Diallel Cross
Mostrando 25-36 de 57 artigos, teses e dissertações.
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25. Avaliação de genótipos de mamona (Ricinus communis L.) em cruzamentos dialélicos parciais / Evaluation of castor (Ricinus communis L.) genotypes in partial diallel crosses
Castor has been a very important crop in northeastern Brazil, and has been characterized as low input agriculture of small farmers. Nowadays it became a very important crop in other places of Brazil, due to the possibility of biodiesel production. Most of castor crop in Brazil is based in landraces and only a few cultivars were released by breeding programs.
Publicado em: 2008
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26. Determinação da heterose e da capacidade geral e específica de combinação para dez características agronômicas em pimentão (Capsicum annuum L.).
The aim of the present study was to evaluate the agronomic potential, general and specific capability to combine and heterosis between the varieties of sweet pepper (Capsicum annuum L.). The experiments were conducted at the Crop Area of the Agronomy Department of the Federal Rural University of Pernambuco in Recife, Pernambuco (Brazil) (latitude 8 10 52 S a
Publicado em: 2008
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27. 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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28. Heterosis and combining abilitiy of summer squash lines selected for parthenocarpy and resistance to Papaya ringspot virus (PRSV-W) / Heterose e capacidade combinatÃria de linhagens de abobrinha partenocÃrpicas e resistentes ao Papaya ringspot virus(PRSV-W)
This objective of this work was to study the combining ability of summer squash lines selected for parthenocarpy and resistance to Papaya ringspot virus (PRSV-W), and the expression of heterosis in hybrids derived from them. The genetic material comprised 24 genotypes of Cucurbita pepo L. in a partial diallel cross design - four group I parental lines, four
Publicado em: 2007
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29. Desempenho de populações segregantes de algodoeiro obtidas por três métodos de hibridação
CHAPTER I - The objectives of this research were to make predictions on segregant populations performance on upland cotton as for selection, using the method proposed by Jinks and Pooni (1976), as well as to identify amongst three different crossing methods, which will originate the most promising population for selection purposes. The present work was condu
Publicado em: 2007
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30. Desempenho de populaÃÃes segregantes de algodoeiro obtidas por trÃs mÃtodos de hibridaÃÃo
CHAPTER I - The objectives of this research were to make predictions on segregant populationsâ performance on upland cotton as for selection, using the method proposed by Jinks and Pooni (1976), as well as to identify amongst three different crossing methods, which will originate the most promising population for selection purposes. The present work was con
Publicado em: 2007
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31. Análise dialélica de Jinks &Hayman em genótipos de algodoeiro / Diallel analysis on upland cotton hybrids
This research aimed at the estimation of genetic parameters in a diallel cross according to the methodology developed by Jinks &Hayman. The experiment was conducted in an experimental area of the Agronomy Dept. of the ILES/ULBRA University, at Itumbiara, Goiás, Brazil in 2003. Treatments tested comprised the eight parental cultivars and their 28 hybrid comb
Publicado em: 2006
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32. AnÃlise dialÃlica de Jinks &Hayman em genÃtipos de algodoeiro / Diallel analysis on upland cotton hybrids
This research aimed at the estimation of genetic parameters in a diallel cross according to the methodology developed by Jinks &Hayman. The experiment was conducted in an experimental area of the Agronomy Dept. of the ILES/ULBRA University, at Itumbiara, GoiÃs, Brazil in 2003. Treatments tested comprised the eight parental cultivars and their 28 hybrid comb
Publicado em: 2006
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33. Genetic basis of quantitative traits in different oat (Avena sativa L.) populations / Bases genéticas de caracteres quantitativos em diferentes populações de aveia (Avena sativa L.)
In the investigations performed with the oat crop, many mechanisms have been proposed with the goal of maximizing the genetic gains in different quantitative traits, especially on segregating populations, where a greater level of genetic interaction is expected. On the other hand, great value has been attributed to the right choice of environmentally adapted
Publicado em: 2006
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34. Phenotypic recurrent selection in common bean for resistance to Phaeoisariopsis griseola / SeleÃÃo recorrente fenotÃpica no feijoeiro visando a resistÃncia a Phaeoisariopsis griseola
The present work was carried out to evaluate the efficiency of phenotypic recurrent selection to obtain common bean lines resistant to Phaeoisariopsis griseola. The base population was obtained from a partial diallel cross involving seven parents with carioca-grain type (Carioca MG, CI-140, CI-128, ANPAT 8,12, IAPAR 81, 693 ESAL and PÃrola) and ten sources
Publicado em: 2006
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35. 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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36. Prediction of hybrid means from a partial circulant diallel table using the ordinary least square and the mixed model methods
By definition, the genetic effects obtained from a circulant diallel table are random. However, because of the methods of analysis, those effects have been considered as fixed. Two different statistical approaches were applied. One assumed the model to be fixed and obtained solutions through the ordinary least square (OLS) method. The other assumed a mixed m
Genetics and Molecular Biology. Publicado em: 2005