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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas; Embrapa Gado de Corte. |
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Data corrente: |
18/09/2013 |
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Data da última atualização: |
16/09/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BRAZ, T. G. dos S.; FONSECA, D. M. da; JANK, L.; RESENDE, M. D. V. de; MARTUSCELLO, J. A.; RESENDE, R. M. S. |
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Afiliação: |
THIAGO GOMES DOS SANTOS BRAZ, Programa de Pós-Graduação em Zootecnia, Universidade Federal de Viçosa.; DILERMANDO MIRANDA DA FONSECA, Departamento de Zootecnia, Universidade Federal de Viçosa.; LIANA JANK, CNPGC; MARCOS DEON VILELA DE RESENDE, CNPF; JANAINA AZEVEDO MARTUSCELLO, Departamento de Zootecnia, Universidade Federal de São João del-Rei.; ROSANGELA MARIA SIMEAO RESENDE, CNPGC. |
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Título: |
Genetic parameters of agronomic characters in Panicum maximum hybrids. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Revista Brasileira Zootecnia, v.42, n.4, p.231-237, 2013 |
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Idioma: |
Inglês
Português |
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Conteúdo: |
This study was carried out with the objective of estimating the genetic parameters of agronomic traits in Panicum maximum hybrids. Genotypes obtained from the crosses between the sexual plants S10 and S12 and cultivars Tanzania and Mombasa were evaluated. The design was an incomplete blocks design with two replicates (clones) and 33 blocks. Each block was constituted by three lines or plots with nine plants each, which were evaluated in six harvests. All the characters presented low broad sense heritabilities for both the individual harvest and for the mean of harvests and a large difference between the heritability and the individual repeatability coefficient, which may be due to the high permanent environmental variance, mainly for forage dry matter and leaf dry matter. On the other hand, the percentage of leaves also presented low repeatability and permanent environmental variance. The genotypic coefficients of variation were high, except for leaf percentage, but they were also associated with high residual coefficients of variation. Both the broad sense heritabilities per harvest and for the mean of harvests were of moderate magnitude for the agronomic traits evaluated in hybrid individuals of P. maximum. On the other hand, there is variability for selection of important characters such as total and leaf dry matter yields and selection for leaf percentage needs a greater number of harvests to improve selection efficiency. The genotypes presented great variability for Bipolaris maydis leaf spot incidence and this character can be included in the P. maximum breeding program. MenosThis study was carried out with the objective of estimating the genetic parameters of agronomic traits in Panicum maximum hybrids. Genotypes obtained from the crosses between the sexual plants S10 and S12 and cultivars Tanzania and Mombasa were evaluated. The design was an incomplete blocks design with two replicates (clones) and 33 blocks. Each block was constituted by three lines or plots with nine plants each, which were evaluated in six harvests. All the characters presented low broad sense heritabilities for both the individual harvest and for the mean of harvests and a large difference between the heritability and the individual repeatability coefficient, which may be due to the high permanent environmental variance, mainly for forage dry matter and leaf dry matter. On the other hand, the percentage of leaves also presented low repeatability and permanent environmental variance. The genotypic coefficients of variation were high, except for leaf percentage, but they were also associated with high residual coefficients of variation. Both the broad sense heritabilities per harvest and for the mean of harvests were of moderate magnitude for the agronomic traits evaluated in hybrid individuals of P. maximum. On the other hand, there is variability for selection of important characters such as total and leaf dry matter yields and selection for leaf percentage needs a greater number of harvests to improve selection efficiency. The genotypes presented great variability for Bip... Mostrar Tudo |
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Palavras-Chave: |
Leaf percentage; Leaf yield; Mixed models; Modelo misto; Morpho-agronomic characters; Porcentagem de folha. |
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Thesagro: |
Panicum Maximum; Pastagem; Planta Forrageira. |
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Thesaurus Nal: |
Bipolaris maydis; regrowth. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/94234/1/Genetic-parameters-of-agronomic-characters-in-Panicum-maximum-hybrids.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/89684/1/Deon-RBZ-Genetic.pdf
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Marc: |
LEADER 02493naa a2200313 a 4500
001 1974228
005 2015-09-16
008 2013 bl uuuu u00u1 u #d
100 1 $aBRAZ, T. G. dos S.
