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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá; Embrapa Amazônia Oriental; Embrapa Florestas. |
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Data corrente: |
10/06/2002 |
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Data da última atualização: |
08/02/2023 |
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Autoria: |
FIGUEIREDO, F. J. C.; ROCHA NETO, O. G. da; CARVALHO, C. J. R. de. |
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Afiliação: |
FRANCISCO JOSE CAMARA FIGUEIREDO, CPATU; OLINTO GOMES DA ROCHA NETO, CPATU; CLAUDIO JOSE REIS DE CARVALHO, CPATU. |
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Título: |
Mobilização de reservas na emergência e desenvolvimento de plântulas de cupuaçuzeiro (Theobroma grandiflorum (Willd.ex.Spreng.) Schum.). 1. Carboidratos. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Revista de Ciências Agrárias, Belém, PA, n. 36, p. 101-119, jul./dez. 2001. |
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Descrição Física: |
il. |
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Idioma: |
Português |
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Conteúdo: |
Com o objetivo de conhecer os sítios de reservas de carboidratos, foram determinadas as quantidades de amido, açúcares solúveis totais e redutores em amostras de sementes, de cotilédones, raízes, epicótilos e folhas de plântulas de cupuaçuzeiro (Theobroma grandiflorum (Wild. ex. Spreng.) Schum.). As plântulas foram oriundas de sementes expostas antes da semeadura a 16°±2°C e 65±5 % UR, por 48, 72, 240 e 480 horas, e a 21°±2°C e 45±5 % UR, por 48 e 72 horas, comparadas com outras provenientes de sementes semeadas imediatamente após o despolpamento manual ou mecânico. A maior fonte de reservas de carboidratos nas sementes foi o amido (13,2 %), seguido de açúcares solúveis totais (8,1 %) e redutores (0,3 %). Aos 30 dias após a semeadura, os cotilédones continuavam sendo os principais sítios de reservas de amido, açúcares solúveis totais e redutores. Aos 90 dias após a semeadura, as reservas de carboidratos nos cotilédones eram mínimas, açúcares solúveis totais (0,21 %) e redutores (0,08 %) e amido (0,05 %). Ao final do estudo, os principais sítios de reservas de amido, açúcares solúveis totais e redutores foram os epicótilos, raízes e epicótilos, respectivamente. |
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Palavras-Chave: |
Açucares solúveis redutores; Açúcares solúveis totais; Açúucares; Cotilédones; Cotyledon; Epicótilo; Epicotyl; Leaf; Reducing solubles sugars; Root; Seed; Total solubles sugars. |
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Thesagro: |
Amido; Carboidrato; Cotilédone; Cupuaçu; Folha; Raiz; Semente; Theobroma Grandiflorum. |
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Thesaurus Nal: |
starch. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/147560/1/1997-7813-1-PB.pdf
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Marc: |
LEADER 02381naa a2200409 a 4500
001 1403221
005 2023-02-08
008 2001 bl uuuu u00u1 u #d
100 1 $aFIGUEIREDO, F. J. C.
245 $aMobilização de reservas na emergência e desenvolvimento de plântulas de cupuaçuzeiro (Theobroma grandiflorum (Willd.ex.Spreng.) Schum.). 1. Carboidratos.
260 $c2001
300 $cil.
520 $aCom o objetivo de conhecer os sítios de reservas de carboidratos, foram determinadas as quantidades de amido, açúcares solúveis totais e redutores em amostras de sementes, de cotilédones, raízes, epicótilos e folhas de plântulas de cupuaçuzeiro (Theobroma grandiflorum (Wild. ex. Spreng.) Schum.). As plântulas foram oriundas de sementes expostas antes da semeadura a 16°±2°C e 65±5 % UR, por 48, 72, 240 e 480 horas, e a 21°±2°C e 45±5 % UR, por 48 e 72 horas, comparadas com outras provenientes de sementes semeadas imediatamente após o despolpamento manual ou mecânico. A maior fonte de reservas de carboidratos nas sementes foi o amido (13,2 %), seguido de açúcares solúveis totais (8,1 %) e redutores (0,3 %). Aos 30 dias após a semeadura, os cotilédones continuavam sendo os principais sítios de reservas de amido, açúcares solúveis totais e redutores. Aos 90 dias após a semeadura, as reservas de carboidratos nos cotilédones eram mínimas, açúcares solúveis totais (0,21 %) e redutores (0,08 %) e amido (0,05 %). Ao final do estudo, os principais sítios de reservas de amido, açúcares solúveis totais e redutores foram os epicótilos, raízes e epicótilos, respectivamente.
