875 resultados para Mutação genética


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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The objective was to evaluate the genetic diversity of cultivars in sugar cane for resistance to D. saccharalis. The experiment was carried out in the laboratory in completely randomized design with 11 treatments (one control and 10 treatments) in ten replications. The replications were made from artificial diets (food and refood) made with dry steam crushed from sugar cane cultivars stems, except for one of them considered standard diet. The cultivars used were: RB867515, RB855453, RB855536, CTC 15, CTC 9, SP80-1842, SP79-1011, SP89-1115, SP81-3250 and SP87-365. In the evaluation biological characteristics of the insect considered were: larval development (days), larval viability (%), pupal development (days), pupal weight (g), pupal viability (%), period of hatched larvae to adults emergence (days), total viability (%) and adults longevity without food (days). The generalized Mahalanobis distance (D-2) for the cluster analysis by the method of average linkage between groups (UPGMA) and Tocher's method optimization was determined. Four and five groups were formed, respectively, by the method of average linkage between groups (UPGMA) and Tocher's method optimization. We concluded that the cultivar CTC 15 standed out as highly susceptible to D. saccharalis, while the cultivar SP87-365 behaved as moderately resistant by antibiosis to D. saccharalis.

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The aim of this work was to evaluate the genetics divergence of bean genotypes in relation to the oviposition, feeding and development of Zabrotes subfasciatus, determining the degrees of resistance to the weevil. The genotypes used were: IAC Carioca-Tybata, IAC Fortaleza, IAPAR 81, IAC Carioca-Ete, IAC Galante, IAC Harmonia, IAC Una, IAC Diplomata, BRS Supremo and RAZ 49. Tests were performed in laboratory under controlled humidity, temperature and photophase conditions. In free choice test, 10 g of bean genotypes seeds were distributed in circular openings placed equidistant from each other in aluminum trays, where 70 couples were released. The attractiveness was evaluated 24 hours and seven days after the experiment started, and then the number of eggs was evaluated. In non choice test, 10 g of seeds were used where seven couples of Z. subfasciatus, 24 hours-old, were released, remaining seven days, and after the adults retreat, the total number of eggs, viable and unviable eggs, the number and percentage of emerged adults, weight, longevity and period from egg to adult of males and females, sex ratio, dry mass and dry mass consumed by insect were evaluated. In the genotype IAC Harmonia was observed the lower oviposition; RAZ 49 was the most non preference-type resistant for feeding and/or antibiosis-type resistant; BRS Supremo, IAC Carioca-Ete and IAPAR 81 are no preference for feeding and/or antibiosis-type moderate resistant; IAC Galante is susceptible and the other genotypes are highly susceptible to Z. subfasciatus.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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One of the principal themes of genetic epistemology is the study of the psycho-genetic and historical-critical constitution of knowledge and its necessary structures. A main topic in this area is the relationship between abstract logical-mathematical structures and the epistemological-psychological structures of the epistemic subject. In genetic epistemology, formalizing and axiomatizing epistemological-psychological structures constitute one of the principal methods for showing the correlation between the two types of structures: the formalization of the epistemological-psychological structureresults in an axiomatic formal system which also expresses the abstractlogical-mathematical structure. In this context, it is interesting to note that some epistemological-psychological structures have been resistant to formalization and axiomatization, as in the case of the structure of concrete operational period groupings. Cases like these lead us to ask if there are general methods of formalizing that are consistent with the results and the general basis of genetic epistemology and genetic psychology, especially with regard to the claim that formalizing is a process, not a state, and that such general methods must therefore conform with the possibility of the continuous constitution of epistemological-psychological structures. In this paper we present some reflections, based on the general concepts of genetic epistemology and psychology and on the logical-mathematical structures of digraphs, on proposing a general method of formalization consistent with the results and the general basis of these two areas, including the possibility of the continuous constitution of epistemological-psychological structures.

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This paper discusses some of the general foundations of my philosophical journey, from studies, researches and reflections on the sciences and Genetic Epistemology, to the proposal of a speculative idealist metaphysics and ontology. I initially introduce the notion of a system of human beings and their behavior, in order to contextualize the discussion of one of the central questions of the paper: how can the system of human beings and their behavior be comprehended? I then make some general considerations about Genetic Epistemology and Psychology, and analyze the consequences of the thesis inherent in them that the object is an essentially intellectual being. Next, I consider the possibility of a different perspective on the Theory of Knowledge. This leads to the question “how are the different philosophic systems possible?” and to the necessity of the constitution of a philosophy that is able to deal with this question from a viewpoint of totality and on the basis of a thought able to think itself. I then make some considerations on the establishment of such a philosophy in regard to genetic epistemology, and introduce the notion of idea. Finallly, a general research project is proposed (that this paper only announces) that aims to use some concepts and arguments inspired by Hegelian Speculative Philosophy (or related to it) in order to comprehend the system of human beings and their behavior, especially in the production scenario of contemporary science and philosophy, including Genetic Epistemology. I hope I have contributed to showing that another philosophical view (distinct from Piagetian naturalism) is at least possible, one that takes into account the experimental data of Genetic Epistemology and Psychology.

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In this paper we discuss the question of the a priori character of the necessary structures of knowledge according to Genetic Epistemology, focusing on the notion of space in particular. We establish some relations between Jean Piaget’s Genetic Epistemology and Immanuel Kant’s Critical Philosophy, discuss the notion of the a priori according to Kant in relation to the notion of space, and discuss the construction of the notion of space by the epistemic subject according to Genetic Epistemology, focusing on the Sensory-Motor Period. We conclude that, in Genetic Epistemology, space is still thought of as an a priori form of phenomena in the sense that the notion of space is what spatially organizes the data of perception, being the condition of perception. Furthermore, it is not directly abstracted from experience, but is constructed by the epistemic subject in its interaction with the environment, occurring with the structuring of the system of schemes of action. This analysis leads to the notion of the constructed a priori that, after its construction, has the characteristics of the a priori as conceived by Kant.

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Pós-graduação em Direito - FCHS

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Pós-graduação em Genética e Melhoramento Animal - FCAV

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Pós-graduação em Pesquisa e Desenvolvimento (Biotecnologia Médica) - FMB