Genetic parameters for drought-tolerance in cassava.
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 EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1022600 |
Resumo: | The objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) were evaluated in 47 cassava accessions. Significant differences were observed among accessions; according to heritability, these differences had mostly a genetic nature. Heritability estimates for genotypic effects ( ) ranged from 0.25±0.12 (NR) to 0.60±0.18 (DMC), and from 0.51±0.17 (NR) to 0.80±0.21 (RoY and StY) for WD and FI, respectively, as a consequence of greater environmental influence on WD. Selective accuracy was lower in WD, and ranged from 0.71 (NR) to 0.89 (RoY, DMC, and StY). However, genetic gains were quite high and ranged from 24.43% (DMC) to 113.41% (StY), in WD, and from 8.5% (DMC) to 75.70% (StY) in FI. These genetic parameters may be useful for defining which selection strategies, breeding methods, and experimental designs are more suitable to obtain cassava genetic gains for tolerance to drought. |
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Genetic parameters for drought-tolerance in cassava.Estresse hídricoMelhoramento de plantaMandiocaMelhoramento vegetalManihot EsculentaBreedingCassavaWater stressThe objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) were evaluated in 47 cassava accessions. Significant differences were observed among accessions; according to heritability, these differences had mostly a genetic nature. Heritability estimates for genotypic effects ( ) ranged from 0.25±0.12 (NR) to 0.60±0.18 (DMC), and from 0.51±0.17 (NR) to 0.80±0.21 (RoY and StY) for WD and FI, respectively, as a consequence of greater environmental influence on WD. Selective accuracy was lower in WD, and ranged from 0.71 (NR) to 0.89 (RoY, DMC, and StY). However, genetic gains were quite high and ranged from 24.43% (DMC) to 113.41% (StY), in WD, and from 8.5% (DMC) to 75.70% (StY) in FI. These genetic parameters may be useful for defining which selection strategies, breeding methods, and experimental designs are more suitable to obtain cassava genetic gains for tolerance to drought.EDER JORGE DE OLIVEIRA, CNPMF; SAULO DE TARSO AIDAR, CPATSA; CAROLINA VIANNA MORGANTE, CPATSA; AGNALDO RODRIGUES DE MELO CHAVES, CPATSA; JAILSON LOPES CRUZ, CNPMF; MAURICIO ANTONIO COELHO FILHO, CNPMF.OLIVEIRA, E. J. deAIDAR, S. de T.MORGANTE, C. V.CHAVES, A. R. de M.CRUZ, J. L.COELHO FILHO, M. A.2015-08-24T11:11:11Z2015-08-24T11:11:11Z2015-08-2420152016-01-28T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 3, p. 233-241, mar. 2015.0100-204Xhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/102260010.1590/S0100-204X2015000300007enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T02:32:11Zoai:www.alice.cnptia.embrapa.br:doc/1022600Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T02:32:11falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T02:32:11Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Genetic parameters for drought-tolerance in cassava. |
title |
Genetic parameters for drought-tolerance in cassava. |
spellingShingle |
Genetic parameters for drought-tolerance in cassava. OLIVEIRA, E. J. de Estresse hídrico Melhoramento de planta Mandioca Melhoramento vegetal Manihot Esculenta Breeding Cassava Water stress |
title_short |
Genetic parameters for drought-tolerance in cassava. |
title_full |
Genetic parameters for drought-tolerance in cassava. |
title_fullStr |
Genetic parameters for drought-tolerance in cassava. |
title_full_unstemmed |
Genetic parameters for drought-tolerance in cassava. |
title_sort |
Genetic parameters for drought-tolerance in cassava. |
author |
OLIVEIRA, E. J. de |
author_facet |
OLIVEIRA, E. J. de AIDAR, S. de T. MORGANTE, C. V. CHAVES, A. R. de M. CRUZ, J. L. COELHO FILHO, M. A. |
author_role |
author |
author2 |
AIDAR, S. de T. MORGANTE, C. V. CHAVES, A. R. de M. CRUZ, J. L. COELHO FILHO, M. A. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
EDER JORGE DE OLIVEIRA, CNPMF; SAULO DE TARSO AIDAR, CPATSA; CAROLINA VIANNA MORGANTE, CPATSA; AGNALDO RODRIGUES DE MELO CHAVES, CPATSA; JAILSON LOPES CRUZ, CNPMF; MAURICIO ANTONIO COELHO FILHO, CNPMF. |
dc.contributor.author.fl_str_mv |
OLIVEIRA, E. J. de AIDAR, S. de T. MORGANTE, C. V. CHAVES, A. R. de M. CRUZ, J. L. COELHO FILHO, M. A. |
dc.subject.por.fl_str_mv |
Estresse hídrico Melhoramento de planta Mandioca Melhoramento vegetal Manihot Esculenta Breeding Cassava Water stress |
topic |
Estresse hídrico Melhoramento de planta Mandioca Melhoramento vegetal Manihot Esculenta Breeding Cassava Water stress |
description |
The objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) were evaluated in 47 cassava accessions. Significant differences were observed among accessions; according to heritability, these differences had mostly a genetic nature. Heritability estimates for genotypic effects ( ) ranged from 0.25±0.12 (NR) to 0.60±0.18 (DMC), and from 0.51±0.17 (NR) to 0.80±0.21 (RoY and StY) for WD and FI, respectively, as a consequence of greater environmental influence on WD. Selective accuracy was lower in WD, and ranged from 0.71 (NR) to 0.89 (RoY, DMC, and StY). However, genetic gains were quite high and ranged from 24.43% (DMC) to 113.41% (StY), in WD, and from 8.5% (DMC) to 75.70% (StY) in FI. These genetic parameters may be useful for defining which selection strategies, breeding methods, and experimental designs are more suitable to obtain cassava genetic gains for tolerance to drought. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-24T11:11:11Z 2015-08-24T11:11:11Z 2015-08-24 2015 2016-01-28T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 3, p. 233-241, mar. 2015. 0100-204X http://www.alice.cnptia.embrapa.br/alice/handle/doc/1022600 10.1590/S0100-204X2015000300007 |
identifier_str_mv |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 3, p. 233-241, mar. 2015. 0100-204X 10.1590/S0100-204X2015000300007 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1022600 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
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Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
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EMBRAPA |
institution |
EMBRAPA |
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Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
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Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503410243862528 |