Mean components for choosing maize populations to extract inbred lines

Detalhes bibliográficos
Autor(a) principal: Resende, Ewerton Lélys
Data de Publicação: 2020
Outros Autores: Von Pinho, Renzo Garcia, Silva, Eric Vinicius Vieira, Massitela, João Júlio, Souza, Vander Fillipe de, Souza, João Lucas Dias
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/48354
Resumo: The choice of germplasm is one of the most important phases of a genetic improvement program to the fact that it is the initial development stage of superior hybrids. Hence, the objectives of this study were to obtain the estimates of m+a and d, and inbreeding depression for grain yield and plant height traits, for cultivars lacking this information, and thus to predict the potential of maize hybrids for the extraction of lines. The F1 and F2 generations of 12 maize hybrids were tested at two sites, during the crop years of 2017-18 and 2018-19, accounting for four environments. Both the generations were evaluated in contiguous experiments in randomized blocks design with three and two repetitions during the years 2017-18 and 2018-19, respectively. The data on plant height and grain yield were collected, per plot, from both the generations, utilizing which, the m+a and d mean components were estimated. The effects of dominance had greater importance for the character grain yield. The most promising hybrids for extraction of lines were AG1051, AG8025, BG7046, DKB455, and OMEGA due to their greater estimates of m+a. The hybrids AG8025 and BG7046 were associated with high values of m+a and grain yield. For the plant height trait, there was a greater contribution of additive effects. Therefore, greater inbreeding depression was observed for the grain yield trait when compared to the height of the plant.
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spelling Mean components for choosing maize populations to extract inbred linesComponentes de média para escolha de populações de milho para extração de linhagensMilho - Melhoramento genéticoDepressão por endogamiaHeteroseMaize - Genetic improvementInbreeding depressionHeterosisThe choice of germplasm is one of the most important phases of a genetic improvement program to the fact that it is the initial development stage of superior hybrids. Hence, the objectives of this study were to obtain the estimates of m+a and d, and inbreeding depression for grain yield and plant height traits, for cultivars lacking this information, and thus to predict the potential of maize hybrids for the extraction of lines. The F1 and F2 generations of 12 maize hybrids were tested at two sites, during the crop years of 2017-18 and 2018-19, accounting for four environments. Both the generations were evaluated in contiguous experiments in randomized blocks design with three and two repetitions during the years 2017-18 and 2018-19, respectively. The data on plant height and grain yield were collected, per plot, from both the generations, utilizing which, the m+a and d mean components were estimated. The effects of dominance had greater importance for the character grain yield. The most promising hybrids for extraction of lines were AG1051, AG8025, BG7046, DKB455, and OMEGA due to their greater estimates of m+a. The hybrids AG8025 and BG7046 were associated with high values of m+a and grain yield. For the plant height trait, there was a greater contribution of additive effects. Therefore, greater inbreeding depression was observed for the grain yield trait when compared to the height of the plant.A escolha do germoplasma é uma das fases mais importantes do programa de melhoramento genético do milho pois é o início do desenvolvimento de híbridos superiores. Em vista disso, os objetivos deste estudo foi obter as estimativas de m+a e d, e a depressão por endogamia para as características produtividade de grãos e altura de plantas, e assim predizer o potencial dos híbridos de milho para extração de linhagens. Foram testadas as gerações F1 e F2 de 12 híbridos de milho, em dois locais durante os anos agrícolas de 2017/18 e 2018/19, contabilizando quatro ambientes. As duas gerações, F1 e F2, foram avaliadas em experimentos contíguos no delineamento de blocos casualizados, com três e duas repetições durante os anos 2017/18 e 2018/19, respectivamente. Foram coletados dados de altura de plantas e produtividade de grãos por parcela das duas gerações, e a partir destes dados, foram estimados os componentes de média, m+a e d, para ambas características. Para o caráter produtividade de grãos, os efeitos de dominância apresentaram maior importância. Os híbridos mais promissores para extração de linhagens foram AG1051, AG8025, BG7046, DKB455 e OMEGA uma vez que apresentaram maiores estimativas de m+a. Destacando-se os híbridos AG8025 e BG7046 os quais mostraram altos valores de m+a, além de médias de produtividade elevadas. Para o caráter altura de plantas, houve