Prediction of genetic gain from selection indices for disease resistance in papaya hybrids

Detalhes bibliográficos
Autor(a) principal: Vivas,Marcelo
Data de Publicação: 2012
Outros Autores: Silveira,Silvaldo Felipe da, Pereira,Messias Gonzaga
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Ceres
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007
Resumo: In order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.
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spelling Prediction of genetic gain from selection indices for disease resistance in papaya hybridscombined selectiongenetic resistanceAsperisporium caricaeeStreptopodium caracaePhoma caricae-papayaeIn order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.Universidade Federal de Viçosa2012-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007Revista Ceres v.59 n.6 2012reponame:Revista Ceresinstname:Universidade Federal de Viçosa (UFV)instacron:UFV10.1590/S0034-737X2012000600007info:eu-repo/semantics/openAccessVivas,MarceloSilveira,Silvaldo Felipe daPereira,Messias Gonzagaeng2015-07-02T00:00:00ZRevista
dc.title.none.fl_str_mv Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
title Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
spellingShingle Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
Vivas,Marcelo
combined selection
genetic resistance
Asperisporium caricaee
Streptopodium caracae
Phoma caricae-papayae
title_short Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
title_full Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
title_fullStr Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
title_full_unstemmed Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
title_sort Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
author Vivas,Marcelo
author_facet Vivas,Marcelo
Silveira,Silvaldo Felipe da
Pereira,Messias Gonzaga
author_role author
author2 Silveira,Silvaldo Felipe da
Pereira,Messias Gonzaga
author2_role author
author
dc.contributor.author.fl_str_mv Vivas,Marcelo
Silveira,Silvaldo Felipe da
Pereira,Messias Gonzaga
dc.subject.por.fl_str_mv combined selection
genetic resistance
Asperisporium caricaee
Streptopodium caracae
Phoma caricae-papayae
topic combined selection
genetic resistance
Asperisporium caricaee
Streptopodium caracae
Phoma caricae-papayae
dc.description.none.fl_txt_mv In order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.
description In order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.
publishDate 2012
dc.date.none.fl_str_mv 2012-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0034-737X2012000600007
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Universidade Federal de Viçosa
publisher.none.fl_str_mv Universidade Federal de Viçosa
dc.source.none.fl_str_mv Revista Ceres v.59 n.6 2012
reponame:Revista Ceres
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str Revista Ceres
collection Revista Ceres
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1728006780422717440

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