Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil

Detalhes bibliográficos
Autor(a) principal: Gonçalves,Paulo de Souza
Data de Publicação: 2004
Outros Autores: Martins,Antonio Lúcio Mello, Bortoletto,Nelson, Saes,Luis Alberto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200014
Resumo: Five yield traits were investigated in three-year-old progenies from open-pollinated rubber trees [Hevea brasiliensis (Willd. ex Adr. de Juss) Muell.-Arg.]. Twenty progenies were evaluated in a randomized, complete block design replicated three times using 10 plants per linear plot at the North Central Experimental Station in Pindorama, São Paulo State, Brazil. The characters evaluated included the average yield of rubber, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size. Highly significant (p < 0.01) genetic differences were observed among progenies for most traits. The genotypic variance components accounted for 13.2%, 12.3%, 9.4%, 3.4% and 0.23% of the phenotypic variance for yield, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size, respectively. Heritabilities, as well as genotypic and phenotypic correlations among traits, were estimated. Heritabilities for the above traits at the individual plant level (<img border=0 id="_x0000_i1026" src="../../../../img/revistas/gmb/v27n2/a14img01.gif" align=absmiddle>) were 37%, 35%, 69%, 10% and 16%, respectively. Significant positive genotypic and phenotypic correlations were found between the yield of rubber and growth vigor (r g = 0.73, r p = 0.70), bark thickness (r g = 0.70**, r p = 0.75**) and the total number of latex vessel rings (r g = 0.64, r p = 0.80). There was no relationship between yield and latex vessel size, growth vigor or total number of latex vessel rings. Based on these data, selecting the best two out of 20 progenies would result in a genetic gain of 12.3% and 6.8% for yield of rubber and growth vigor, respectively. The two best individual ortets within each progeny would result in a genetic gain of 27.7% and 9.1%, with a total gain of 40% and 16% for these two traits, respectively.
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spelling Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, BrazilHevea brasiliensisrubber treeheritabilitygenetic parametersFive yield traits were investigated in three-year-old progenies from open-pollinated rubber trees [Hevea brasiliensis (Willd. ex Adr. de Juss) Muell.-Arg.]. Twenty progenies were evaluated in a randomized, complete block design replicated three times using 10 plants per linear plot at the North Central Experimental Station in Pindorama, São Paulo State, Brazil. The characters evaluated included the average yield of rubber, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size. Highly significant (p < 0.01) genetic differences were observed among progenies for most traits. The genotypic variance components accounted for 13.2%, 12.3%, 9.4%, 3.4% and 0.23% of the phenotypic variance for yield, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size, respectively. Heritabilities, as well as genotypic and phenotypic correlations among traits, were estimated. Heritabilities for the above traits at the individual plant level (<img border=0 id="_x0000_i1026" src="../../../../img/revistas/gmb/v27n2/a14img01.gif" align=absmiddle>) were 37%, 35%, 69%, 10% and 16%, respectively. Significant positive genotypic and phenotypic correlations were found between the yield of rubber and growth vigor (r g = 0.73, r p = 0.70), bark thickness (r g = 0.70**, r p = 0.75**) and the total number of latex vessel rings (r g = 0.64, r p = 0.80). There was no relationship between yield and latex vessel size, growth vigor or total number of latex vessel rings. Based on these data, selecting the best two out of 20 progenies would result in a genetic gain of 12.3% and 6.8% for yield of rubber and growth vigor, respectively. The two best individual ortets within each progeny would result in a genetic gain of 27.7% and 9.1%, with a total gain of 40% and 16% for these two traits, respectively.Sociedade Brasileira de Genética2004-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200014Genetics and Molecular Biology v.27 n.2 2004reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572004000200014info:eu-repo/semantics/openAccessGonçalves,Paulo de SouzaMartins,Antonio Lúcio MelloBortoletto,NelsonSaes,Luis Albertoeng2004-07-20T00:00:00Zoai:scielo:S1415-47572004000200014Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2004-07-20T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
title Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
spellingShingle Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
Gonçalves,Paulo de Souza
Hevea brasiliensis
rubber tree
heritability
genetic parameters
title_short Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
title_full Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
title_fullStr Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
title_full_unstemmed Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
title_sort Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
author Gonçalves,Paulo de Souza
author_facet Gonçalves,Paulo de Souza
Martins,Antonio Lúcio Mello
Bortoletto,Nelson
Saes,Luis Alberto
author_role author
author2 Martins,Antonio Lúcio Mello
Bortoletto,Nelson
Saes,Luis Alberto
author2_role author
author
author
dc.contributor.author.fl_str_mv Gonçalves,Paulo de Souza
Martins,Antonio Lúcio Mello
Bortoletto,Nelson
Saes,Luis Alberto
dc.subject.por.fl_str_mv Hevea brasiliensis
rubber tree
heritability
genetic parameters
topic Hevea brasiliensis
rubber tree
heritability
genetic parameters
description Five yield traits were investigated in three-year-old progenies from open-pollinated rubber trees [Hevea brasiliensis (Willd. ex Adr. de Juss) Muell.-Arg.]. Twenty progenies were evaluated in a randomized, complete block design replicated three times using 10 plants per linear plot at the North Central Experimental Station in Pindorama, São Paulo State, Brazil. The characters evaluated included the average yield of rubber, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size. Highly significant (p < 0.01) genetic differences were observed among progenies for most traits. The genotypic variance components accounted for 13.2%, 12.3%, 9.4%, 3.4% and 0.23% of the phenotypic variance for yield, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size, respectively. Heritabilities, as well as genotypic and phenotypic correlations among traits, were estimated. Heritabilities for the above traits at the individual plant level (<img border=0 id="_x0000_i1026" src="../../../../img/revistas/gmb/v27n2/a14img01.gif" align=absmiddle>) were 37%, 35%, 69%, 10% and 16%, respectively. Significant positive genotypic and phenotypic correlations were found between the yield of rubber and growth vigor (r g = 0.73, r p = 0.70), bark thickness (r g = 0.70**, r p = 0.75**) and the total number of latex vessel rings (r g = 0.64, r p = 0.80). There was no relationship between yield and latex vessel size, growth vigor or total number of latex vessel rings. Based on these data, selecting the best two out of 20 progenies would result in a genetic gain of 12.3% and 6.8% for yield of rubber and growth vigor, respectively. The two best individual ortets within each progeny would result in a genetic gain of 27.7% and 9.1%, with a total gain of 40% and 16% for these two traits, respectively.
publishDate 2004
dc.date.none.fl_str_mv 2004-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200014
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dc.language.iso.fl_str_mv eng
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dc.relation.none.fl_str_mv 10.1590/S1415-47572004000200014
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Sociedade Brasileira de Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.27 n.2 2004
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
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instname_str Sociedade Brasileira de Genética (SBG)
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reponame_str Genetics and Molecular Biology
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