson, D.R, Dvorak, W.S

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Provenance and progeny results for the tropical white pine, Pinus chiapensis, at five and eight years of age by Dvorak, W.S. (North Carolina Univ., Raleigh, NC (USA). Coll. of Forest Resources, Grinnells Lab.), Donahue, J.K, Vasquez, J.A

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Genetic and site effects on stem breakage in Pinus tecunumanii by Dvorak, W.S, Lambeth, C.C, Li, B

“…Fifteen provenance/progeny tests of Pinus tecunumanii (Schw.) Eguiluz et Perry were assessed for upper-crown stem breakage at 5 to 8 years of age in Brazil,…”
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