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Selection of parents for low nitrogen stress through the combining ability of maize partially inbred lines Agronomy
Heinz, Rafael; Ribeiro, Larissa Pereira; Gonçalves, Manoel Carlos; Bhering, Leonardo Lopes; Teodoro, Paulo Eduardo.
The objective of this work was to estimate the general combining ability of partially inbred lines under high and low nitrogen (N) conditions and to select promising lines to obtain high yields for both conditions. Fifty-five partially inbred S1 progenies were evaluated using the top-cross method, where the lines were crossed with two testers. The 110 top-cross hybrids were evaluated for grain yield during the off-season of 2012 at two sites in the Brazilian Midwest. Partial diallel analysis was performed with the adjusted means of each of the individual analyses of the top crosses. The combining ability of partially inbred lines and testers as well as their interaction with N levels, was estimated for each site. The coefficient of concordance among 15...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diallel; Hybrid combination; Top-cross; Zea mays L. diallel; Hybrid combination; Top-cross; Zea mays L..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42705
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Parental selection for the formation of interspecific hybrid populations of oil palm Agronomy
Peixoto, Leonardo de Azevedo; Bhering, Leonardo Lopes; Gurgel, Fábio de Lima; Gomes Junior, Rui Alberto.
The objective of this work was to select families with superior performance and large genetic variability for diallel crosses for potential use in the pre-breeding of oil palm. The experiment consisted of 42 full-sib families divided into three trials with 16 families and 3 witnesses in common in randomized blocks, with four blocks and 12 plants per block. The characteristics evaluated in the experiment were number of bunches per plant (NBP), bunch weight per plant (BWP) and bunch average weight per plant (BAW). The estimation of variance components showed that there was greater genetic variance within families than between families. The heritability for all traits was high, above 0.75, and the coefficient of environmental variation was low to moderate for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Agrárias e genética e melhoramento de plantas Elaeis guineensis; Cluster analysis; Genetic diversity Melhoramento.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19145
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Interrelations between agronomic and technological fiber traits in upland cotton Agronomy
Teodoro, Paulo Eduardo; Carvalho, Luiz Paulo de; Rodrigues, Josiane Isabela Silva; Farias, Francisco José Correia; Carneiro, Pedro Crescêncio Souza; Bhering, Leonardo Lopes.
Fiber length stands out among technological traits as one that still needs to be improved in cotton. Thus, the objectives of this work were to quantify the interrelations between agronomic and technological fiber traits and to identify traits that could be used for the indirect selection of cotton genotypes with longer fiber lengths. Agronomic and technological traits were evaluated in 36 elite lines of cotton that were cultivated in three environments. Canonical correlations were estimated between two groups of traits: agronomic and technological. Path analysis was performed that considered fiber length as the primary dependent variable. The genotypes presented variability in all the evaluated traits, and no significant genotype vs. environmental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirssutum L.r. latifolium Hutch; Path analysis; Canonical correlations; Indirect selection; Fiber quality..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39364
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Interrelations between agronomic and technological fiber traits in upland cotton Agronomy
Teodoro, Paulo Eduardo; Carvalho, Luiz Paulo de; Rodrigues, Josiane Isabela Silva; Farias, Francisco José Correia; Carneiro, Pedro Crescêncio Souza; Bhering, Leonardo Lopes.
Fiber length stands out among technological traits as one that still needs to be improved in cotton. Thus, the objectives of this work were to quantify the interrelations between agronomic and technological fiber traits and to identify traits that could be used for the indirect selection of cotton genotypes with longer fiber lengths. Agronomic and technological traits were evaluated in 36 elite lines of cotton that were cultivated in three environments. Canonical correlations were estimated between two groups of traits: agronomic and technological. Path analysis was performed that considered fiber length as the primary dependent variable. The genotypes presented variability in all the evaluated traits, and no significant genotype vs. environmental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirssutum L.r. latifolium Hutch; Path analysis; Canonical correlations; Indirect selection; Fiber quality..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39364
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Parental selection in diallel crosses of Jatropha curcas using mixed models Agronomy
Laviola, Bruno Galvêas; Teodoro, Paulo Eduardo; Peixoto, Leonardo de Azevedo; Bhering, Leonardo Lopes.
Diallel crosses in an unbalanced scheme were carried out in Jatropha to (i) evaluate the additive and non-additive genetic components; (ii) select parents through the general combining ability; (iii) estimate the specific combining ability used in the crosses; and (iv) verify the existence of the maternal effect and inbreeding depression. The experiment was carried out in a complete diallel scheme with four progenitors, unbalanced for the number of crosses. The experimental design consisted of a randomized block, with 5 replications and 3 plants per plot. The following characteristics were evaluated: stem diameter (SD), number of branches (NB), plant height (PH), canopy projection on the row (CPR), canopy projection between rows (CPB), mass of hundred...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Agrárias combining ability; REML; BLUP; Plant breeding. Melhoramento vegetal.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35008
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Parental selection in diallel crosses of Jatropha curcas using mixed models Agronomy
Laviola, Bruno Galvêas; Teodoro, Paulo Eduardo; Peixoto, Leonardo de Azevedo; Bhering, Leonardo Lopes.
Diallel crosses in an unbalanced scheme were carried out in Jatropha to (i) evaluate the additive and non-additive genetic components; (ii) select parents through the general combining ability; (iii) estimate the specific combining ability used in the crosses; and (iv) verify the existence of the maternal effect and inbreeding depression. The experiment was carried out in a complete diallel scheme with four progenitors, unbalanced for the number of crosses. The experimental design consisted of a randomized block, with 5 replications and 3 plants per plot. The following characteristics were evaluated: stem diameter (SD), number of branches (NB), plant height (PH), canopy projection on the row (CPR), canopy projection between rows (CPB), mass of hundred...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Combining ability; REML; BLUP; Plant breeding.; Melhoramento vegetal.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35008
Registros recuperados: 6
Primeira ... 1 ... Última
 

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