Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/5088 |
Resumo: | The objective of this work was to estimate the repeatability of agronomic traits and to determine the appropriate number of cuts for selectig Urochloa ruziziensis. One hundred and eighteen progenies of half-sib U. ruziziensis and four checks, the cultivars Basilisk (U. decumbens), Marandu (U. brizantha), Comum (U. ruziziensis) and one access Urochloa sp. were evaluated. A randomized complete block with two replications and plots in a 3.0-m line with 1.0x0.5-m spacing was used. Seven cuts were made at intervals of 60 and 90 days in wet and dry seasons, respectively. The evaluated characteristics were: plant height, dry matter weight (DM), fresh matter weight (FM) and percentage of dry matter (PDM). The repeatability was estimated by analysis of variance, principal components of the covariance matrix and of the correlation matrix, and structural analysis using the correlation matrix. Repeatability estimates varied from 0.31–0.38 for plant height, 0.31–0.43 for FM, 0.16–0.50 for PDM and 0.23–0.43 for DM, with coefficients of determination between 57–87%. The number of cuts necessary to assess the actual value of the characteristics ranged between 7–8 cuts for FM and plant height, and 10–14 for DM and PDM, with coefficients of determination greater than 80%. |
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Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensisRepetibilidade de características agronômicas e número de cortes necessários para seleção de Urochloa ruziziensisBrachiaria ruziziensis; Urochloa spp.; efficiency of selection; forage breeding; forage cropsBrachiaria ruziziensis; Urochloa spp.; eficiência de seleção; melhoramento de forrageiras; plantas forrageirasThe objective of this work was to estimate the repeatability of agronomic traits and to determine the appropriate number of cuts for selectig Urochloa ruziziensis. One hundred and eighteen progenies of half-sib U. ruziziensis and four checks, the cultivars Basilisk (U. decumbens), Marandu (U. brizantha), Comum (U. ruziziensis) and one access Urochloa sp. were evaluated. A randomized complete block with two replications and plots in a 3.0-m line with 1.0x0.5-m spacing was used. Seven cuts were made at intervals of 60 and 90 days in wet and dry seasons, respectively. The evaluated characteristics were: plant height, dry matter weight (DM), fresh matter weight (FM) and percentage of dry matter (PDM). The repeatability was estimated by analysis of variance, principal components of the covariance matrix and of the correlation matrix, and structural analysis using the correlation matrix. Repeatability estimates varied from 0.31–0.38 for plant height, 0.31–0.43 for FM, 0.16–0.50 for PDM and 0.23–0.43 for DM, with coefficients of determination between 57–87%. The number of cuts necessary to assess the actual value of the characteristics ranged between 7–8 cuts for FM and plant height, and 10–14 for DM and PDM, with coefficients of determination greater than 80%. O objetivo deste trabalho foi estimar a repetibilidade de características agronômicas e determinar a quantidade adequada de cortes para seleção de Urochloa ruziziensis. Foram avaliadas 118 progênies de meio-irmãos de U. ruziziensis, além das cultivares Basilisk (U. decumbens), Marandu (U. brizantha), Comum (U. ruziziensis) e um acesso de Urochloa sp. como testemunhas. Utilizou-se o delineamento em blocos ao acaso, com duas repetições, parcelas de uma linha com 3,0 m e espaçamento de 1,0x0,5 m. Foram realizados sete cortes, em intervalos médios de 60 e 90 dias, nas épocas chuvosas e secas, respectivamente. Avaliaram-se: altura de planta, massa de matéria seca (MS), massa de matéria verde (MV) e percentagem de matéria seca (PMS). A repetibilidade foi estimada pelos seguintes métodos: análise de variância; componentes principais, pela matriz de covariâncias e pela matriz de correlações; e análise estrutural pela matriz de correlações. As estimativas de repetibilidade variaram de 0,31–0,38 para altura de plantas, 0,31–0,43 para MV, 0,16–0,50 para PMS, e 0,23–0,43 para MS; com coeficientes de determinação entre 57–87%. O número de cortes necessários para estimar o valor real das características variou entre 7–8 para MV e altura de plantas, e 10–14 para MS e PMS, com coeficientes de determinação igual ou superior a 80%.