Progresso genético do programa de seleção recorrente para produtividade de grãos de feijoeiro-comum da EMBRAPA

• Ano de defesa: 2018
• Autor(a) principal: Farias , Filipe Cavalcante
• Orientador(a): Melo, Patrícia Guimarães Santos
• Banca de defesa: Melo, Patrícia Guimarães Santos, Resende, Marcela Pedroso Mendes, Silva, Fernanda de Cássia
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Genética e Melhoramento de Plantas (EA)
• Departamento: Escola de Agronomia - EA (RG)
• País: Brasil
• Palavras-chave em Português: Ganho genético; Phaseolus vulgaris; Ciclo de seleção; Qualidade de grão; Estabilidade e adaptabilidade
• Palavras-chave em Inglês: Genetic gain; Phaseolus vulgaris; Selection cycle; Grain quality; Adaptability and stability
• Área do conhecimento CNPq: AGRONOMIA::CIENCIA DO SOLO
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/9186

The advantage of using recurrent selection is the increase of favorable alleles without significant loss of genetic variability present in the population. The objectives of this study were to estimate the genetic progress in two cycles of recurrent selection for grain yield, lodging resistance, plant architecture and commercial quality of grains and to study the adaptability and stability of the progenies of the two selective cycles. The 19 best progenies of cycle 0 (C0) and 20 of cycle 1 (C1) and three controls (BRS Cometa, BRS Pontal and BRS Estilo) were evaluated in nine environments. The 42 treatments were arranged in randomized blocks, with three replications. The plots consisted of two lines of four meters and spacing of 45 cm between rows. The estimated genetic progress (PG) was obtained based on the comparison of the means of the progenies selected in each cycle. Genetic variability was verified between the progenies of the two cycles for all evaluated characters. Genetic progress for grain yield was 11.5% (1.9% per year), plant architecture and lodging resistance 5.8% (0.9% per year) and 14% (2.3% per year), respectively. Regarding the commercial quality of grains, the genetic progress was 4.2% (0.7% per year), 1.9% (0.6%) 4.4% (0.73% per year) for mass of 100 grains, sieve yield and grain color score, respectively. It was also verified greater phenotypic stability of C1 progenies in relation to C0. These results prove the efficiency of the recurrent selection program in obtaining genetic gains for several complex inheritance characters.