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| Santos,Mateus Figueiredo; Moro,Gustavo Vitti; Aguiar,Aurélio Mendes; Souza Jr.,Cláudio Lopes de. |
| This paper reports the effects of three cycles of reciprocal recurrent selection (RRS) on the means, genetic variances, and on the genetic correlations for several traits in the IG-1 and IG-2 maize (Zea mays L.) populations. Interpopulation full-sib progenies from cycle zero (C0) and from cycle 3 (C3) of RRS were evaluated in two locations. RRS was highly effective to improve the traits according the objectives of the program: grain yield and prolificacy increased significantly, while plant height, ear height, and ear placement decreased significantly. Genetic variances for all traits decreased significantly from C0 to C3, but the genetic correlations did not change consistently across the cycles of selection. The expected responses to the fourth cycle of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maize; Responses to selection; Genetic variances; Genetic correlations. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500021 |
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| Bison,Odair; Ramalho,Magno Antonio Patto; Rezende,Gabriel Dehon Sampaio Peçanha; Aguiar,Aurélio Mendes; Resende,Marcos Deon Vilela de. |
| In Brazil, eucalyptus breeding programs for cellulose production has used two species, Eucalyptus grandis and Eucalyptus urophylla. Nevertheless, it would be useful to introgress alleles from other species to improve wood quality and volume. The objective of this research was to evaluate the hybrid potential of elite clones of E. grandis and E. urophylla from the Aracruz Celulose Company S. A. with Eucalyptus globulus clones. To do so, six elite clones were crossed with ten E. globulus clones in a half-diallel mating design. The resulting hybrid combinations as well as the four check clones were evaluated in randomized complete block experiments with single plant plots and 40 replicates from September to October 2001 at three Brazilian sites, Aracruz and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diallel; Eucalyptus breeding; Hybrids; Quantitative genetics; Wood quality. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300019 |
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| Aguiar,Marcelo Sfeir de; Ferreira,Daniel Furtado; Aguiar,Aurélio Mendes; Bison,Odair; Rezende,Gabriel Dehon Sampaio Peçanha; Grattapaglia,Dario. |
| O objetivo deste trabalho foi avaliar o potencial dos marcadores microssatélites em predizer o comportamento dos híbridos entre clones-elite de eucalipto da empresa Aracruz Celulose. Foram utilizados 21 clones-elite, cruzados conforme o esquema de dialelo balanceado. Os 137 híbridos obtidos, além dos 21 pais e 11 híbridos repetidos, foram avaliados em três locais: Aracruz, São Mateus e Caravelas, em delineamento de blocos incompletos 13x13 com 40 repetições. As parcelas foram constituídas de uma planta, espaçadas 3x3 m. Os caracteres circunferência à altura do peito (CAP) e densidade básica da madeira foram avaliados aos dois anos de idade. Os dados foram submetidos à análise dialélica e, posteriormente, foi obtida a correlação entre a divergência genética... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Análise dialelo; Divergência genética; Melhoramento genético. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000700013 |
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| Aguiar,Aurélio Mendes; Carlini-Garcia,Luciana Aparecida; Silva,Adelmo Resende da; Santos,Mateus Figueiredo; Garcia,Antonio Augusto Franco; Souza Jr.,Cláudio Lopes de. |
| The utilization of diallel crosses for identification of superior combinations is a common practice in maize (Zea mays L.) breeding programs. This methodology allows the estimation of the combining ability of genotypes being evaluated. In this work, five inbred lines were evaluated as to their general (GCA) and specific (SCA) combining abilities, by using a complete diallel scheme. The single-crosses produced between these inbred lines were evaluated in seven environments, along with two checks, by using a randomized complete block design. Traits analized were: grain yield, plant height, ear height, ear placement, and prolificacy. A diallel analysis was carried out, following an adaptation of Griffing's method IV, in addition to hybrid stability and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diallel crosses; Genotype vs. environment interaction; Grain yield; Adaptability. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100013 |
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