Integração de mapas genéticos

• Ano de defesa: 2008
• Autor(a) principal: Salgado, Caio Césio
• Orientador(a): Cruz, Cosme Damião
• Banca de defesa: Barros, Willian Silva , Caixeta, Eveline Teixeira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Genética e Melhoramento
• Departamento: Genética animal; Genética molecular e de microrganismos; Genética quantitativa; Genética vegetal; Me
• País: BR
• Palavras-chave em Português: Mapa genético; Marcadores âncoras; Mapa consenso
• Palavras-chave em Inglês: Genetic map; Anchors markers; Consensus maps
• Área do conhecimento CNPq: CNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA QUANTITATIVA
• Link de acesso: http://locus.ufv.br/handle/123456789/4686

The genetic mapping facilitates the breeding work once one or more marks of the genotype can be associated to controlling genes of qualitative and quantitative characteristics (QTL). Genetic maps for several species have been built by different groups of researchers with different molecular markers and populations. A way to generate maps more saturated for those species would be the integration of the existent maps. The key to integrate different maps is the presence of common marks among them. Only when there are a minimum number of common marks among the different maps, these can be integrated. This way, the objective of this work was to develop a process of integration of genetic maps and to test the efficiency of this process. Data from the simulation of genome and populations were generated and analyzed. A important factor to obtain solid data in a mapping work is the sample or population size. Based in these simulated data it was evaluated the optimum population size to study the integration of genetic maps. To obtain and study the consensus maps, parental genomes and samples of co- dominant F2, dominant F2 and backcrosses populations were simulated. The generated samples had 100, 200, 400 individuals with 3 linkage groups each and 11 dominant and co-dominant molecular marks spaced by 5, 10 and 15 centiMorgans. 10 repetitions were accomplished by sample, five used to construct the consensus maps with analysis multilocus and other five without analysis multilocus. It was concluded that the obtention of the consensus maps becomes more efficient with the increase of the population size. A population size of 200 individuals would be enough to rescue the original information. To study the obtention of the effective integrated map samples of co-dominant F2 and backcrosses populations were simulated. The generated samples had 100, 200 and 400 individuals, 21 marks for linkage group and markers equidistant by 5 cM, in a total of four simulations for co-dominant F2 and four for backcrosses. Each simulated genome was fragmented in four new maps which three maps had eight markers and one had nine markers, each one of these maps containing four markers that are anchors among the four maps. These new maps were aligned, orderly and integrated and then compared with the original map. It was concluded that the process of ordainment and integration are efficient to obtain the integrated map. The population size exercises influence on the map and the distances measures among the marks.