650 $astarch
650 $aAmido
650 $aCarboidrato
650 $aCotilédone
650 $aCupuaçu
650 $aFolha
650 $aRaiz
650 $aSemente
650 $aTheobroma Grandiflorum
653 $aAçucares solúveis redutores
653 $aAçúcares solúveis totais
653 $aAçúucares
653 $aCotilédones
653 $aCotyledon
653 $aEpicótilo
653 $aEpicotyl
653 $aLeaf
653 $aReducing solubles sugars
653 $aRoot
653 $aSeed
653 $aTotal solubles sugars
700 1 $aROCHA NETO, O. G. da
700 1 $aCARVALHO, C. J. R. de
773 $tRevista de Ciências Agrárias, Belém, PA$gn. 36, p. 101-119, jul./dez. 2001.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
27/09/2021 |
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Data da última atualização: |
16/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
RESENDE, R. T.; SILVA, P. I. T.; SILVA JUNIOR, O. B. da; FREITAS, M. L. M.; SEBBENN, A. M.; SOUSA, V. A. de; AGUIAR, A. V. de; GRATTAPAGLIA, D. |
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Afiliação: |
RAFAEL T. RESENDE, Universidade federal de Goiás; PEDRO ITALO T. SILVA, Universidade de Brasília; ORZENIL BONFIM DA SILVA JUNIOR, Cenargen; MIGUEL L. MENEZES FREITAS, Instituto Florestal de São Paulo; ALEXANDRE M. SEBBENN, Instituto Florestal de São Paulo; VALDERES APARECIDA DE SOUSA, CNPF; ANANDA VIRGINIA DE AGUIAR, CNPF; DARIO GRATTAPAGLIA, Cenargen. |
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Título: |
Age trends in genetic parameters for growth performance across country-wide provenances of the iconic conifer tree Araucaria angustifolia show strong prospects for systematic breeding and early selection. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 501, 119671, Dec. 2021. 13 p. |
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DOI: |
https://doi.org/10.1016/j.foreco.2021.119671 |
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Idioma: |
Inglês |
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Conteúdo: |
Understanding the growth patterns of long-lived conifer tree species is important to devise breeding and early
selection strategies, predict future biomass productivity and assess adaptive tree fitness for long term conservation efforts. We investigated the genetic variation for growth traits of Araucaria angustifolia, the grandiose
renowned ?Parana ´ pine? tree, in a trial involving 122 families across 15 provenances covering the entire natural
range of the species in Brazil. Measurements at ages 7, 24, 32, 33 and 35 were used to adjust continuous growth
curves based on nonlinear mixed-effect models for all 2158 trees, providing annual estimates for unmeasured
ages in the 7-to-35-year interval. Estimated values closely matched observed ones and a reduction of the coefficient of residual variation was observed in the estimated data, possibly due to removal of random error in the
observed measurements, making the estimated curves more reliable to predict growth patterns. Genetic variation
for growth within provenances was greater than between, with a trend of increasing heritabilities over time for
most provenances. Substantial genetic variation found both within and between families could drive efficient
early selection at both levels. All provenances included individual trees and families with good potential to be
selected for shorter rotations. Growth curves show that trees invest first in height and later in diameter growth.
