Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids.
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088047 |
Resumo: | The objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and leaf:stem ratio had a low magnitude, even when the coefficient was estimated based on the harvests of better stabilization for the other variables. The hybrids achieved genotypic stabilization in the harvests made in the second rainy season. Harvests made in the rainy season provide greater repeatability and determination, and the inclusion of the dry-season harvest is detrimental to the process of selection of low-repeatability traits such as percentage of leaves. |
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Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids.Coefficient of determinationRepeated measuresSelection efficiencyCoeficiente de determinaçãoMedidas repetidasEficiência de seleçãoForragemForageThe objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and leaf:stem ratio had a low magnitude, even when the coefficient was estimated based on the harvests of better stabilization for the other variables. The hybrids achieved genotypic stabilization in the harvests made in the second rainy season. Harvests made in the rainy season provide greater repeatability and determination, and the inclusion of the dry-season harvest is detrimental to the process of selection of low-repeatability traits such as percentage of leaves.Thiago Gomes dos Santos Braz, Universidade Federal dos Vales do Jequitinhonha e Mucuri/Departamento de Zootecnia; Dilermando Miranda da Fonseca, Universidade Federal de Viçosa/Departamento de Zootecnia; LIANA JANK, CNPGC; Cosme Damião Cruz, Universidade Federal de Viçosa/Departamento de Zootecnia; Janaina Azevedo Martuscello, Universidade Federal de São João del-Rei/Departamento de Zootecnia.BRAZ, T. G. dos S.FONSECA, D. M. daJANK, L.CRUZ, C. D.MARTUSCELLO, J. A.2018-02-23T00:32:09Z2018-02-23T00:32:09Z2018-02-2220152018-02-23T00:32:09Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRevista Brasileira de Zootecnia, v. 44, n. 11, p. 377-383, 2015http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088047enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2018-02-23T00:32:17Zoai:www.alice.cnptia.embrapa.br:doc/1088047Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542018-02-23T00:32:17falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542018-02-23T00:32:17Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
title |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
spellingShingle |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. BRAZ, T. G. dos S. Coefficient of determination Repeated measures Selection efficiency Coeficiente de determinação Medidas repetidas Eficiência de seleção Forragem Forage |
title_short |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
title_full |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
title_fullStr |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
title_full_unstemmed |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
title_sort |
Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids. |
author |
BRAZ, T. G. dos S. |
author_facet |
BRAZ, T. G. dos S. FONSECA, D. M. da JANK, L. CRUZ, C. D. MARTUSCELLO, J. A. |
author_role |
author |
author2 |
FONSECA, D. M. da JANK, L. CRUZ, C. D. MARTUSCELLO, J. A. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Thiago Gomes dos Santos Braz, Universidade Federal dos Vales do Jequitinhonha e Mucuri/Departamento de Zootecnia; Dilermando Miranda da Fonseca, Universidade Federal de Viçosa/Departamento de Zootecnia; LIANA JANK, CNPGC; Cosme Damião Cruz, Universidade Federal de Viçosa/Departamento de Zootecnia; Janaina Azevedo Martuscello, Universidade Federal de São João del-Rei/Departamento de Zootecnia. |
dc.contributor.author.fl_str_mv |
BRAZ, T. G. dos S. FONSECA, D. M. da JANK, L. CRUZ, C. D. MARTUSCELLO, J. A. |
dc.subject.por.fl_str_mv |
Coefficient of determination Repeated measures Selection efficiency Coeficiente de determinação Medidas repetidas Eficiência de seleção Forragem Forage |
topic |
Coefficient of determination Repeated measures Selection efficiency Coeficiente de determinação Medidas repetidas Eficiência de seleção Forragem Forage |
description |
The objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and leaf:stem ratio had a low magnitude, even when the coefficient was estimated based on the harvests of better stabilization for the other variables. The hybrids achieved genotypic stabilization in the harvests made in the second rainy season. Harvests made in the rainy season provide greater repeatability and determination, and the inclusion of the dry-season harvest is detrimental to the process of selection of low-repeatability traits such as percentage of leaves. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015 2018-02-23T00:32:09Z 2018-02-23T00:32:09Z 2018-02-22 2018-02-23T00:32:09Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Revista Brasileira de Zootecnia, v. 44, n. 11, p. 377-383, 2015 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088047 |
identifier_str_mv |
Revista Brasileira de Zootecnia, v. 44, n. 11, p. 377-383, 2015 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088047 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503450285834240 |