331 resultados para Mosquitos - Genética


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Pós-graduação em Genética e Melhoramento Animal - FCAV

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Pós-graduação em Genética - IBILCE

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The aim of this study was to analyse the genetic diversity and agronomic performance of a group of advanced and superior strains of soybean, derived from biparental, four-way and eight-way crosses, in order to identify future promising and superior combinations. The experiment was carried out in the experimental area of the Paulista State University, Julio de Mesquita Filho, Jaboticabal Campus, in the state of Sao Paulo, Brazil. The characteristics under evaluation were: number of days to flowering, plant height at flowering, number of days to maturity, plant height at maturity, height of the first pod, number of branches, number of pods per plant, agronomic value, lodging, one hundred seed weight and seed yield., The Mahalanobis distance and the relative contribution of each characteristic were used to calculate the phenotypic distances. Among the genotypes analysed, 19 strains displayed high productivity, being superior to the controls (V-max, CD 216, CD 219 and Conquista). The greatest distance found was between strains JAB 41 and JAB 17 (279.81), followed by JAB 40 and JAB 17 (261.38) and between JAB 40 and JAB 22 (255.46). There were six groups formed using the Ward method, indicating the presence of genetic variability among the tested strains. Increasing the number of parents had no effect on the increase in genetic diversity between the strains, and was not the factor responsible for the grouping or not of the genotypes under test.

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One of the greatest challenges for the agricultural system is to establish agricultural production combined with the conservation of genetic resources, mainly aiming to protect the Permanent Preservation Areas. In this context, mulungu ( Erythrina velutina Willd), among other native species, has been suffering with anthropogenic pressures in various ecosystems, causing reductions in its genetic basis. This work aims to identify ecological and genetic population parameters as indicators of sustainability in two natural populations of mulungu, located in riparian forest, in the state of Sergipe, and to assess the tendency to their sustainability, aiming genetic conservation of the species. The matrix of Pressure-State-Impact/Effect-Response (PEI/ER) was used with the selection of 13 indicators, from the use of RAPDmolecular markers and biochemical (enzymes) markers in populations, in order to present them as relevant information to measure progress as for sustainability and conservation ofmulungu. The studied populations presented low tendency to sustainability, requiring strategies to change this status.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Agronomia (Horticultura) - FCA

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El presente trabajo hace parte de una investigación más amplia y para efectos de este artículo se consideró la pregunta problema ¿Cuáles comprensiones sobre ciencia se van construyendo por parte de los licenciandos al abordar la polémica del Diagnóstico preimplantación genética (DPG)? Y como objetivo se planteó analizar dichas comprensiones en la perspectiva de la formación de profesores. El grupo participante correspondió a 14 estudiantes de licenciatura de una universidad colombiana que participaron de un seminario sobre la polémica del DPG, a través de lecturas de noticias de periódicos nacionales, presentaciones y debates. Algunos resultados indican comprensiones tales como la relación del desarrollo científico con aspectos éticos y la comprensión sobre la ciencia como factor de poder; las cuales posibilitan mayor entendimiento de la NdC con aspectos políticos y éticos necesarios para pensar la formación de profesores.

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Pós-graduação em Genética e Melhoramento Animal - FCAV