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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
28/09/2007 |
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Data da última atualização: |
01/02/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
-- - -- |
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Autoria: |
BISON, O.; RAMALHO, M. A. P.; REZENDE, G. D. S. P.; AGUIAR, A. M.; RESENDE, M. D. V. de. |
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Título: |
Comparison between open pollinated progenies and hybrids performance in Eucalyptus grandis and Eucalyptus urophylla. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Separata de: Silvae Genetica, v. 55, n. 4/5, p. 192-196, 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
The cellulose industry in Brazil uses, mainly, hybrids between Eucalyptus grandis x E. urophylla. Not only the volume but also the wood density has great influence in the cellulose productivity, therefore a selection for both characteristics should be done as an alternative to increase the improvement program efficiency. The present work has been carried out with the objective of comparison between Open Pollinated progenies (OP) and hybrids performance in E. grandis and E. urophylla. To do so, 15 OP progenies of E. grandis, 15 OP progenies of E. urophylla, and 15 hybrids between E. grandis x E. urophylla, plus four controls were evaluated. The experiment was carried out from October to November 2001, in three sites, Aracruz and São Mateus, in the Espírito Santo State, and Caravelas, Bahia State, Brazil, in a 14 x 14 lattice design, involving the 49 treatments mentioned plus other progenies not considered in this article, with single tree plots and 40 replicates. Two years later the circumference at breast height (CBH) and the basic wood density (BWD) were evaluated. The hybrids performance for CBH was higher, an average, 38,7% than the OP progenies for both species. Part of the heterosis in relation to parental means could be attributed to the inbreeding depression due to selfing that occurred in the OP progenies and the dominance controlling this character. For the BWD the hybrids performance was the same of the OP progenies. Since there was divergence between the parents, it can be inferred that dominance has no importance for this trait. The negative correlation between the CBH and the BWD could impair the simultaneous selection for both traits, depending on the wood basic density range used by the industry. MenosThe cellulose industry in Brazil uses, mainly, hybrids between Eucalyptus grandis x E. urophylla. Not only the volume but also the wood density has great influence in the cellulose productivity, therefore a selection for both characteristics should be done as an alternative to increase the improvement program efficiency. The present work has been carried out with the objective of comparison between Open Pollinated progenies (OP) and hybrids performance in E. grandis and E. urophylla. To do so, 15 OP progenies of E. grandis, 15 OP progenies of E. urophylla, and 15 hybrids between E. grandis x E. urophylla, plus four controls were evaluated. The experiment was carried out from October to November 2001, in three sites, Aracruz and São Mateus, in the Espírito Santo State, and Caravelas, Bahia State, Brazil, in a 14 x 14 lattice design, involving the 49 treatments mentioned plus other progenies not considered in this article, with single tree plots and 40 replicates. Two years later the circumference at breast height (CBH) and the basic wood density (BWD) were evaluated. The hybrids performance for CBH was higher, an average, 38,7% than the OP progenies for both species. Part of the heterosis in relation to parental means could be attributed to the inbreeding depression due to selfing that occurred in the OP progenies and the dominance controlling this character. For the BWD the hybrids performance was the same of the OP progenies. Since there was divergence between the parents, ... Mostrar Tudo |
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Thesagro: |
Eucalyptus Grandis; Eucalyptus Urophylla; Hibrido. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/32981/1/Comparisom-between-open-pollinated-progenies.pdf
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Marc: |
LEADER 02397naa a2200205 a 4500
001 1313417
005 2018-02-01
008 2006 bl uuuu u00u1 u #d
100 1 $aBISON, O.
245 $aComparison between open pollinated progenies and hybrids performance in Eucalyptus grandis and Eucalyptus urophylla.$h[electronic resource]
260 $c2006
520 $aThe cellulose industry in Brazil uses, mainly, hybrids between Eucalyptus grandis x E. urophylla. Not only the volume but also the wood density has great influence in the cellulose productivity, therefore a selection for both characteristics should be done as an alternative to increase the improvement program efficiency. The present work has been carried out with the objective of comparison between Open Pollinated progenies (OP) and hybrids performance in E. grandis and E. urophylla. To do so, 15 OP progenies of E. grandis, 15 OP progenies of E. urophylla, and 15 hybrids between E. grandis x E. urophylla, plus four controls were evaluated. The experiment was carried out from October to November 2001, in three sites, Aracruz and São Mateus, in the Espírito Santo State, and Caravelas, Bahia State, Brazil, in a 14 x 14 lattice design, involving the 49 treatments mentioned plus other progenies not considered in this article, with single tree plots and 40 replicates. Two years later the circumference at breast height (CBH) and the basic wood density (BWD) were evaluated. The hybrids performance for CBH was higher, an average, 38,7% than the OP progenies for both species. Part of the heterosis in relation to parental means could be attributed to the inbreeding depression due to selfing that occurred in the OP progenies and the dominance controlling this character. For the BWD the hybrids performance was the same of the OP progenies. Since there was divergence between the parents, it can be inferred that dominance has no importance for this trait. The negative correlation between the CBH and the BWD could impair the simultaneous selection for both traits, depending on the wood basic density range used by the industry.
650 $aEucalyptus Grandis
650 $aEucalyptus Urophylla
650 $aHibrido
700 1 $aRAMALHO, M. A. P.
700 1 $aREZENDE, G. D. S. P.
700 1 $aAGUIAR, A. M.
700 1 $aRESENDE, M. D. V. de
773 $tSeparata de: Silvae Genetica$gv. 55, n. 4/5, p. 192-196, 2006.
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Embrapa Florestas (CNPF) |
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