Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)

Detalhes bibliográficos
Autor(a) principal: Ferreira, Vitor Guerra [UNESP]
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/134097
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-01-2016/000857482.pdf
Resumo: Being a plant of the Americas, maize cultivation occurs throughout Brazil, and in most regions is carried out in two seasons: first crop or summer crop and second crop. Although the average of grain yield of maize in Brazil is still considered low, technologies such as the development of hybrid cultivars gave the producers a considerable increase of grain yield. However, so that grain yield can continue to evolve gradually, the process of obtaining new cultivars runs continuously by breeders. For maize, the single-cross hybrids are advancing rapidly over other types of hybrid (triple and double) in recognition of its high yield potential in technified crops. The objective of this study was to identify, at the end of the complete process of hybrids formation, those most promising and with agronomic characteristics of a modern hybrid, between 36 single-cross hybrids obtained from brachytic inbred lines and not brachytic inbred lines. The experimental hybrids and six checks were evaluated in a randomized block design with four replications, in Selvíria- MS in four seasons: 2012/13 first crop (season 1), 2012/2013 second crop (season 2), 2013/14 first crop (season 3) and 2013/2014 second crop (season 4). The evaluated traits were days to silking, plant height, ear height, ear length, ear diameter, prolificacy, lodged and broken plants and grain yield. For common hybrids in every season, an analysis of stability and adaptability for grain yield was carried out by the regression method of Heberhart and Rusell. Based on the individual and stability and adaptability analysis, there were identified the following hybrids with potential for evaluations in official testing for both first and second crop: IVF1-6/IVD1-3, 8F/9D, 8F/6D, IVF1- 5/IVD1-8, 5F/9D and 10F/9D. All showed good average for grain yield, stability and responded to the improvement of the environment, of which the first three are early. The ...
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spelling Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)Melhoramento geneticoMilho hibridoMilho - GenéticaBreedingBeing a plant of the Americas, maize cultivation occurs throughout Brazil, and in most regions is carried out in two seasons: first crop or summer crop and second crop. Although the average of grain yield of maize in Brazil is still considered low, technologies such as the development of hybrid cultivars gave the producers a considerable increase of grain yield. However, so that grain yield can continue to evolve gradually, the process of obtaining new cultivars runs continuously by breeders. For maize, the single-cross hybrids are advancing rapidly over other types of hybrid (triple and double) in recognition of its high yield potential in technified crops. The objective of this study was to identify, at the end of the complete process of hybrids formation, those most promising and with agronomic characteristics of a modern hybrid, between 36 single-cross hybrids obtained from brachytic inbred lines and not brachytic inbred lines. The experimental hybrids and six checks were evaluated in a randomized block design with four replications, in Selvíria- MS in four seasons: 2012/13 first crop (season 1), 2012/2013 second crop (season 2), 2013/14 first crop (season 3) and 2013/2014 second crop (season 4). The evaluated traits were days to silking, plant height, ear height, ear length, ear diameter, prolificacy, lodged and broken plants and grain yield. For common hybrids in every season, an analysis of stability and adaptability for grain yield was carried out by the regression method of Heberhart and Rusell. Based on the individual and stability and adaptability analysis, there were identified the following hybrids with potential for evaluations in official testing for both first and second crop: IVF1-6/IVD1-3, 8F/9D, 8F/6D, IVF1- 5/IVD1-8, 5F/9D and 10F/9D. All showed good average for grain yield, stability and responded to the improvement of the environment, of which the first three are early. The ...Sendo uma planta originária das Américas, o cultivo de milho ocorre em todo território brasileiro, sendo que na maioria das regiões é realizado em duas épocas: primeira safra ou safra de verão e segunda safra ou safrinha. Embora o rendimento médio de milho no Brasil ainda seja considerado baixo em comparação com diversos países, tecnologias como o desenvolvimento de cultivares híbridas proporcionou aos produtores uma evolução considerável de rendimento. Entretanto, para que os níveis de rendimento possam continuar evoluindo gradativamente, o processo de obtenção de novas cultivares é continuamente executado pelos melhoristas. No caso do milho, os híbridos simples estão avançando rapidamente sobre os demais tipos de híbridos (triplos e duplos), em reconhecimento ao seu alto potencial de rendimento em cultivos tecnificados. O objetivo deste estudo foi identificar no final do processo completo da formação de híbridos, aqueles mais promissores e com características agronômicas de um híbrido moderno, entre 36 híbridos simples provenientes de linhagens de origem braquítica e de porte mais elevado. Os híbridos experimentais e mais seis testemunhas, foram avaliados em blocos casualizados com quatro repetições, na fazenda experimental da UNESP em Selvíria-MS em quatro épocas: primeira safra 2012/13 (primeira época), segunda safra 2012/2013 (segunda época), primeira safra 2013/14 (terceira época) e segunda safra 2013/2014 (quarta época). Foram avaliados os caracteres dias para florescimento feminino, altura de plantas, altura de espigas, comprimento de espigas, diâmetro de espigas, prolificidade, acamamento mais quebramento e rendimento de grãos. Para os híbridos comuns em todas as épocas, foi realizada uma análise de estabilidade e adaptabilidade de rendimento, pelo método de Herberhart e Russel (1966). Com base nas análises individuais e de estabilidade e...Universidade Estadual Paulista (Unesp)Andrade, João Antonio da Costa [UNESP]Universidade Estadual Paulista (Unesp)Ferreira, Vitor Guerra [UNESP]2016-02-05T18:29:42Z2016-02-05T18:29:42Z2015-08-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis92 f. : il.application/pdfFERREIRA, Vitor Guerra. Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.). 2015. 92 f. Dissertação (mestrado) - Universidade Estadual Paulista Julio de Mesquita Filho, Faculdade de Engenharia, 2015.http://hdl.handle.net/11449/134097000857482http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-01-2016/000857482.pdf33004099079P15882313228729594Alephreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporinfo:eu-repo/semantics/openAccess2024-07-10T19:48:18Zoai:repositorio.unesp.br:11449/134097Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:44:25.022401Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
title Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
spellingShingle Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
Ferreira, Vitor Guerra [UNESP]
Melhoramento genetico
Milho hibrido
Milho - Genética
Breeding
title_short Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
title_full Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
title_fullStr Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
title_full_unstemmed Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
title_sort Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)
author Ferreira, Vitor Guerra [UNESP]
author_facet Ferreira, Vitor Guerra [UNESP]
author_role author
dc.contributor.none.fl_str_mv Andrade, João Antonio da Costa [UNESP]
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Ferreira, Vitor Guerra [UNESP]
dc.subject.por.fl_str_mv Melhoramento genetico
Milho hibrido
Milho - Genética
Breeding
topic Melhoramento genetico
Milho hibrido
Milho - Genética
Breeding
description Being a plant of the Americas, maize cultivation occurs throughout Brazil, and in most regions is carried out in two seasons: first crop or summer crop and second crop. Although the average of grain yield of maize in Brazil is still considered low, technologies such as the development of hybrid cultivars gave the producers a considerable increase of grain yield. However, so that grain yield can continue to evolve gradually, the process of obtaining new cultivars runs continuously by breeders. For maize, the single-cross hybrids are advancing rapidly over other types of hybrid (triple and double) in recognition of its high yield potential in technified crops. The objective of this study was to identify, at the end of the complete process of hybrids formation, those most promising and with agronomic characteristics of a modern hybrid, between 36 single-cross hybrids obtained from brachytic inbred lines and not brachytic inbred lines. The experimental hybrids and six checks were evaluated in a randomized block design with four replications, in Selvíria- MS in four seasons: 2012/13 first crop (season 1), 2012/2013 second crop (season 2), 2013/14 first crop (season 3) and 2013/2014 second crop (season 4). The evaluated traits were days to silking, plant height, ear height, ear length, ear diameter, prolificacy, lodged and broken plants and grain yield. For common hybrids in every season, an analysis of stability and adaptability for grain yield was carried out by the regression method of Heberhart and Rusell. Based on the individual and stability and adaptability analysis, there were identified the following hybrids with potential for evaluations in official testing for both first and second crop: IVF1-6/IVD1-3, 8F/9D, 8F/6D, IVF1- 5/IVD1-8, 5F/9D and 10F/9D. All showed good average for grain yield, stability and responded to the improvement of the environment, of which the first three are early. The ...
publishDate 2015
dc.date.none.fl_str_mv 2015-08-27
2016-02-05T18:29:42Z
2016-02-05T18:29:42Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv FERREIRA, Vitor Guerra. Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.). 2015. 92 f. Dissertação (mestrado) - Universidade Estadual Paulista Julio de Mesquita Filho, Faculdade de Engenharia, 2015.
http://hdl.handle.net/11449/134097
000857482
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-01-2016/000857482.pdf
33004099079P1
5882313228729594
identifier_str_mv FERREIRA, Vitor Guerra. Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.). 2015. 92 f. Dissertação (mestrado) - Universidade Estadual Paulista Julio de Mesquita Filho, Faculdade de Engenharia, 2015.
000857482
33004099079P1
5882313228729594
url http://hdl.handle.net/11449/134097
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-01-2016/000857482.pdf
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 92 f. : il.
application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual Paulista (Unesp)
publisher.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.source.none.fl_str_mv Aleph
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
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instname_str Universidade Estadual Paulista (UNESP)
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institution UNESP
reponame_str Repositório Institucional da UNESP
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repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
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