Estimates of genetic gains for growth traits in young plants of Eucalyptus urophylla S. T. Blake
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | |
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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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) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1815439101236609024 |