245 $aGenetic parameters of agronomic characters in Panicum maximum hybrids.$h[electronic resource]
260 $c2013
520 $aThis study was carried out with the objective of estimating the genetic parameters of agronomic traits in Panicum maximum hybrids. Genotypes obtained from the crosses between the sexual plants S10 and S12 and cultivars Tanzania and Mombasa were evaluated. The design was an incomplete blocks design with two replicates (clones) and 33 blocks. Each block was constituted by three lines or plots with nine plants each, which were evaluated in six harvests. All the characters presented low broad sense heritabilities for both the individual harvest and for the mean of harvests and a large difference between the heritability and the individual repeatability coefficient, which may be due to the high permanent environmental variance, mainly for forage dry matter and leaf dry matter. On the other hand, the percentage of leaves also presented low repeatability and permanent environmental variance. The genotypic coefficients of variation were high, except for leaf percentage, but they were also associated with high residual coefficients of variation. Both the broad sense heritabilities per harvest and for the mean of harvests were of moderate magnitude for the agronomic traits evaluated in hybrid individuals of P. maximum. On the other hand, there is variability for selection of important characters such as total and leaf dry matter yields and selection for leaf percentage needs a greater number of harvests to improve selection efficiency. The genotypes presented great variability for Bipolaris maydis leaf spot incidence and this character can be included in the P. maximum breeding program.
650 $aBipolaris maydis
650 $aregrowth
650 $aPanicum Maximum
650 $aPastagem
650 $aPlanta Forrageira
653 $aLeaf percentage
653 $aLeaf yield
653 $aMixed models
653 $aModelo misto
653 $aMorpho-agronomic characters
653 $aPorcentagem de folha
700 1 $aFONSECA, D. M. da
700 1 $aJANK, L.
700 1 $aRESENDE, M. D. V. de
700 1 $aMARTUSCELLO, J. A.
700 1 $aRESENDE, R. M. S.
773 $tRevista Brasileira Zootecnia$gv.42, n.4, p.231-237, 2013
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
13/02/2004 |
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Data da última atualização: |
30/03/2023 |
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Autoria: |
SANTOS, R. C. dos; MARCELLINO, L. H.; PONTES, R. G. M. S. de; GANDER, E. S. |
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Afiliação: |
ROSEANE CAVALCANTI DOS SANTOS, CNPA; LUCILIA HELENA MARCELLINO, Cenargen; ROSE GOMES MONNERAT SOLON DE PONTES, Cenargen; Eugen Silvano Gander, Cenargen. |
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Título: |
Mechanical damage in cotton buds caused by the boll weevil. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 11, p. 1351-1356, nov. 2003 |
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Idioma: |
Inglês |
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Notas: |
Notas Científicas.
Título em português: Danos mecânicos em botões florais de algodão causados pelo bicudo-do-algodoeiro. |
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Conteúdo: |
The boll weevil (Anthonomus grandis Boheman) causes high levels of bud abscission in cotton plants due to feeding or oviposition punctures. It has been reported that abscission is mainly due to enzymes present in the insect's saliva, but mechanical damage could also contribute to square abscission. The objective of this paper was to undertake an analysis of the morphological damages caused by the insect in cotton squares using microscopy. Anthers and ovules are the main target of boll weevil feeding. The process initiates by perforation of young sepal and petal tissues and proceeds with subsequent alimentation on stamen and ovary leading to abscission of floral structures. |
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Palavras-Chave: |
abscisão; alimentação animal. |
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Thesagro: |
Anthonomus Grandis; Gossypium Hirsutum. |
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Thesaurus NAL: |
abscission; animal feeding. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/25835/1/v38n11a15.pdf
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Marc: |
LEADER 01515naa a2200241 a 4500
001 1109678
005 2023-03-30
008 2003 bl uuuu u00u1 u #d
100 1 $aSANTOS, R. C. dos
245 $aMechanical damage in cotton buds caused by the boll weevil.$h[electronic resource]
260 $c2003
500 $aNotas Científicas. Título em português: Danos mecânicos em botões florais de algodão causados pelo bicudo-do-algodoeiro.
520 $aThe boll weevil (Anthonomus grandis Boheman) causes high levels of bud abscission in cotton plants due to feeding or oviposition punctures. It has been reported that abscission is mainly due to enzymes present in the insect's saliva, but mechanical damage could also contribute to square abscission. The objective of this paper was to undertake an analysis of the morphological damages caused by the insect in cotton squares using microscopy. Anthers and ovules are the main target of boll weevil feeding. The process initiates by perforation of young sepal and petal tissues and proceeds with subsequent alimentation on stamen and ovary leading to abscission of floral structures.
650 $aabscission
650 $aanimal feeding
650 $aAnthonomus Grandis
650 $aGossypium Hirsutum
653 $aabscisão
653 $aalimentação animal
700 1 $aMARCELLINO, L. H.
700 1 $aPONTES, R. G. M. S. de
700 1 $aGANDER, E. S.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 38, n. 11, p. 1351-1356, nov. 2003
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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