Use of morphological characteristics for genetic purity evaluation of hybrid corn seed

Detalhes bibliográficos
Autor(a) principal: Pinho, Édila Vilela de Resende Von
Data de Publicação: 1997
Outros Autores: Pinho, Renzo Garcia Von, Cicero, Silvio Moure
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/4730
Resumo: In hybrid corn seed production fields, the incomplete removal of the female parental tassels which liberates its polen promotes the occurence of selfing, the main source of genetic contamination. The present work had the aim of rising morphological characteristics that could be used as markers to identify seeds derived from the selfed female parental mixed in hybrid seed lots. Hybrid seeds and selfed female parental seeds of the single hybrid C 901, the three way hybrid C 808A and the double-cross hybrids C 425 and C 701 were produced. Evaluations were carried out by different investigators on the stages of seedling, plants with 5-7 leaves, harvest and postharvest. The percentage of errors and the standard deviation of the results observed on the four replications of the three investigators were calculated. To verify the deviation significances of the normal curve that occurred during the process of evaluation of the three investigators, the chi-square test (χ2) was used. It was possible to separate, through morphological characteristics, the plants selfed out of hybrid plants, in three out of four cultivars studied. The development stage most apropriate to evaluate the genetic purity has varied with the hybrids.
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spelling Use of morphological characteristics for genetic purity evaluation of hybrid corn seedUtilização de características morfológicas para avaliação da pureza genética em sementes híbridas de milhoselfing; quality; contaminationautofecundação; qualidade; contaminaçãoIn hybrid corn seed production fields, the incomplete removal of the female parental tassels which liberates its polen promotes the occurence of selfing, the main source of genetic contamination. The present work had the aim of rising morphological characteristics that could be used as markers to identify seeds derived from the selfed female parental mixed in hybrid seed lots. Hybrid seeds and selfed female parental seeds of the single hybrid C 901, the three way hybrid C 808A and the double-cross hybrids C 425 and C 701 were produced. Evaluations were carried out by different investigators on the stages of seedling, plants with 5-7 leaves, harvest and postharvest. The percentage of errors and the standard deviation of the results observed on the four replications of the three investigators were calculated. To verify the deviation significances of the normal curve that occurred during the process of evaluation of the three investigators, the chi-square test (χ2) was used. It was possible to separate, through morphological characteristics, the plants selfed out of hybrid plants, in three out of four cultivars studied. The development stage most apropriate to evaluate the genetic purity has varied with the hybrids.Em campos de produção de sementes híbridas de milho, a remoção incompleta dos pendões liberadores de pólen do parental fêmea proporciona a ocorrência de autofecundação, principal causa de contaminação genética dos lotes. O trabalho teve como objetivo levantar características morfológicas que pudessem ser utilizadas como marcadores para a identificação de sementes provenientes do parental fêmea autofecundado misturadas em lotes de sementes híbridas. Foram produzidas sementes dos híbridos C 901, C 808A, C 425 e C 701, sendo o primeiro um híbrido simples; o segundo, triplo; e os dois últimos, duplos; e sementes dos parentais-fêmeas autofecundados. Avaliações foram realizadas por diferentes avaliadores no estádio de plântula, em plantas com cinco a sete folhas, no florescimento, na colheita e na pós-colheita. Foram calculadas as porcentagens de acerto e de erro durante as avaliações e o desvio-padrão da média dos resultados obtidos, por três avaliadores, em quatro repetições. Para verificar a significância dos desvios ocorridos entre os resultados obtidos pelos avaliadores, foi utilizado teste de qui-quadrado (χ2). Foi possível separar, por meio de características morfológicas, as plantas provenientes de autofecundação das plantas híbridas, em três das quatro cultivares estudadas. A fase de desenvolvimento mais adequada para avaliação da pureza genética dos lotes variou com o híbrido.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPinho, Édila Vilela de Resende VonPinho, Renzo Garcia VonCicero, Silvio Moure1997-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4730Pesquisa Agropecuaria Brasileira; v.32, n.9, set. 1997; 941-949Pesquisa Agropecuária Brasileira; v.32, n.9, set. 1997; 941-9491678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4730/7304info:eu-repo/semantics/openAccess2015-03-19T17:30:16Zoai:ojs.seer.sct.embrapa.br:article/4730Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2015-03-19T17:30:16Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
Utilização de características morfológicas para avaliação da pureza genética em sementes híbridas de milho
title Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
spellingShingle Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
Pinho, Édila Vilela de Resende Von
selfing; quality; contamination
autofecundação; qualidade; contaminação
title_short Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
title_full Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
title_fullStr Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
title_full_unstemmed Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
title_sort Use of morphological characteristics for genetic purity evaluation of hybrid corn seed
author Pinho, Édila Vilela de Resende Von
author_facet Pinho, Édila Vilela de Resende Von
Pinho, Renzo Garcia Von
Cicero, Silvio Moure
author_role author
author2 Pinho, Renzo Garcia Von
Cicero, Silvio Moure
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Pinho, Édila Vilela de Resende Von
Pinho, Renzo Garcia Von
Cicero, Silvio Moure
dc.subject.por.fl_str_mv selfing; quality; contamination
autofecundação; qualidade; contaminação
topic selfing; quality; contamination
autofecundação; qualidade; contaminação
description In hybrid corn seed production fields, the incomplete removal of the female parental tassels which liberates its polen promotes the occurence of selfing, the main source of genetic contamination. The present work had the aim of rising morphological characteristics that could be used as markers to identify seeds derived from the selfed female parental mixed in hybrid seed lots. Hybrid seeds and selfed female parental seeds of the single hybrid C 901, the three way hybrid C 808A and the double-cross hybrids C 425 and C 701 were produced. Evaluations were carried out by different investigators on the stages of seedling, plants with 5-7 leaves, harvest and postharvest. The percentage of errors and the standard deviation of the results observed on the four replications of the three investigators were calculated. To verify the deviation significances of the normal curve that occurred during the process of evaluation of the three investigators, the chi-square test (χ2) was used. It was possible to separate, through morphological characteristics, the plants selfed out of hybrid plants, in three out of four cultivars studied. The development stage most apropriate to evaluate the genetic purity has varied with the hybrids.
publishDate 1997
dc.date.none.fl_str_mv 1997-09-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/4730
url https://seer.sct.embrapa.br/index.php/pab/article/view/4730
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/4730/7304
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.32, n.9, set. 1997; 941-949
Pesquisa Agropecuária Brasileira; v.32, n.9, set. 1997; 941-949
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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