Divergência genética entre progênies de Pinus caribaea var. caribaea com base em caracteres quantitativos

Silva, Janete Motta da; Aguiar, A. V. de; Mori, Édson Seizo; Moraes, Mário Luiz Teixeira de

doi:10.4336/2012.pfb.32.69.69

Cited by 13 publications

(13 citation statements)

References 5 publications

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“…In terms of commercial wood species, the group number distribution in our study was very consistent with that reported by Silva et al [ 6 ], who obtained 13 groups with one progeny each. These authors also used Tocher's method to evaluate the morphological traits in Pinus caribaea among different populations.…”

Section: Discussionsupporting

confidence: 91%

“…Knowledge of genetic diversity is important for any breeding strategy and provides a scientific basis for the better management of the genetic heritage of forest species [ 4 ]. On the other hand, clustering progeny according to similarity has become essential for selecting the crossing cultivars based on quantitative traits of economic interest [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Genetic Divergence in Eucalyptus camaldulensis Progenies in the Savanna Biome in Mato Grosso, Brazil

Costa¹,

Silva²,

Skowronski³

et al. 2016

PLoS ONE

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Assessing the parental genetic differences and their subsequent prediction of progeny performance is an important first step to assure the efficiency of any breeding program. In this study, we estimate the genetic divergence in Eucalyptus camaldulensis based on the morphological traits of 132 progenies grown in a savanna biome. Thus, a field experiment was performed using a randomized block design and five replications to compare divergences in total height, commercial height, diameter at breast height, stem form and survival rate at 48 months. Tocher’s clustering method was performed using the Mahalanobis and Euclidian distances. The Mahalanobis distance seemed more reliable for the assessed parameters and clustered all of the progenies into fourteen major groups. The most similar progenies (86 accessions) were clustered into Group I, while the most dissimilar (1 progeny) represented Group XIV. The divergence analysis indicated that promising crosses could be made between progenies allocated in different groups for high genetic divergence and for favorable morphological traits.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Genetic Divergence in Eucalyptus camaldulensis Progenies in the Savanna Biome in Mato Grosso, Brazil

Costa¹,

Silva²,

Skowronski³

et al. 2016

PLoS ONE

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show abstract

“…bahamensis progenies for growth traits, indicating the possibility of promising genetic gains in the first generations of breeding. On the other hand, variety caribaea have showed low genetic variation for quantitative traits in the same site (Silva et al, 2012).…”

Section: Discussionmentioning

confidence: 93%

Genetic variation of wood and resin production inPinus caribaeavar.hondurensisBarret & Golfari

et al. 2016

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The purpose of this work was to estimate genetic parameters and selection gain of Pinus caribaea var. hondurensis progeny trial for wood and resin production as well as correlation between them. Experiment was established in complete lattice square 10 × 10 (triple), 100 treatments, 10 plants per plot, 3 m × 3 m spacing. Twelve years after planting the trial had thinned considerably leaving six plants per plot. Twenty-seven years after planting height, diameter at breast height (dbh) and resin production were measured. Deviance analysis, genetic parameter estimates, selection expected gain, genetic and phenotypic correlation were based on REML/BLUP method. Significant phenotypic differences were observed among and within families for all traits. The thinning at 12 years after planting, contributed positively to dbh increase and resin production, with an average of 30.60 cm and 4.83 kg tree−1year−1. The individual narrow sense heritability ranged from 0.25 to 0.38 for dbh and volume. Genetic and phenotypic correlation between growth traits were positive, and significant. Therefore, different selection strategies will be proposed separately for both traits (resin and wood). The selection gains were significant, especially with 10 % selection intensity (individual selection) for dbh (7.53 %) and resin (13.49 %). The trial has had good performance for growth, resin and genetic variability to support the next breeding generation

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“…Na Tabela 1 observa-se que a variável Altura apresentou baixa variabilidade na área experimental, constatação que pode ser explicada pelo fato dos plantios de Pinus terem origem de progênies com grau elevado seleção ou pureza, e, consequentemente, a variação genética encontrada para os caracteres analisados foi pouco expressiva (SILVA et al, 2012); bem como pelo fato da idade do plantio ser elevada (30 anos) e, com isto, nota-se que com o aumento da idade, pode ocorrer uma homogeneização de determinados atributos dendrométricos dos plantios (Altura), tornando-os, portanto, estatisticamente mais uniformes, conforme dados observados por Hakamada et al (2015) para cultivos de eucalipto no sudeste do Brasil.…”

Section: Resultsunclassified

Produtividade de <i>Pinus caribaea</i> VAR. <i>hondurensis</i> e suas relações com atributos químicos dos solos em região de Cerrado brasileiro

Silva

Montanari

et al. 2019

Ciênc. Florest.

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A silvicultura com espécies exóticas desempenha importante papel socioeconômico no Brasil, fornecendo matéria-prima para a produção de madeira, lenha, carvão e celulose, dentre outros. Nesse sentido, torna-se necessária o aprofundamento do conhecimento sobre as variáveis ambientais que controlam a produtividade do Pinus, em especial, as edáficas. O objetivo do presente trabalho foi avaliar a variabilidade espacial dos atributos químicos de solo e planta em um plantio comercial de Pinus caribaea var. hondurensis. O experimento foi instalado no campus da Faculdade de Engenharia de Ilha Solteira (Unesp), localizado em Selvíria, Estado de Mato Grosso do Sul, Brasil, em um LATOSSOLO VERMELHO Distroférrico, textura muito argilosa. Foram analisados os seguintes atributos químicos do solo: fósforo (P), matéria orgânica (MO), potencial hidrogeniônico (pH), potássio (K), cálcio (Ca), magnésio (Mg), acidez potencial (H+Al), alumínio (Al), soma de bases (SB), capacidade de troca catiônica (CTC), saturação por bases (V%) e, cálcio (CaT), magnésio (MgT) e alumínio (m) na CTC. Pode-se estimar os atributos químicos da camada de 0,10-0,20 m através dos atributos da camada superficial (93%), não sendo, portanto, necessária à coleta dos atributos subsuperficias, representando oportunidades de economia em analises e de coleta de solos para futuros trabalhos. Todos os atributos de solo e planta apresentaram dependência espacial simples na área do estudo, exceto, altura, diâmetro a altura do peito e acidez potencial na camada de 0,10-0,20 m, evidenciando que o manejo de Pinus pode ser realizado de acordo com site especifico nas condições do estudo. O potássio foi o atributo de solo que apresentou cokrigagem com a produtividade de Pinus, bem como os melhores indicadores para a estimativa da produtividade.

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Divergência genética entre progênies de Pinus caribaea var. caribaea com base em caracteres quantitativos

Cited by 13 publications

References 5 publications

Genetic Divergence in Eucalyptus camaldulensis Progenies in the Savanna Biome in Mato Grosso, Brazil

Genetic Divergence in Eucalyptus camaldulensis Progenies in the Savanna Biome in Mato Grosso, Brazil

Genetic variation of wood and resin production inPinus caribaeavar.hondurensisBarret & Golfari

Produtividade de <i>Pinus caribaea</i> VAR. <i>hondurensis</i> e suas relações com atributos químicos dos solos em região de Cerrado brasileiro

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