maior contribuição dos efeitos aditivos. Portanto, observou-se maior depressão por endogamia para o caráter produtividade de grãos quando comparado com altura de plantas.Universidade Federal de Lavras2021-10-08T17:04:09Z2021-10-08T17:04:09Z2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfRESENDE, E. L. et al. Mean components for choosing maize populations to extract inbred lines. Ciência e Agrotecnologia, Lavras, v. 44, e017820, 2020. DOI: 10.1590/1413-7054202044017820 .http://repositorio.ufla.br/jspui/handle/1/48354Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessResende, Ewerton LélysVon Pinho, Renzo GarciaSilva, Eric Vinicius VieiraMassitela, João JúlioSouza, Vander Fillipe deSouza, João Lucas Diaseng2021-10-08T17:04:09Zoai:localhost:1/48354Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-10-08T17:04:09Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Mean components for choosing maize populations to extract inbred lines
Componentes de média para escolha de populações de milho para extração de linhagens
title Mean components for choosing maize populations to extract inbred lines
spellingShingle Mean components for choosing maize populations to extract inbred lines
Resende, Ewerton Lélys
Milho - Melhoramento genético
Depressão por endogamia
Heterose
Maize - Genetic improvement
Inbreeding depression
Heterosis
title_short Mean components for choosing maize populations to extract inbred lines
title_full Mean components for choosing maize populations to extract inbred lines
title_fullStr Mean components for choosing maize populations to extract inbred lines
title_full_unstemmed Mean components for choosing maize populations to extract inbred lines
title_sort Mean components for choosing maize populations to extract inbred lines
author Resende, Ewerton Lélys
author_facet Resende, Ewerton Lélys
Von Pinho, Renzo Garcia
Silva, Eric Vinicius Vieira
Massitela, João Júlio
Souza, Vander Fillipe de
Souza, João Lucas Dias
author_role author
author2 Von Pinho, Renzo Garcia
Silva, Eric Vinicius Vieira
Massitela, João Júlio
Souza, Vander Fillipe de
Souza, João Lucas Dias
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Resende, Ewerton Lélys
Von Pinho, Renzo Garcia
Silva, Eric Vinicius Vieira
Massitela, João Júlio
Souza, Vander Fillipe de
Souza, João Lucas Dias
dc.subject.por.fl_str_mv Milho - Melhoramento genético
Depressão por endogamia
Heterose
Maize - Genetic improvement
Inbreeding depression
Heterosis
topic Milho - Melhoramento genético
Depressão por endogamia
Heterose
Maize - Genetic improvement
Inbreeding depression
Heterosis
description The choice of germplasm is one of the most important phases of a genetic improvement program to the fact that it is the initial development stage of superior hybrids. Hence, the objectives of this study were to obtain the estimates of m+a and d, and inbreeding depression for grain yield and plant height traits, for cultivars lacking this information, and thus to predict the potential of maize hybrids for the extraction of lines. The F1 and F2 generations of 12 maize hybrids were tested at two sites, during the crop years of 2017-18 and 2018-19, accounting for four environments. Both the generations were evaluated in contiguous experiments in randomized blocks design with three and two repetitions during the years 2017-18 and 2018-19, respectively. The data on plant height and grain yield were collected, per plot, from both the generations, utilizing which, the m+a and d mean components were estimated. The effects of dominance had greater importance for the character grain yield. The most promising hybrids for extraction of lines were AG1051, AG8025, BG7046, DKB455, and OMEGA due to their greater estimates of m+a. The hybrids AG8025 and BG7046 were associated with high values of m+a and grain yield. For the plant height trait, there was a greater contribution of additive effects. Therefore, greater inbreeding depression was observed for the grain yield trait when compared to the height of the plant.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021-10-08T17:04:09Z
2021-10-08T17:04:09Z
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 RESENDE, E. L. et al. Mean components for choosing maize populations to extract inbred lines. Ciência e Agrotecnologia, Lavras, v. 44, e017820, 2020. DOI: 10.1590/1413-7054202044017820 .
http://repositorio.ufla.br/jspui/handle/1/48354
identifier_str_mv RESENDE, E. L. et al. Mean components for choosing maize populations to extract inbred lines. Ciência e Agrotecnologia, Lavras, v. 44, e017820, 2020. DOI: 10.1590/1413-7054202044017820 .
url http://repositorio.ufla.br/jspui/handle/1/48354
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras
publisher.none.fl_str_mv Universidade Federal de Lavras
dc.source.none.fl_str_mv Ciência e Agrotecnologia
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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