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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
10/10/2007 |
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Data da última atualização: |
28/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RIGHI, C. A.; BERNARDES, M. S.; LUNZ, A. M. P.; PEREIRA, C. R.; DOURADO NETO, D.; FAVARIN, J. L. |
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Afiliação: |
Ciro Abbud Righi, USP-CENA; Marcos Silveira Bernardes, USP-ESALQ; AURENY MARIA PEREIRA LUNZ, CPAF-AC; Carlos Rodrigues Pereira, UFRRJ; Durval Dourado Neto, USP-ESALQ; José Laercio Favarin, USP- ESALQ. |
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Título: |
Measurement and simulation of solar radiation availability in relation to the growth of coffe plants in an agroforestry system with rubber trees. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Revista Árvore, Viçosa, v. 31, n. 2, p. 195-207, 2007. |
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ISSN: |
0100-6762 (impresso) |
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DOI: |
10.1590/S0100-67622007000200002. |
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Idioma: |
Inglês |
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Conteúdo: |
Solar radiation is an important factor for plant growth, being its availability to understory crops strongly modified by trees in an Agroforestry System (AFS). Coffee trees (Coffea arabica cv. Obatã IAC 1669- 20) were planted at a 3.4 x 0.9 m spacing inside and aside rows of monocrops of 12 year-old rubber trees (Hevea spp.), in Piracicaba-SP, Brazil (22°42'30"S, 47°38'00"W - altitude: 546m). One-year-old coffee plants exposed to 25; 30; 35; 40; 45; 80; 90; 95 and 100% of the total solar radiation were evaluated according to its biophysical parameters of solar radiation interception and capture. The Goudriaan (1977) adapted by Bernardes et al. (1998) model for radiation attenuation fit well to the measured data. Coffee plants tolerate a decrease in solar radiation availability to 50% without undergoing a reduction on growth and LAI, which was approximately 2m2.m-2 under this condition. Further reductions on the availability of solar radiation caused a reduction in LAI (1.5m2.m-2), thus poor land cover and solar radiation interception, resulting in growth reduction. |
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Palavras-Chave: |
Agroforestería; Coffea arabica cv Obatã; Coffee; Cultivo mixto; Desempeño del crecimiento; Hevea spp; Piracicaba (SP); Radiación solar; Rubber tree; São Paulo; Sistema Agroflorestal (SAF). |
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Thesagro: |
Agrossilvicultura; Café; Caucho; Consorciação de cultura; Fator de crescimento; Radiação solar; Seringueira. |
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Thesaurus Nal: |
Agroforestry; Growth performance; Mixed cropping; Solar radiation. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/112746/1/16288.pdf
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Marc: |
LEADER 02486naa a2200469 a 4500
001 1507215
005 2021-07-28
008 2007 bl uuuu u00u1 u #d
022 $a0100-6762 (impresso)
024 7 $a10.1590/S0100-67622007000200002.$2DOI
100 1 $aRIGHI, C. A.
245 $aMeasurement and simulation of solar radiation availability in relation to the growth of coffe plants in an agroforestry system with rubber trees.$h[electronic resource]
260 $c2007
520 $aSolar radiation is an important factor for plant growth, being its availability to understory crops strongly modified by trees in an Agroforestry System (AFS). Coffee trees (Coffea arabica cv. Obatã IAC 1669- 20) were planted at a 3.4 x 0.9 m spacing inside and aside rows of monocrops of 12 year-old rubber trees (Hevea spp.), in Piracicaba-SP, Brazil (22°42'30"S, 47°38'00"W - altitude: 546m). One-year-old coffee plants exposed to 25; 30; 35; 40; 45; 80; 90; 95 and 100% of the total solar radiation were evaluated according to its biophysical parameters of solar radiation interception and capture. The Goudriaan (1977) adapted by Bernardes et al. (1998) model for radiation attenuation fit well to the measured data. Coffee plants tolerate a decrease in solar radiation availability to 50% without undergoing a reduction on growth and LAI, which was approximately 2m2.m-2 under this condition. Further reductions on the availability of solar radiation caused a reduction in LAI (1.5m2.m-2), thus poor land cover and solar radiation interception, resulting in growth reduction.
650 $aAgroforestry
650 $aGrowth performance
650 $aMixed cropping
650 $aSolar radiation
650 $aAgrossilvicultura
650 $aCafé
650 $aCaucho
650 $aConsorciação de cultura
650 $aFator de crescimento
650 $aRadiação solar
650 $aSeringueira
653 $aAgroforestería
653 $aCoffea arabica cv Obatã
653 $aCoffee
653 $aCultivo mixto
653 $aDesempeño del crecimiento
653 $aHevea spp
653 $aPiracicaba (SP)
653 $aRadiación solar
653 $aRubber tree
653 $aSão Paulo
653 $aSistema Agroflorestal (SAF)
700 1 $aBERNARDES, M. S.
700 1 $aLUNZ, A. M. P.
700 1 $aPEREIRA, C. R.
700 1 $aDOURADO NETO, D.
700 1 $aFAVARIN, J. L.