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCNPqSobrinho, Fausto SouzaBorges, VanderleyLédo, Francisco José da SilvaKopp, Maurício Marini2011-01-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5088Pesquisa Agropecuaria Brasileira; v.45, n.6, jun. 2010; 579-584Pesquisa Agropecuária Brasileira; v.45, n.6, jun. 2010; 579-5841678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5088/6040https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/5088/2912info:eu-repo/semantics/openAccess2014-10-17T19:14:00Zoai:ojs.seer.sct.embrapa.br:article/5088Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-17T19:14Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis Repetibilidade de características agronômicas e número de cortes necessários para seleção de Urochloa ruziziensis |
title |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis |
spellingShingle |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis Sobrinho, Fausto Souza Brachiaria ruziziensis; Urochloa spp.; efficiency of selection; forage breeding; forage crops Brachiaria ruziziensis; Urochloa spp.; eficiência de seleção; melhoramento de forrageiras; plantas forrageiras |
title_short |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis |
title_full |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis |
title_fullStr |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis |
title_full_unstemmed |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis |
title_sort |
Agronomic traits repeatability and number of cuts needed for selecting Urochloa ruziziensis |
author |
Sobrinho, Fausto Souza |
author_facet |
Sobrinho, Fausto Souza Borges, Vanderley Lédo, Francisco José da Silva Kopp, Maurício Marini |
author_role |
author |
author2 |
Borges, Vanderley Lédo, Francisco José da Silva Kopp, Maurício Marini |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
CNPq |
dc.contributor.author.fl_str_mv |
Sobrinho, Fausto Souza Borges, Vanderley Lédo, Francisco José da Silva Kopp, Maurício Marini |
dc.subject.por.fl_str_mv |
Brachiaria ruziziensis; Urochloa spp.; efficiency of selection; forage breeding; forage crops Brachiaria ruziziensis; Urochloa spp.; eficiência de seleção; melhoramento de forrageiras; plantas forrageiras |
topic |
Brachiaria ruziziensis; Urochloa spp.; efficiency of selection; forage breeding; forage crops Brachiaria ruziziensis; Urochloa spp.; eficiência de seleção; melhoramento de forrageiras; plantas forrageiras |
description |
The objective of this work was to estimate the repeatability of agronomic traits and to determine the appropriate number of cuts for selectig Urochloa ruziziensis. One hundred and eighteen progenies of half-sib U. ruziziensis and four checks, the cultivars Basilisk (U. decumbens), Marandu (U. brizantha), Comum (U. ruziziensis) and one access Urochloa sp. were evaluated. A randomized complete block with two replications and plots in a 3.0-m line with 1.0x0.5-m spacing was used. Seven cuts were made at intervals of 60 and 90 days in wet and dry seasons, respectively. The evaluated characteristics were: plant height, dry matter weight (DM), fresh matter weight (FM) and percentage of dry matter (PDM). The repeatability was estimated by analysis of variance, principal components of the covariance matrix and of the correlation matrix, and structural analysis using the correlation matrix. Repeatability estimates varied from 0.31–0.38 for plant height, 0.31–0.43 for FM, 0.16–0.50 for PDM and 0.23–0.43 for DM, with coefficients of determination between 57–87%. The number of cuts necessary to assess the actual value of the characteristics ranged between 7–8 cuts for FM and plant height, and 10–14 for DM and PDM, with coefficients of determination greater than 80%. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-25 |
dc.type.none.fl_str_mv |
|
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 |
https://seer.sct.embrapa.br/index.php/pab/article/view/5088 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5088 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/5088/6040 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/5088/2912 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.45, n.6, jun. 2010; 579-584 Pesquisa Agropecuária Brasileira; v.45, n.6, jun. 2010; 579-584 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416673672298496 |