Considerable variation was observed across provenances for the optimal age and optimal tree volume at which
annual growth increment peaks, a tipping point that could be used as a predictor of the optimal rotation age and
expected tree volume. The data clearly indicate potential for early selection for growth at age 7?10 with an 85%
prediction accuracy of growth at age 35. Additionally, growth data indicate potential of shortening harvest age
from 30?35 to 15?20 years by selecting the best individuals and families. These results underscore the potential
of expanding investments in breeding and plantation forestry of A. angustifolia, which in parallel could contribute
to enhancing conservation efforts of this iconic subtropical conifer. MenosUnderstanding the growth patterns of long-lived conifer tree species is important to devise breeding and early
selection strategies, predict future biomass productivity and assess adaptive tree fitness for long term conservation efforts. We investigated the genetic variation for growth traits of Araucaria angustifolia, the grandiose
renowned ?Parana ´ pine? tree, in a trial involving 122 families across 15 provenances covering the entire natural
range of the species in Brazil. Measurements at ages 7, 24, 32, 33 and 35 were used to adjust continuous growth
curves based on nonlinear mixed-effect models for all 2158 trees, providing annual estimates for unmeasured
ages in the 7-to-35-year interval. Estimated values closely matched observed ones and a reduction of the coefficient of residual variation was observed in the estimated data, possibly due to removal of random error in the
observed measurements, making the estimated curves more reliable to predict growth patterns. Genetic variation
for growth within provenances was greater than between, with a trend of increasing heritabilities over time for
most provenances. Substantial genetic variation found both within and between families could drive efficient
early selection at both levels. All provenances included individual trees and families with good potential to be
selected for shorter rotations. Growth curves show that trees invest first in height and later in diameter growth.
Considerable variation was observed ... Mostrar Tudo |
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Palavras-Chave: |
Conifer breeding; Genetic parameters; Individual tree modeling; Mixed models; Random regression. |
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Thesagro: |
Araucária Angustifólia; Pinheiro do Paraná. |
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Thesaurus NAL: |
Early selection. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/226395/1/1-s2.0-S0378112721007611-main.pdf
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Marc: |
LEADER 03310naa a2200313 a 4500
001 2134780
005 2021-12-16
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.foreco.2021.119671$2DOI
100 1 $aRESENDE, R. T.
245 $aAge trends in genetic parameters for growth performance across country-wide provenances of the iconic conifer tree Araucaria angustifolia show strong prospects for systematic breeding and early selection.$h[electronic resource]
260 $c2021
520 $aUnderstanding the growth patterns of long-lived conifer tree species is important to devise breeding and early selection strategies, predict future biomass productivity and assess adaptive tree fitness for long term conservation efforts. We investigated the genetic variation for growth traits of Araucaria angustifolia, the grandiose renowned ?Parana ´ pine? tree, in a trial involving 122 families across 15 provenances covering the entire natural range of the species in Brazil. Measurements at ages 7, 24, 32, 33 and 35 were used to adjust continuous growth curves based on nonlinear mixed-effect models for all 2158 trees, providing annual estimates for unmeasured ages in the 7-to-35-year interval. Estimated values closely matched observed ones and a reduction of the coefficient of residual variation was observed in the estimated data, possibly due to removal of random error in the observed measurements, making the estimated curves more reliable to predict growth patterns. Genetic variation for growth within provenances was greater than between, with a trend of increasing heritabilities over time for most provenances. Substantial genetic variation found both within and between families could drive efficient early selection at both levels. All provenances included individual trees and families with good potential to be selected for shorter rotations. Growth curves show that trees invest first in height and later in diameter growth. Considerable variation was observed across provenances for the optimal age and optimal tree volume at which annual growth increment peaks, a tipping point that could be used as a predictor of the optimal rotation age and expected tree volume. The data clearly indicate potential for early selection for growth at age 7?10 with an 85% prediction accuracy of growth at age 35. Additionally, growth data indicate potential of shortening harvest age from 30?35 to 15?20 years by selecting the best individuals and families. These results underscore the potential of expanding investments in breeding and plantation forestry of A. angustifolia, which in parallel could contribute to enhancing conservation efforts of this iconic subtropical conifer.
650 $aEarly selection
650 $aAraucária Angustifólia
650 $aPinheiro do Paraná
653 $aConifer breeding
653 $aGenetic parameters
653 $aIndividual tree modeling
653 $aMixed models
653 $aRandom regression
700 1 $aSILVA, P. I. T.
700 1 $aSILVA JUNIOR, O. B. da
700 1 $aFREITAS, M. L. M.
700 1 $aSEBBENN, A. M.
700 1 $aSOUSA, V. A. de
700 1 $aAGUIAR, A. V. de
700 1 $aGRATTAPAGLIA, D.
773 $tForest Ecology and Management$gv. 501, 119671, Dec. 2021. 13 p.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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