Provenance and family variation of Pinus oocarpa grown in the Brazilian cerrado

Moura, V. P. G.; Dvorak, W. S.; Hodge, Gary R.

doi:10.1016/s0378-1127(98)00265-5

Cited by 17 publications

(14 citation statements)

References 4 publications

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“…A maioria dos reflorestamentos se localizou no Cerrado por causa do preço da terra naquela época. Porém, reflorestamentos situados em Angatuba, SP, e outras regiões alcançaram rendimentos surpreendentes (MOURA et al, 1998).…”

Section: Introductionunclassified

“…hondurensis, Pinus tecunumanii, Pinus patula e outras espécies são promissores, em virtude da qualidade da madeira e da facilidade de propagação (MOURA et al, 1998).…”

Section: Introductionunclassified

“…Durante o incentivo aos programas de reflorestamento, no início dos anos da década de 1970, largas áreas de plantações de Pinus oocarpa foram estabelecidas, principalmente na região do Cerrado brasileiro, que compõe, aproximadamente, 25% do território nacional (MOURA et al, 1998).…”

Section: Introductionunclassified

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Análise da madeira de Pinus oocarpa parte I: estudo dos constituintes macromoleculares e extrativos voláteis

2005

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3RESUMO -Neste estudo foram analisados os principais componentes químicos da madeira de Pinus oocarpa, cultivado na região do cerrado. A composição química dessa madeira foi: 59,05% de a-celulose, 21,22% de hemiceluloses A e B, 25,18% de lignina, 2,78% de extrativos em diclorometano, 4,38% de extrativos em etanol:tolueno, 4,31% de extrativos em água quente e 1,26% de cinzas. O conteúdo de celulose foi relativamente elevado, indicando que essa madeira possui grande potencial para produção de pasta de celulose. Investigou-se, também, a composição dos extrativos. Os principais constituintes do extrato diclorometano dessa madeira foram os ácidos diterpênicos, além dos ácidos palmítico e oléico. No óleo essencial, extraído por aparelho de Clevenger, os principais componentes identificados foram aromadendreno, ledano, hexadecanal e ácido oléico.Palavras-chave: Pinus oocarpa, componentes macromoleculares e extrativos. CHEMICAL ANALYSIS OF Pinus oocarpa WOOD PART I -QUANTIFICATION OF MACROMOLECULAR COMPONENTS AND VOLATILE EXTRACTIVES

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Section: Introductionunclassified

“…hondurensis, Pinus tecunumanii, Pinus patula e outras espécies são promissores, em virtude da qualidade da madeira e da facilidade de propagação (MOURA et al, 1998).…”

Section: Introductionunclassified

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Análise da madeira de Pinus oocarpa parte I: estudo dos constituintes macromoleculares e extrativos voláteis

2005

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“…Studies on the genetic variability of P. oocarpa have been limited to a few inherited, quantitative traits. Considerable variation has been reported in trials with pines from different parts of Central America, in which open‐pollinated families were planted in a range of tropical and subtropical environments (Moura et al . 1998).…”

Section: Introductionmentioning

confidence: 99%

Random amplified polymorphic DNA and amplified fragment length polymorphism assessment of genetic variation in Nicaraguan populations of Pinus oocarpa

2001

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Pinus oocarpa is the most widely distributed pine species of Mexico and Central America. The natural populations of Nicaragua have been affected by extensive human activities. As a consequence, their size has been reduced, and there is a serious threat to the development of mature woodland. Knowledge of population structures and the genetic diversity of the species is required for the design of sustainable use and conservation strategies. Random amplified polymorphic DNA (RAPD) and amplified fragment length polymorphism (AFLP) markers were used to assess the genetic variation among 10 populations from three geographical regions of Nicaragua. Both markers revealed high levels of diversity in these populations. G(ST) values and analyses of molecular variance (AMOVA) found that most variation was within populations but there is still a significant differentiation between populations indicating that the populations sampled cannot be considered a single panmictic unit. The partitions created by AMOVA also showed that there was little differentiation between populations of different regions, although cluster analyses based on RAPDs and AFLPs indicated a closer relationship among most of the populations from a same geographical region. Management of P. oocarpa in Nicaragua should be aimed to maintain the high degree of genetic variation within individual populations that is still observed even in some of these highly degraded populations.

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“…Narrow-sense heritability for individual stem volume, h i 2 = 0.189, compared favorably with that of other pine species such as P. tecunumanii (0.15), P. oocarpa (0.29), P. elliottii (0.12), P. palustris (0.31) and P. caribaea (0.11) (Hodge and Dvorak 1999;Moura et al 1998;Dieters et al 1995;Adams et al 1994;Ledig and Whitmore 1981, respectively) indicating that stem volume is a trait under low to moderate genetic control in this population of red pine. All four selection methods increased E(g) for stem volume, indicating that improvements in volume for red pine are possible despite an inherently low level of natural genetic variation.…”

Section: Discussionmentioning

confidence: 78%

Comparison of selection methods for optimizing genetic gain and gene diversity in a red pine (Pinus resinosa Ait.) seedling seed orchard

2003

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Four selection methods, individual selection (IS), family selection (FS), family plus within-family selection (FWFS) and combined selection (CS), were used to estimate genetic gain [ E( g)] for stem volume and gene diversity ( GD) for ten theoretical selection intensities in a 108-family, 12-year-old red pine seedling seed orchard. Estimated genetic gain for stem volume ranged from 4.6% to 11.8% across all selection methods and intensities with CS consistently having the highest gains and FS the lowest for any given selection intensity. Genetic diversity ranged from 0.9797 to 0.9954 across all selection methods and intensities. Individual selection was the best selection method for retaining GD, especially at the higher selection intensities, while FWFS was more efficient at the lowest selection intensity. An optimization point, which maximized E( g) and GD relative to each other, was calculated for each selection method. In all cases the optimization point indicated that both E( g) and GD would be favorably high when optimized relative to each other. The implications for volume gain, genetic diversity and potential inbreeding in red pine, a species with inherently low levels of genetic variation, are discussed.

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Provenance and family variation of Pinus oocarpa grown in the Brazilian cerrado

Cited by 17 publications

References 4 publications

Análise da madeira de Pinus oocarpa parte I: estudo dos constituintes macromoleculares e extrativos voláteis

Análise da madeira de Pinus oocarpa parte I: estudo dos constituintes macromoleculares e extrativos voláteis

Random amplified polymorphic DNA and amplified fragment length polymorphism assessment of genetic variation in Nicaraguan populations of Pinus oocarpa

Comparison of selection methods for optimizing genetic gain and gene diversity in a red pine (Pinus resinosa Ait.) seedling seed orchard

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