Mean components for choosing maize populations to extract inbred lines
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
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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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 |
_version_ |
1815438959838232576 |