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Registro Completo |
Biblioteca(s): |
Embrapa Florestas; Embrapa Gado de Corte. |
Data corrente: |
18/09/2013 |
Data da última atualização: |
16/09/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BRAZ, T. G. dos S.; FONSECA, D. M. da; JANK, L.; RESENDE, M. D. V. de; MARTUSCELLO, J. A.; RESENDE, R. M. S. |
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. |
Título: |
Genetic parameters of agronomic characters in Panicum maximum hybrids. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Revista Brasileira Zootecnia, v.42, n.4, p.231-237, 2013 |
Idioma: |
Inglês Português |
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 |
Palavras-Chave: |
Leaf percentage; Leaf yield; Mixed models; Modelo misto; Morpho-agronomic characters; Porcentagem de folha. |
Thesagro: |
Panicum Maximum; Pastagem; Planta Forrageira. |
Thesaurus Nal: |
Bipolaris maydis; regrowth. |
Categoria do assunto: |
-- |
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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Embrapa Gado de Corte (CNPGC) |
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1. | | CALGARO, M.; BRAGA, M. B. (ed.). A cultura da acerola. 3. ed. rev. e ampl. Brasília, DF: Embrapa, 2012. 144 p. il. color. (Coleção plantar, 69). Projeto Minibibliotecas.Tipo: Autoria/Organização/Edição de Livros |
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