Maize Single Crosses
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. The usefulness of GGE biplot methodology for line × tester data of maize inbred lines
ABSTRACT The genotype + genotype × environment (GGE) biplot methodology has the potential to determine combining ability effects, identify efficient testers, and distinct heterotic groups in a line × tester study. However, it has not been adequately applied for such analysis. Therefore, this study was done to assess the combining ability of some maize inbr
Bragantia. Publicado em: 2020-12
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2. Seleção genômica ampla e novos métodos de melhoramento do milho / Genome wide selection and new methods of maize breeding
The evaluation for nutrient efficiency use (UE) generally use destructive methods of the plant, not allowing, depending on the population genetic structure, using those identified as superior in hybridizations. Consequently, there is a reduction in the potential gains with selection. Additionally, some conventional breeding methods, such as the recurrent sel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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3. Viability of reciprocal recurrent selection in populations derived from single-cross maize hybrids / Viabilidade da seleÃÃo recorrente recÃproca em populaÃÃes derivadas de hÃbrido simples de milho
In a recurrent selection program it is primordial to know whether genetic progress has been reached and the existence of genetic variability for future selection cycles. Thus, this work was carried out to evaluate the genetic progress up to C2, on a first stage, and to estimate genetic variance and covariance components, responses to selection and heterosis
Publicado em: 2009
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4. Genetic effects for maize traits in acid and non-acid soils
Breeding programs for acid-soil tolerance are desirable as a relatively inexpensive and permanent way for increasing maize (Zea mays L.) yield on these soils. Our objective was to compare the genetic effects controlling the expression of maize traits in acid and non-acid soils. Seven related and one unrelated inbred lines, with different levels of tolerance
Genetics and Molecular Biology. Publicado em: 2008
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5. Predição de valores genotípicos de híbridos de milho com desbalanceamentos de genótipos e ambientes / Predicting maize single-crosses genotypic values under unbalanced number of genotypes and environments
A fase mais difícil e que exige mais recursos em um programa de melhoramento de milho é a avaliação experimental dos híbridos, pois geralmente um elevado número de híbridos necessita ser avaliado em diversos ambientes. Deste modo, tanto o número de híbridos como o de ambientes são limitados pelos recursos disponíveis, o que poderia levar a uma red
Publicado em: 2008
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6. Combining ability analysis for grain filling duration and yield traits in spring wheat (Triticum aestivum L. em. Thell.)
A diallel analysis of wheat (Triticum aestivum L. em. Thell) parents (n = 11) and their F1 (n = 55) and F2 (n = 55) offspring was carried out for the following four traits: grain filling duration (GFD), GFD for growing degree days (GDD), 1000 seed weight and seed yield per plant. Analysis of variance for general combining ability (GCA) and specific combining
Genetics and Molecular Biology. Publicado em: 2007-03
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7. Herança da senescência retardada em milho / Inheritance of the delayed senescence trait in Maize
Information on the inheritance of traits to be selected is of paramount importance for the success of breeding programs. The trait delayed senescence, usually named "stay-green" trait, has been related to tolerance to abiotic stresses, mainly drought stress, in several crop species. Although the majority of commercial maize hybrids are "stay-green", limited
Publicado em: 2007
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8. Efeito xÃnia em hÃbridos comerciais de milho visando ao aumento da produtividade / Xenia effect in commercial maize hybrids aiming at increased yields.
The xenia effect in maize yield components was investigated in five field experiments conducted in two counties within the state of Minas Gerais, Lavras and RibeirÃo Vermelho, in the growing seasons 2004/05 and 2005/06. Aiming at a possible practical use of this effect in commercial cultivation, four experiments were conduct as close as possible to those on
Publicado em: 2006
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9. Grain yield of single cross maize hybrids, derived from S0 populations, and relationship with genetic distance based on microsatellite markers / Produtividade de hÃbridos de milho, derivados de populaÃÃes S0, e associaÃÃo com distÃncia genÃtica baseada em microssatÃlites.
This work was carried out with the objective of evaluate the viability of producing inter and intrapopulation hybrids of maize from S0 populations of single cross hybrid, and to correlate the genetic distances obtained from microsatellites markers among the parents and the grain yield and heterosis of the hybrids. Three S0 populations from the single cross h
Publicado em: 2005
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10. Comparison of RAPD, RFLP, AFLP and SSR markers for diversity studies in tropical maize inbred lines
In order to compare their relative efficiencies as markers and to find the most suitable marker for maize diversity studies we evaluated 18 inbred tropical maize lines using a number of different loci as markers. The loci used were: 774 amplified fragment length polymorphisms (AFLPs); 262 random amplified polymorphic DNAs (RAPDs); 185 restriction fragment le
Genetics and Molecular Biology. Publicado em: 2004
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11. Qualidade de sementes de hÃbridos duplos de milho obtidas a partir das geraÃÃes F1 OU F2 / Quality Of Double Crosses Maize Hybrids Seeds Obtained From F1 or F2 Generations.
The objective of this work was to compare the health and physiological quality of double crosses maize hybrids seeds obtained from F1 and F2 generations of single crosses hybrids. Field trials were carried out at the Federal University of Lavras â UFLA in two sowing dates, september and december 2001. Four isolated plots were used in each sowing date to pro
Publicado em: 2003
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12. Use of best linear unbiased prediction in diallel analysis and in prediction of single crosses. / Uso do melhor preditor linear não viesado (BLUP) em análises dialélicas e predição de híbridos.
A obtenção de híbridos de milho está relacionada com o aumento de produtividade dessa cultura. Para isso, normalmente são realizados cruzamentos entre linhagens de diferentes grupos heteróticos, que são determinados pelos melhoristas de forma que seja maximizada a divergência entre eles. A escolha dos genitores a serem cruzados pode ser facilitada pe
Publicado em: 2003