Assessment of genetic parameters of degradability in maize grains due to indentation scores

Detalhes bibliográficos
Autor(a) principal: Davide, Livia Maria Chamma
Data de Publicação: 2011
Outros Autores: Ramalho, Magno Antônio Patto, Figueiredo, Ulisses José de, Souza, João Cândido de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/38020
Resumo: Maize (Zea mays L.) cultivars with dent grains present higher starch and dry matter ruminal degradability than those with flint grains. This study aimed to assess genetic parameters of degradability in maize grains of different textures and to verify whether there is an association between grain indentation score and ruminal dry matter (RDM) degradability. The evaluated progenies were obtained from the cross between the varieties Cristal (flint) and Cunha (dent), previously selected for grain hardness. Progenies were evaluated for an indentation score using a visual grading scale ranging from 1 (flint) to 5 (dent). To assess the RDM degradability, 5 g were cut into halves, weighed (five grams), stored in bags made of 100% "failet" cloth and incubated for 24 h in the rumen of three ruminally cannulated cows. There was genetic variability for RDM degradability and heritability was 46%, indicating the possibility of success using a selection. There was no association between indentation score and RDM degradability percentage; thus, visual evaluation not always reflects grain hardness per se since it indicates the pericarp aspect but not the endosperm constitution.
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spelling Assessment of genetic parameters of degradability in maize grains due to indentation scoresEstimativas de parâmetros genéticos da degradabilidade de grãos de milho diferindo em escore de identaçãoDegradabilidade ruminalMilho - Dureza dos grãosMaize- Grain hardnessRuminal dry matter degradabilityMaize (Zea mays L.) cultivars with dent grains present higher starch and dry matter ruminal degradability than those with flint grains. This study aimed to assess genetic parameters of degradability in maize grains of different textures and to verify whether there is an association between grain indentation score and ruminal dry matter (RDM) degradability. The evaluated progenies were obtained from the cross between the varieties Cristal (flint) and Cunha (dent), previously selected for grain hardness. Progenies were evaluated for an indentation score using a visual grading scale ranging from 1 (flint) to 5 (dent). To assess the RDM degradability, 5 g were cut into halves, weighed (five grams), stored in bags made of 100% "failet" cloth and incubated for 24 h in the rumen of three ruminally cannulated cows. There was genetic variability for RDM degradability and heritability was 46%, indicating the possibility of success using a selection. There was no association between indentation score and RDM degradability percentage; thus, visual evaluation not always reflects grain hardness per se since it indicates the pericarp aspect but not the endosperm constitution.Cultivares de milho (Zea mays L.) com grãos do tipo dentado possuem maior porcentagem de amido e degradabilidade ruminal da matéria seca do que os com grãos do tipo duro. Estimaram-se parâmetros genéticos da degradabilidade de grãos de milho com diferentes texturas e verificou-se se ocorre associação entre o escore de identação dos grãos visualmente avaliados e a degradabilidade in situ da matéria seca (DISMS). Foram avaliadas progênies oriundas do cruzamento entre a variedade Cristal, de grãos duros, e a variedade Cunha de grãos dentados, previamente selecionadas para a dureza dos grãos. As progênies foram avaliadas com relação ao escore de identação por meio de uma escala visual de notas variando de 1 (duro) a 5 (mole). Para a avaliação da DISMS os grãos foram cortados ao meio, pesados 5 g colocados em saquinhos de tecido "failet" e incubados no rúmen, por 24 h, em três vacas portadoras de cânula ruminal. Há variabilidade genética para a DISMS, com herdabilidade de 46%, indicando ser possível o sucesso com a seleção. Não há associação entre o escore de identação e a porcentagem de DISMS. Assim, a avaliação visual nem sempre reflete a dureza per se dos grãos, pois o que se vê é o aspecto do pericarpo e não a constituição do endosperma.Escola Superior de Agricultura "Luiz de