773 $tRevista Árvore, Viçosa$gv. 31, n. 2, p. 195-207, 2007.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
16/11/2022 |
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Data da última atualização: |
23/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
CHAVES, S. F. S.; DIAS, L. A. S.; ALVES, R. S.; ALVES, R. M.; EVANGELISTA, J. S. P. C.; DIAS, K. O. G. |
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Afiliação: |
SAULO F. S. CHAVES, UNIVERSIDADE FEDERAL DE VIÇOSA; LUIZ A. S. DIAS, UNIVERSIDADE FEDERAL DE VIÇOSA; RODRIGO S. ALVES, UNIVERSIDADE FEDERAL DE VIÇOSA; RAFAEL MOYSES ALVES, CPATU; JENIFFER S. P. C. EVANGELISTA, UNIVERSIDADE FEDERAL DE VIÇOSA; KAIO O. G. DIAS, UNIVERSIDADE FEDERAL DE VIÇOSA. |
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Título: |
Leveraging multi-harvest data for increasing genetic gains per unit of time for fruit yield and resistance to witches' broom in Theobroma grandiflorum. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Euphytica, v. 218, Article number 171, 2022. |
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DOI: |
https://doi.org/10.1007/s10681-022-03126-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Theobroma grandiflorum is a perennial fruit-bearing species with a long breeding cycle (~ 12 years). In multi-harvest data analyses, one frequently observes heteroscedasticity and genetic/statistical imbalance, which requires adequate statistical methods. This study aimed to (i) compare multiharvest models with homogenous and heterogeneous residual variance, (ii) define the optimal number of harvests for an accurate genetic selection of T. grandiflorum genotypes, and (iii) select T. grandiflorum hybrid families with high fruit yield and resistance to witches? broom using an additive index. We used a generalized linear mixed model to analyse the resistance to witches? broom. The data refers to anunbalanced trial with 34 triple-cross hybrid families, arranged in a randomized complete block design. We evaluated these families throughout 9 consecutive harvest years regarding fruit yield and resistance to witches? broom. The variance components, genetic parameters and genotypic values were estimated/predicted through residual maximum likelihood/best linear unbiased prediction methodologies. The model with heterogeneous residuals had a better fit than the homogeneous model for the fruit yield trait, according to Akaike information criterion. The results attest to the genetic variability in the evaluated population. To select the best individual for the next breeding cycle, three harvests are enough for selecting accurately for fruit yield and resistance to witches? broom. For commercial release, nine harvests are necessary for both traits. We identified ten high-performance families regarding fruit yield and resistance to witches? broom MenosTheobroma grandiflorum is a perennial fruit-bearing species with a long breeding cycle (~ 12 years). In multi-harvest data analyses, one frequently observes heteroscedasticity and genetic/statistical imbalance, which requires adequate statistical methods. This study aimed to (i) compare multiharvest models with homogenous and heterogeneous residual variance, (ii) define the optimal number of harvests for an accurate genetic selection of T. grandiflorum genotypes, and (iii) select T. grandiflorum hybrid families with high fruit yield and resistance to witches? broom using an additive index. We used a generalized linear mixed model to analyse the resistance to witches? broom. The data refers to anunbalanced trial with 34 triple-cross hybrid families, arranged in a randomized complete block design. We evaluated these families throughout 9 consecutive harvest years regarding fruit yield and resistance to witches? broom. The variance components, genetic parameters and genotypic values were estimated/predicted through residual maximum likelihood/best linear unbiased prediction methodologies. The model with heterogeneous residuals had a better fit than the homogeneous model for the fruit yield trait, according to Akaike information criterion. The results attest to the genetic variability in the evaluated population. To select the best individual for the next breeding cycle, three harvests are enough for selecting accurately for fruit yield and resistance to witches? broom. For comm... Mostrar Tudo |
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Palavras-Chave: |
Genética quantitativa; Interação genótipo por colheita; Modelos mistos. |
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Thesagro: |
Árvore Frutífera; Cupuaçu; Theobroma Grandiflorum. |
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Thesaurus NAL: |
Quantitative genetics. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02586naa a2200277 a 4500
001 2148275
005 2022-11-23
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10681-022-03126-5$2DOI
100 1 $aCHAVES, S. F. S.
245 $aLeveraging multi-harvest data for increasing genetic gains per unit of time for fruit yield and resistance to witches' broom in Theobroma grandiflorum.$h[electronic resource]
260 $c2022
520 $aTheobroma grandiflorum is a perennial fruit-bearing species with a long breeding cycle (~ 12 years). In multi-harvest data analyses, one frequently observes heteroscedasticity and genetic/statistical imbalance, which requires adequate statistical methods. This study aimed to (i) compare multiharvest models with homogenous and heterogeneous residual variance, (ii) define the optimal number of harvests for an accurate genetic selection of T. grandiflorum genotypes, and (iii) select T. grandiflorum hybrid families with high fruit yield and resistance to witches? broom using an additive index. We used a generalized linear mixed model to analyse the resistance to witches? broom. The data refers to anunbalanced trial with 34 triple-cross hybrid families, arranged in a randomized complete block design. We evaluated these families throughout 9 consecutive harvest years regarding fruit yield and resistance to witches? broom. The variance components, genetic parameters and genotypic values were estimated/predicted through residual maximum likelihood/best linear unbiased prediction methodologies. The model with heterogeneous residuals had a better fit than the homogeneous model for the fruit yield trait, according to Akaike information criterion. The results attest to the genetic variability in the evaluated population. To select the best individual for the next breeding cycle, three harvests are enough for selecting accurately for fruit yield and resistance to witches? broom. For commercial release, nine harvests are necessary for both traits. We identified ten high-performance families regarding fruit yield and resistance to witches? broom
650 $aQuantitative genetics
650 $aÁrvore Frutífera
650 $aCupuaçu
650 $aTheobroma Grandiflorum
653 $aGenética quantitativa
653 $aInteração genótipo por colheita
653 $aModelos mistos
700 1 $aDIAS, L. A. S.
700 1 $aALVES, R. S.
700 1 $aALVES, R. M.
700 1 $aEVANGELISTA, J. S. P. C.
700 1 $aDIAS, K. O. G.
773 $tEuphytica$gv. 218, Article number 171, 2022.
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