Potencial de linhagens de feijão preto oriundas da população "Ouro Negro‟ x "Meia Noite‟

• Autor(a) principal: Oliveira, Bruna Mendes de
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4765
• topic: Phaseolus vulgaris L.; Índice de seleção; Melhoramento de feijão-comum; Adaptabilidade e estabilidade; Estratégias de seleção; Phaseolus vulgaris L.; Selection index; Improvement of common bean; Analysis of adaptability; Selection strategies; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA::MELHORAMENTO VEGETAL

The main objective of this work was to identify lines of black beans with the potential to make future tests of Value for Cultivation and Use (VCU) in Minas Gerais. Thus, 93 lines of the population "Ouro Negro" x "Meia Noite", conducted by bulk method, bulk method with selection for grain aspect and SSD, with 31 lines in each method, were evaluated. The experiments were conducted at the experimental area, of the Universidade Federal de Viçosa, Department of Plant Science, in Coimbra, Minas Gerais, during the winter season (sowing in Jun/Jul) and dry season (sowing in Feb/Mar) of 2009 and 2010. We used a randomized block design with three repetitions and plots of two 2-meters long lines. In all the experiments were evaluated yield, plant architecture, grain aspect and hundred grain weight. The cooking time was measured with the seeds harvested in the winter season of 2010. The assessment of reaction to races 65, 73, 81, 87 and 89 of Colletotrichum lindemuthianum was done under controlled conditions, with inoculation. Individual and compound analyses of variance were carried out for yield, plant architecture, grain aspect and hundred grain weight. The selection of the most promising lines was based on resistance to anthracnose, in cooking time and in the selection index of the genotype-ideotype, modified to take into consideration all evaluation environments. In addition, analysis of adaptability and stability of the centroid method with additional points, were performed. Two lines were promising, even outperform the "Ouro Negro‟ in some important attributes. These lines are candidates for future tests of VCU in Minas Gerais. The selection index of the genotype-ideotype showed efficient for the selection of lines and, with minor modifications, can be used to cover the several evaluation environments. Considering the origin of the lines in methods of conductions the segregating population, we can imply that the bulk with selection for grain aspect was better than the bulk and SSD methods when it comes to the potential of the population for the extraction of superior lines of beans.