Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake

Detalhes bibliográficos
Autor(a) principal: Godoy, Thais Galhardo
Data de Publicação: 2015
Outros Autores: Rosado, Sebastião Carlos da Silva
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/14321
Resumo: The objective of this study was the selection of superior genotypes for growth traits, correlating them to initial height growth in the field, at age eight months. A random block design was used in the nursery, with eight clones, three replicates and four plants per plot. And a random block design was also used in the field, with eight clones, four replicate blocks and nine plants per plot. Data being analyzed in the nursery at age 120 days included: height of field seedling, at age eight months (Hc), height of nursery seedling (Hm), root collar diameter (Dc), shoot diameter (Db), shoot dry matter (PMSPA), root dry matter (PMSR), total dry matter (PMST), ratio of shoot dry matter to root dry matter (PMSPA/PMSR), Dickson quality index of root collar diameter (IQD-Dc), Dickson quality index of shoot diameter (IQD-Db). Analyses of variance showed that significant genetic differences exist among clones for all traits and, given the high heritability values found, the estimated genetic gains were generically very high. As for predicted indirect genetic gain, selection in nursery seedlings for Dc, PMSPA/PMSR, IQD-Dc provided the highest values of indirect gain in field seedling height. 
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spelling Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. BlakeEstimativas de ganhos genéticos em caracteres de crescimento em plantas jovens de Eucalyptus urophylla S. T. BlakeInitial growth of seedlingsGeneticsForest improvementInitial seedling growthCrescimento inicial de mudasGenéticaMelhoramento florestalThe objective of this study was the selection of superior genotypes for growth traits, correlating them to initial height growth in the field, at age eight months. A random block design was used in the nursery, with eight clones, three replicates and four plants per plot. And a random block design was also used in the field, with eight clones, four replicate blocks and nine plants per plot. Data being analyzed in the nursery at age 120 days included: height of field seedling, at age eight months (Hc), height of nursery seedling (Hm), root collar diameter (Dc), shoot diameter (Db), shoot dry matter (PMSPA), root dry matter (PMSR), total dry matter (PMST), ratio of shoot dry matter to root dry matter (PMSPA/PMSR), Dickson quality index of root collar diameter (IQD-Dc), Dickson quality index of shoot diameter (IQD-Db). Analyses of variance showed that significant genetic differences exist among clones for all traits and, given the high heritability values found, the estimated genetic gains were generically very high. As for predicted indirect genetic gain, selection in nursery seedlings for Dc, PMSPA/PMSR, IQD-Dc provided the highest values of indirect gain in field seedling height. Objetivou-se, com este estudo, selecionar genótipos superiores para características de crescimento, correlacionando-as com o crescimento inicial em altura no campo, aos oito meses de idade. O delineamento usado no viveiro foi o de blocos casualizados, com oito clones, três repetições e quatro plantas por parcela. O delineamento utilizado no campo também foi de blocos casualizados, com oito clones, quatro blocos e nove plantas por parcela. Os dados avaliados no viveiro aos 120 dias de idade foram: altura das mudas no campo, após oito meses de idade (Hc); altura da muda (Hm); diâmetro do colo da muda (Dc); diâmetro do broto da estaca (Db); peso de matéria seca da parte aérea (PMSPA); peso de matéria seca da raiz (PMSR); peso de matéria seca total (PMST); relação entre peso de matéria seca da parte aérea e peso de matéria seca de raiz (PMSPA/PMSR); índice de qualidade de Dickson do diâmetro do colo (IQD-Dc); índice de qualidade de Dickson do diâmetro do broto (IQD-Db). As análises de variância mostraram que existem diferenças genéticas significativas entre clones para todos caracteres e, tendo em vista os altos valores de herdabilidade encontrados, os ganhos genéticos estimados foram de grande magnitude. No estudo de previsão de ganho genético indireto, verificou-se que a seleção, em mudas no viveiro, para Dc, PMSPA/PMSR, IQD-Dc propiciou os maiores valores de ganho indireto em altura das mudas no campo.Universidade Federal de Lavras (UFLA)2015-05-042017-08-01T20:14:17Z2017-08-01T20:14:17Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfGODOY, T. G.; ROSADO, S. C. da S. Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake. CERNE, Lavras, v. 17, n. 2, p. 189-193, abr./jun. 2011.http://repositorio.ufla.br/jspui/handle/1/143212317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/32/26Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessGodoy, Thais GalhardoRosado, Sebastião Carlos da Silva2021-05-15T00:24:11Zoai:localhost:1/14321Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-05-15T00:24:11Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
Estimativas de ganhos genéticos em caracteres de crescimento em plantas jovens de Eucalyptus urophylla S. T. Blake
title Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
spellingShingle Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
Godoy, Thais Galhardo
Initial growth of seedlings
Genetics
Forest improvement
Initial seedling growth
Crescimento inicial de mudas
Genética
Melhoramento florestal
title_short Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
title_full Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
title_fullStr Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
title_full_unstemmed Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
title_sort Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
author Godoy, Thais Galhardo
author_facet Godoy, Thais Galhardo
Rosado, Sebastião Carlos da Silva
author_role author
author2 Rosado, Sebastião Carlos da Silva
author2_role author
dc.contributor.author.fl_str_mv Godoy, Thais Galhardo
Rosado, Sebastião Carlos da Silva
dc.subject.por.fl_str_mv Initial growth of seedlings
Genetics
Forest improvement
Initial seedling growth
Crescimento inicial de mudas
Genética
Melhoramento florestal
topic Initial growth of seedlings
Genetics
Forest improvement
Initial seedling growth
Crescimento inicial de mudas
Genética
Melhoramento florestal
description The objective of this study was the selection of superior genotypes for growth traits, correlating them to initial height growth in the field, at age eight months. A random block design was used in the nursery, with eight clones, three replicates and four plants per plot. And a random block design was also used in the field, with eight clones, four replicate blocks and nine plants per plot. Data being analyzed in the nursery at age 120 days included: height of field seedling, at age eight months (Hc), height of nursery seedling (Hm), root collar diameter (Dc), shoot diameter (Db), shoot dry matter (PMSPA), root dry matter (PMSR), total dry matter (PMST), ratio of shoot dry matter to root dry matter (PMSPA/PMSR), Dickson quality index of root collar diameter (IQD-Dc), Dickson quality index of shoot diameter (IQD-Db). Analyses of variance showed that significant genetic differences exist among clones for all traits and, given the high heritability values found, the estimated genetic gains were generically very high. As for predicted indirect genetic gain, selection in nursery seedlings for Dc, PMSPA/PMSR, IQD-Dc provided the highest values of indirect gain in field seedling height. 
publishDate 2015
dc.date.none.fl_str_mv 2015-05-04
2017-08-01T20:14:17Z
2017-08-01T20:14:17Z
2017-08-01
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 GODOY, T. G.; ROSADO, S. C. da S. Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake. CERNE, Lavras, v. 17, n. 2, p. 189-193, abr./jun. 2011.
http://repositorio.ufla.br/jspui/handle/1/14321
identifier_str_mv GODOY, T. G.; ROSADO, S. C. da S. Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake. CERNE, Lavras, v. 17, n. 2, p. 189-193, abr./jun. 2011.
url http://repositorio.ufla.br/jspui/handle/1/14321
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.cerne.ufla.br/site/index.php/CERNE/article/view/32/26
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 (UFLA)
publisher.none.fl_str_mv Universidade Federal de Lavras (UFLA)
dc.source.none.fl_str_mv 2317-6342
0104-7760
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)
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