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| Candido,Liliam Silvia; Perecin,Dilermando; Landell,Marcos Guimarães de Andrade; Pavan,Bruno Ettore. |
| O objetivo deste trabalho foi estudar diferentes covariáveis de competição em análises de vizinhança, e verificar sua eficiência no aumento da precisão experimental e as consequências no ordenamento de genótipos de cana-de-açúcar em termos de potencial produtivo. Foram utilizados dados da rede de ensaios do programa de melhoramento de cana-de-açúcar do Instituto Agronômico, instalados em 2002. O delineamento foi em blocos ao acaso, com três repetições. As parcelas constituíram-se de cinco sulcos de 8 m, espaçados 1,50 m entre si. A produtividade de colmos por hectare (TCH, Mg ha-1) foi avaliada no primeiro e terceiro cortes. As covariáveis "lateral", "ponta" e "quatro vizinhos" foram incluídas nos métodos de Papadakis, em duas variações do método médias... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Covariância; Médias móveis; Papadakis; Precisão experimental. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000014 |
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| Pavan,Bruno Ettore; Paula,Rinaldo César de; Perecin,Dilermando; Scarpinati,Edimar Aparecido; Candido,Liliam Silvia. |
| The objetive of this work was to evaluate the influence of intergenotypic competition in open-pollinated families of Eucalyptus and its effects on early selection efficiency. Two experiments were carried out, in which the timber volume was evaluated at three ages, in a randomized complete block design. Data from the three years of evaluation (experiment 1, at 2, 4, and 7 years; and experiment 2, at 2, 5, and 7 years) were analyzed using mixed models. The following were estimated: variance components, genetic parameters, selection gains, effective number, early selection efficiency, selection gain per unit time, and coincidence of selection with and without the use of competition covariates. Competition effect was nonsignificant for ages under three years,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Intergenotypic competition; Progeny tests; Selection methods. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000600483 |
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| Pavan,Bruno Ettore; Paula,Rinaldo César de; Perecin,Dilermando; Candido,Liliam Silvia; Scarpinati,Edimar Aparecido. |
| The effect of competition is an important source of variation in breeding experiments. This study aimed to compare the selection of plants of open-pollinated families of Eucalyptus with and without the use of competition covariables. Genetic values were determined for each family and tree and for the traits height, diameter at breast height and timber volume in a randomized block design, resulting in the variance components, genetic parameters, selection gains, effective size and selection coincidence, with and without the use of covariables. Intergenotypic competition is an important factor of environmental variation. The use of competition covariables generally reduces the estimates of variance components and influences genetic gains in the studied... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus spp.; Covariable analysis; Selection gains. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000600011 |
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