Queiroz"2019-12-06T10:15:03Z2019-12-06T10:15:03Z2011-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfDAVIDE, L. M. C.; RAMALHO, M. A. P.; FIGUEIREDO, U. J. de; SOUZA, J. C. de. Assessment of genetic parameters of degradability in maize grains due to indentation scores. Scientia Agricola, Piracicaba, v. 68, n. 3, p. 347-352, May/June 2011.http://repositorio.ufla.br/jspui/handle/1/38020Scientia Agricolareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessDavide, Livia Maria ChammaRamalho, Magno Antônio PattoFigueiredo, Ulisses José deSouza, João Cândido deeng2019-12-06T10:15:03Zoai:localhost:1/38020Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2019-12-06T10:15:03Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Assessment of genetic parameters of degradability in maize grains due to indentation scores
Estimativas de parâmetros genéticos da degradabilidade de grãos de milho diferindo em escore de identação
title Assessment of genetic parameters of degradability in maize grains due to indentation scores
spellingShingle Assessment of genetic parameters of degradability in maize grains due to indentation scores
Davide, Livia Maria Chamma
Degradabilidade ruminal
Milho - Dureza dos grãos
Maize- Grain hardness
Ruminal dry matter degradability
title_short Assessment of genetic parameters of degradability in maize grains due to indentation scores
title_full Assessment of genetic parameters of degradability in maize grains due to indentation scores
title_fullStr Assessment of genetic parameters of degradability in maize grains due to indentation scores
title_full_unstemmed Assessment of genetic parameters of degradability in maize grains due to indentation scores
title_sort Assessment of genetic parameters of degradability in maize grains due to indentation scores
author Davide, Livia Maria Chamma
author_facet Davide, Livia Maria Chamma
Ramalho, Magno Antônio Patto
Figueiredo, Ulisses José de
Souza, João Cândido de
author_role author
author2 Ramalho, Magno Antônio Patto
Figueiredo, Ulisses José de
Souza, João Cândido de
author2_role author
author
author
dc.contributor.author.fl_str_mv Davide, Livia Maria Chamma
Ramalho, Magno Antônio Patto
Figueiredo, Ulisses José de
Souza, João Cândido de
dc.subject.por.fl_str_mv Degradabilidade ruminal
Milho - Dureza dos grãos
Maize- Grain hardness
Ruminal dry matter degradability
topic Degradabilidade ruminal
Milho - Dureza dos grãos
Maize- Grain hardness
Ruminal dry matter degradability
description Maize (Zea mays L.) cultivars with dent grains present higher starch and dry matter ruminal degradability than those with flint grains. This study aimed to assess genetic parameters of degradability in maize grains of different textures and to verify whether there is an association between grain indentation score and ruminal dry matter (RDM) degradability. The evaluated progenies were obtained from the cross between the varieties Cristal (flint) and Cunha (dent), previously selected for grain hardness. Progenies were evaluated for an indentation score using a visual grading scale ranging from 1 (flint) to 5 (dent). To assess the RDM degradability, 5 g were cut into halves, weighed (five grams), stored in bags made of 100% "failet" cloth and incubated for 24 h in the rumen of three ruminally cannulated cows. There was genetic variability for RDM degradability and heritability was 46%, indicating the possibility of success using a selection. There was no association between indentation score and RDM degradability percentage; thus, visual evaluation not always reflects grain hardness per se since it indicates the pericarp aspect but not the endosperm constitution.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
2019-12-06T10:15:03Z
2019-12-06T10:15:03Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv DAVIDE, L. M. C.; RAMALHO, M. A. P.; FIGUEIREDO, U. J. de; SOUZA, J. C. de. Assessment of genetic parameters of degradability in maize grains due to indentation scores. Scientia Agricola, Piracicaba, v. 68, n. 3, p. 347-352, May/June 2011.
http://repositorio.ufla.br/jspui/handle/1/38020
identifier_str_mv DAVIDE, L. M. C.; RAMALHO, M. A. P.; FIGUEIREDO, U. J. de; SOUZA, J. C. de. Assessment of genetic parameters of degradability in maize grains due to indentation scores. Scientia Agricola, Piracicaba, v. 68, n. 3, p. 347-352, May/June 2011.
url http://repositorio.ufla.br/jspui/handle/1/38020
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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